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-rw-r--r--Documentation/acpi/gpio-properties.txt62
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-sx150x.txt41
-rw-r--r--Documentation/devicetree/bindings/pinctrl/pinctrl-sx150x.txt69
-rw-r--r--Documentation/gpio/driver.txt62
-rw-r--r--arch/arm/mach-integrator/impd1.c1
-rw-r--r--drivers/gpio/Kconfig38
-rw-r--r--drivers/gpio/Makefile3
-rw-r--r--drivers/gpio/gpio-adnp.c12
-rw-r--r--drivers/gpio/gpio-altera-a10sr.c130
-rw-r--r--drivers/gpio/gpio-arizona.c9
-rw-r--r--drivers/gpio/gpio-axp209.c8
-rw-r--r--drivers/gpio/gpio-crystalcove.c6
-rw-r--r--drivers/gpio/gpio-davinci.c7
-rw-r--r--drivers/gpio/gpio-dln2.c1
-rw-r--r--drivers/gpio/gpio-etraxfs.c7
-rw-r--r--drivers/gpio/gpio-htc-egpio.c54
-rw-r--r--drivers/gpio/gpio-intel-mid.c7
-rw-r--r--drivers/gpio/gpio-max732x.c17
-rw-r--r--drivers/gpio/gpio-max77620.c11
-rw-r--r--drivers/gpio/gpio-mb86s7x.c6
-rw-r--r--drivers/gpio/gpio-mcp23s08.c17
-rw-r--r--drivers/gpio/gpio-merrifield.c33
-rw-r--r--drivers/gpio/gpio-mxs.c45
-rw-r--r--drivers/gpio/gpio-pca953x.c18
-rw-r--r--drivers/gpio/gpio-pcf857x.c11
-rw-r--r--drivers/gpio/gpio-pl061.c208
-rw-r--r--drivers/gpio/gpio-stmpe.c19
-rw-r--r--drivers/gpio/gpio-sx150x.c792
-rw-r--r--drivers/gpio/gpio-tc3589x.c17
-rw-r--r--drivers/gpio/gpio-vf610.c6
-rw-r--r--drivers/gpio/gpio-wcove.c6
-rw-r--r--drivers/gpio/gpiolib-acpi.c107
-rw-r--r--drivers/gpio/gpiolib-devprop.c67
-rw-r--r--drivers/gpio/gpiolib-of.c51
-rw-r--r--drivers/gpio/gpiolib.c107
-rw-r--r--drivers/gpio/gpiolib.h2
-rw-r--r--drivers/pinctrl/Kconfig14
-rw-r--r--drivers/pinctrl/Makefile1
-rw-r--r--drivers/pinctrl/pinctrl-sx150x.c1062
-rw-r--r--include/linux/amba/pl061.h16
-rw-r--r--include/linux/gpio/driver.h34
-rw-r--r--tools/gpio/gpio-hammer.c67
-rw-r--r--tools/gpio/gpio-utils.c256
-rw-r--r--tools/gpio/gpio-utils.h16
44 files changed, 2228 insertions, 1295 deletions
diff --git a/Documentation/acpi/gpio-properties.txt b/Documentation/acpi/gpio-properties.txt
index 5aafe0b351a1..2aff0349facd 100644
--- a/Documentation/acpi/gpio-properties.txt
+++ b/Documentation/acpi/gpio-properties.txt
@@ -51,6 +51,68 @@ it to 1 marks the GPIO as active low.
In our Bluetooth example the "reset-gpios" refers to the second GpioIo()
resource, second pin in that resource with the GPIO number of 31.
+It is possible to leave holes in the array of GPIOs. This is useful in
+cases like with SPI host controllers where some chip selects may be
+implemented as GPIOs and some as native signals. For example a SPI host
+controller can have chip selects 0 and 2 implemented as GPIOs and 1 as
+native:
+
+ Package () {
+ "cs-gpios",
+ Package () {
+ ^GPIO, 19, 0, 0, // chip select 0: GPIO
+ 0, // chip select 1: native signal
+ ^GPIO, 20, 0, 0, // chip select 2: GPIO
+ }
+ }
+
+Other supported properties
+--------------------------
+
+Following Device Tree compatible device properties are also supported by
+_DSD device properties for GPIO controllers:
+
+- gpio-hog
+- output-high
+- output-low
+- input
+- line-name
+
+Example:
+
+ Name (_DSD, Package () {
+ // _DSD Hierarchical Properties Extension UUID
+ ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ Package () {
+ Package () {"hog-gpio8", "G8PU"}
+ }
+ })
+
+ Name (G8PU, Package () {
+ ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ Package () {
+ Package () {"gpio-hog", 1},
+ Package () {"gpios", Package () {8, 0}},
+ Package () {"output-high", 1},
+ Package () {"line-name", "gpio8-pullup"},
+ }
+ })
+
+- gpio-line-names
+
+Example:
+
+ Package () {
+ "gpio-line-names",
+ Package () {
+ "SPI0_CS_N", "EXP2_INT", "MUX6_IO", "UART0_RXD", "MUX7_IO",
+ "LVL_C_A1", "MUX0_IO", "SPI1_MISO"
+ }
+ }
+
+See Documentation/devicetree/bindings/gpio/gpio.txt for more information
+about these properties.
+
ACPI GPIO Mappings Provided by Drivers
--------------------------------------
diff --git a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt
deleted file mode 100644
index c809acb9c71b..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-SEMTECH SX150x GPIO expander bindings
-
-
-Required properties:
-
-- compatible: should be "semtech,sx1506q",
- "semtech,sx1508q",
- "semtech,sx1509q",
- "semtech,sx1502q".
-
-- reg: The I2C slave address for this device.
-
-- interrupt-parent: phandle of the parent interrupt controller.
-
-- interrupts: Interrupt specifier for the controllers interrupt.
-
-- #gpio-cells: Should be 2. The first cell is the GPIO number and the
- second cell is used to specify optional parameters:
- bit 0: polarity (0: normal, 1: inverted)
-
-- gpio-controller: Marks the device as a GPIO controller.
-
-- interrupt-controller: Marks the device as a interrupt controller.
-
-The GPIO expander can optionally be used as an interrupt controller, in
-which case it uses the default two cell specifier as described in
-Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
-
-Example:
-
- i2c_gpio_expander@20{
- #gpio-cells = <2>;
- #interrupt-cells = <2>;
- compatible = "semtech,sx1506q";
- reg = <0x20>;
- interrupt-parent = <&gpio_1>;
- interrupts = <16 0>;
-
- gpio-controller;
- interrupt-controller;
- };
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-sx150x.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-sx150x.txt
new file mode 100644
index 000000000000..c293c8aaac73
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-sx150x.txt
@@ -0,0 +1,69 @@
+SEMTECH SX150x GPIO expander bindings
+
+Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
+../interrupt-controller/interrupts.txt for generic information regarding
+pin controller, GPIO, and interrupt bindings.
+
+Required properties:
+- compatible: should be one of :
+ "semtech,sx1506q",
+ "semtech,sx1508q",
+ "semtech,sx1509q",
+ "semtech,sx1502q".
+
+- reg: The I2C slave address for this device.
+
+- #gpio-cells: Should be 2. The first cell is the GPIO number and the
+ second cell is used to specify optional parameters:
+ bit 0: polarity (0: normal, 1: inverted)
+
+- gpio-controller: Marks the device as a GPIO controller.
+
+Optional properties :
+- interrupt-parent: phandle of the parent interrupt controller.
+
+- interrupts: Interrupt specifier for the controllers interrupt.
+
+- interrupt-controller: Marks the device as a interrupt controller.
+
+- semtech,probe-reset: Will trigger a reset of the GPIO expander on probe,
+ only for sx1508q and sx1509q
+
+The GPIO expander can optionally be used as an interrupt controller, in
+which case it uses the default two cell specifier.
+
+Required properties for pin configuration sub-nodes:
+ - pins: List of pins to which the configuration applies.
+
+Optional properties for pin configuration sub-nodes:
+----------------------------------------------------
+ - bias-disable: disable any pin bias, except the OSCIO pin
+ - bias-pull-up: pull up the pin, except the OSCIO pin
+ - bias-pull-down: pull down the pin, except the OSCIO pin
+ - bias-pull-pin-default: use pin-default pull state, except the OSCIO pin
+ - drive-push-pull: drive actively high and low
+ - drive-open-drain: drive with open drain only for sx1508q and sx1509q and except the OSCIO pin
+ - output-low: set the pin to output mode with low level
+ - output-high: set the pin to output mode with high level
+
+Example:
+
+ i2c0gpio-expander@20{
+ #gpio-cells = <2>;
+ #interrupt-cells = <2>;
+ compatible = "semtech,sx1506q";
+ reg = <0x20>;
+ interrupt-parent = <&gpio_1>;
+ interrupts = <16 0>;
+
+ gpio-controller;
+ interrupt-controller;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&gpio1_cfg_pins>;
+
+ gpio1_cfg_pins: gpio1-cfg {
+ pins = "gpio1";
+ bias-pull-up;
+ };
+ };
diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt
index 368d5a294d89..747c721776ed 100644
--- a/Documentation/gpio/driver.txt
+++ b/Documentation/gpio/driver.txt
@@ -175,8 +175,8 @@ The IRQ portions of the GPIO block are implemented using an irqchip, using
the header <linux/irq.h>. So basically such a driver is utilizing two sub-
systems simultaneously: gpio and irq.
-RT_FULL: GPIO driver should not use spinlock_t or any sleepable APIs
-(like PM runtime) as part of its irq_chip implementation on -RT.
+RT_FULL: a realtime compliant GPIO driver should not use spinlock_t or any
+sleepable APIs (like PM runtime) as part of its irq_chip implementation.
- spinlock_t should be replaced with raw_spinlock_t [1].
- If sleepable APIs have to be used, these can be done from the .irq_bus_lock()
and .irq_bus_unlock() callbacks, as these are the only slowpath callbacks
@@ -185,33 +185,32 @@ RT_FULL: GPIO driver should not use spinlock_t or any sleepable APIs
GPIO irqchips usually fall in one of two categories:
* CHAINED GPIO irqchips: these are usually the type that is embedded on
- an SoC. This means that there is a fast IRQ handler for the GPIOs that
+ an SoC. This means that there is a fast IRQ flow handler for the GPIOs that
gets called in a chain from the parent IRQ handler, most typically the
- system interrupt controller. This means the GPIO irqchip is registered
- using irq_set_chained_handler() or the corresponding
- gpiochip_set_chained_irqchip() helper function, and the GPIO irqchip
- handler will be called immediately from the parent irqchip, while
- holding the IRQs disabled. The GPIO irqchip will then end up calling
- something like this sequence in its interrupt handler:
-
- static irqreturn_t tc3589x_gpio_irq(int irq, void *data)
+ system interrupt controller. This means that the GPIO irqchip handler will
+ be called immediately from the parent irqchip, while holding the IRQs
+ disabled. The GPIO irqchip will then end up calling something like this
+ sequence in its interrupt handler:
+
+ static irqreturn_t foo_gpio_irq(int irq, void *data)
chained_irq_enter(...);
generic_handle_irq(...);
chained_irq_exit(...);
Chained GPIO irqchips typically can NOT set the .can_sleep flag on
- struct gpio_chip, as everything happens directly in the callbacks.
+ struct gpio_chip, as everything happens directly in the callbacks: no
+ slow bus traffic like I2C can be used.
RT_FULL: Note, chained IRQ handlers will not be forced threaded on -RT.
As result, spinlock_t or any sleepable APIs (like PM runtime) can't be used
in chained IRQ handler.
- if required (and if it can't be converted to the nested threaded GPIO irqchip)
- - chained IRQ handler can be converted to generic irq handler and this way
- it will be threaded IRQ handler on -RT and hard IRQ handler on non-RT
+ If required (and if it can't be converted to the nested threaded GPIO irqchip)
+ a chained IRQ handler can be converted to generic irq handler and this way
+ it will be a threaded IRQ handler on -RT and a hard IRQ handler on non-RT
(for example, see [3]).
Know W/A: The generic_handle_irq() is expected to be called with IRQ disabled,
- so IRQ core will complain if it will be called from IRQ handler which is
- forced thread. The "fake?" raw lock can be used to W/A this problem:
+ so the IRQ core will complain if it is called from an IRQ handler which is
+ forced to a thread. The "fake?" raw lock can be used to W/A this problem:
raw_spinlock_t wa_lock;
static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank)
@@ -243,7 +242,7 @@ GPIO irqchips usually fall in one of two categories:
by the driver. The hallmark of this driver is to call something like
this in its interrupt handler:
- static irqreturn_t tc3589x_gpio_irq(int irq, void *data)
+ static irqreturn_t foo_gpio_irq(int irq, void *data)
...
handle_nested_irq(irq);
@@ -256,23 +255,31 @@ associated irqdomain and resource allocation callbacks, the gpiolib has
some helpers that can be enabled by selecting the GPIOLIB_IRQCHIP Kconfig
symbol:
-* gpiochip_irqchip_add(): adds an irqchip to a gpiochip. It will pass
+* gpiochip_irqchip_add(): adds a chained irqchip to a gpiochip. It will pass
the struct gpio_chip* for the chip to all IRQ callbacks, so the callbacks
need to embed the gpio_chip in its state container and obtain a pointer
to the container using container_of().
(See Documentation/driver-model/design-patterns.txt)
- If there is a need to exclude certain GPIOs from the IRQ domain, one can
- set .irq_need_valid_mask of the gpiochip before gpiochip_add_data() is
- called. This allocates .irq_valid_mask with as many bits set as there are
- GPIOs in the chip. Drivers can exclude GPIOs by clearing bits from this
- mask. The mask must be filled in before gpiochip_irqchip_add() is called.
+* gpiochip_irqchip_add_nested(): adds a nested irqchip to a gpiochip.
+ Apart from that it works exactly like the chained irqchip.
* gpiochip_set_chained_irqchip(): sets up a chained irq handler for a
gpio_chip from a parent IRQ and passes the struct gpio_chip* as handler
data. (Notice handler data, since the irqchip data is likely used by the
- parent irqchip!) This is for the chained type of chip. This is also used
- to set up a nested irqchip if NULL is passed as handler.
+ parent irqchip!).
+
+* gpiochip_set_nested_irqchip(): sets up a nested irq handler for a
+ gpio_chip from a parent IRQ. As the parent IRQ has usually been
+ explicitly requested by the driver, this does very little more than
+ mark all the child IRQs as having the other IRQ as parent.
+
+If there is a need to exclude certain GPIOs from the IRQ domain, you can
+set .irq_need_valid_mask of the gpiochip before gpiochip_add_data() is
+called. This allocates an .irq_valid_mask with as many bits set as there
+are GPIOs in the chip. Drivers can exclude GPIOs by clearing bits from this
+mask. The mask must be filled in before gpiochip_irqchip_add() or
+gpiochip_irqchip_add_nested() is called.
To use the helpers please keep the following in mind:
@@ -323,6 +330,9 @@ When implementing an irqchip inside a GPIO driver, these two functions should
typically be called in the .startup() and .shutdown() callbacks from the
irqchip.
+When using the gpiolib irqchip helpers, these callback are automatically
+assigned.
+
Real-Time compliance for GPIO IRQ chips
---------------------------------------
diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c
index ed9a01484030..a109f6482413 100644
--- a/arch/arm/mach-integrator/impd1.c
+++ b/arch/arm/mach-integrator/impd1.c
@@ -21,7 +21,6 @@
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/amba/mmci.h>
-#include <linux/amba/pl061.h>
#include <linux/io.h>
#include <linux/platform_data/clk-integrator.h>
#include <linux/slab.h>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ed37e5908b91..d5d36549ecc1 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -167,7 +167,7 @@ config GPIO_DWAPB
config GPIO_EM
tristate "Emma Mobile GPIO"
- depends on ARM && OF_GPIO
+ depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
help
Say yes here to support GPIO on Renesas Emma Mobile SoCs.
@@ -451,7 +451,7 @@ config GPIO_VR41XX
config GPIO_VX855
tristate "VIA VX855/VX875 GPIO"
- depends on PCI
+ depends on (X86 || COMPILE_TEST) && PCI
select MFD_CORE
select MFD_VX855
help
@@ -520,6 +520,7 @@ config GPIO_ZYNQ
config GPIO_ZX
bool "ZTE ZX GPIO support"
+ depends on ARCH_ZX || COMPILE_TEST
select GPIOLIB_IRQCHIP
help
Say yes here to support the GPIO device on ZTE ZX SoCs.
@@ -603,7 +604,7 @@ config GPIO_IT87
config GPIO_SCH
tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
- depends on PCI
+ depends on (X86 || COMPILE_TEST) && PCI
select MFD_CORE
select LPC_SCH
help
@@ -777,16 +778,13 @@ config GPIO_PCF857X
platform-neutral GPIO calls.
config GPIO_SX150X
- bool "Semtech SX150x I2C GPIO expander"
- depends on I2C=y
- select GPIOLIB_IRQCHIP
+ bool "Semtech SX150x I2C GPIO expander (deprecated)"
+ depends on PINCTRL && I2C=y
+ select PINCTRL_SX150X
default n
help
- Say yes here to provide support for Semtech SX150-series I2C
- GPIO expanders. Compatible models include:
-
- 8 bits: sx1508q
- 16 bits: sx1509q
+ Say yes here to provide support for Semtech SX150x-series I2C
+ GPIO expanders. The GPIO driver was replaced by a Pinctrl version.
config GPIO_TPIC2810
tristate "TPIC2810 8-Bit I2C GPO expander"
@@ -798,6 +796,7 @@ config GPIO_TPIC2810
config GPIO_TS4900
tristate "Technologic Systems FPGA I2C GPIO"
+ depends on SOC_IMX6 || COMPILE_TEST
select REGMAP_I2C
help
Say yes here to enabled the GPIO driver for Technologic's FPGA core.
@@ -814,6 +813,14 @@ config GPIO_ADP5520
This option enables support for on-chip GPIO found
on Analog Devices ADP5520 PMICs.
+config GPIO_ALTERA_A10SR
+ tristate "Altera Arria10 System Resource GPIO"
+ depends on MFD_ALTERA_A10SR
+ help
+ Driver for Arria10 Development Kit GPIO expansion which
+ includes reads of pushbuttons and DIP switches as well
+ as writes to LEDs.
+
config GPIO_ARIZONA
tristate "Wolfson Microelectronics Arizona class devices"
depends on MFD_ARIZONA
@@ -822,7 +829,7 @@ config GPIO_ARIZONA
config GPIO_CRYSTAL_COVE
tristate "GPIO support for Crystal Cove PMIC"
- depends on INTEL_SOC_PMIC
+ depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
select GPIOLIB_IRQCHIP
help
Support for GPIO pins on Crystal Cove PMIC.
@@ -835,6 +842,7 @@ config GPIO_CRYSTAL_COVE
config GPIO_CS5535
tristate "AMD CS5535/CS5536 GPIO support"
+ depends on X86 || MIPS || COMPILE_TEST
depends on MFD_CS5535
help
The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
@@ -927,7 +935,7 @@ config GPIO_MAX77620
config GPIO_MSIC
bool "Intel MSIC mixed signal gpio support"
- depends on MFD_INTEL_MSIC
+ depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC
help
Enable support for GPIO on intel MSIC controllers found in
intel MID devices
@@ -1028,7 +1036,7 @@ config GPIO_UCB1400
config GPIO_WHISKEY_COVE
tristate "GPIO support for Whiskey Cove PMIC"
- depends on INTEL_SOC_PMIC
+ depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
select GPIOLIB_IRQCHIP
help
Support for GPIO pins on Whiskey Cove PMIC.
@@ -1067,6 +1075,7 @@ menu "PCI GPIO expanders"
config GPIO_AMD8111
tristate "AMD 8111 GPIO driver"
+ depends on X86 || COMPILE_TEST
help
The AMD 8111 south bridge contains 32 GPIO pins which can be used.
@@ -1108,6 +1117,7 @@ config GPIO_MERRIFIELD
config GPIO_ML_IOH
tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
+ depends on X86 || COMPILE_TEST
select GENERIC_IRQ_CHIP
help
ML7213 is companion chip for Intel Atom E6xx series.
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index d074c2299393..a7676b82de6f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -5,6 +5,7 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
obj-$(CONFIG_GPIOLIB) += devres.o
obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
+obj-$(CONFIG_GPIOLIB) += gpiolib-devprop.o
obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o
obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
@@ -24,6 +25,7 @@ obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o
obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o
+obj-$(CONFIG_GPIO_ALTERA_A10SR) += gpio-altera-a10sr.o
obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o
obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
@@ -102,7 +104,6 @@ obj-$(CONFIG_GPIO_SPEAR_SPICS) += gpio-spear-spics.o
obj-$(CONFIG_GPIO_STA2X11) += gpio-sta2x11.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
obj-$(CONFIG_GPIO_STP_XWAY) += gpio-stp-xway.o
-obj-$(CONFIG_GPIO_SX150X) += gpio-sx150x.o
obj-$(CONFIG_GPIO_SYSCON) += gpio-syscon.o
obj-$(CONFIG_GPIO_TB10X) += gpio-tb10x.o
obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index 8ff7b0d3eac6..89863ea25de1 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/drivers/gpio/gpio-adnp.c
@@ -468,17 +468,19 @@ static int adnp_irq_setup(struct adnp *adnp)
return err;
}
- err = gpiochip_irqchip_add(chip,
- &adnp_irq_chip,
- 0,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ err = gpiochip_irqchip_add_nested(chip,
+ &adnp_irq_chip,
+ 0,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (err) {
dev_err(chip->parent,
"could not connect irqchip to gpiochip\n");
return err;
}
+ gpiochip_set_nested_irqchip(chip, &adnp_irq_chip, adnp->client->irq);
+
return 0;
}
diff --git a/drivers/gpio/gpio-altera-a10sr.c b/drivers/gpio/gpio-altera-a10sr.c
new file mode 100644
index 000000000000..9e1a138fed53
--- /dev/null
+++ b/drivers/gpio/gpio-altera-a10sr.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright Intel Corporation (C) 2014-2016. All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * GPIO driver for Altera Arria10 MAX5 System Resource Chip
+ *
+ * Adapted from gpio-tps65910.c
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/mfd/altera-a10sr.h>
+#include <linux/module.h>
+
+/**
+ * struct altr_a10sr_gpio - Altera Max5 GPIO device private data structure
+ * @gp: : instance of the gpio_chip
+ * @regmap: the regmap from the parent device.
+ */
+struct altr_a10sr_gpio {
+ struct gpio_chip gp;
+ struct regmap *regmap;
+};
+
+static int altr_a10sr_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip);
+ int ret, val;
+
+ ret = regmap_read(gpio->regmap, ALTR_A10SR_PBDSW_REG, &val);
+ if (ret < 0)
+ return ret;
+
+ return !!(val & BIT(offset - ALTR_A10SR_LED_VALID_SHIFT));
+}
+
+static void altr_a10sr_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip);
+
+ regmap_update_bits(gpio->regmap, ALTR_A10SR_LED_REG,
+ BIT(ALTR_A10SR_LED_VALID_SHIFT + offset),
+ value ? BIT(ALTR_A10SR_LED_VALID_SHIFT + offset)
+ : 0);
+}
+
+static int altr_a10sr_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int nr)
+{
+ if (nr >= (ALTR_A10SR_IN_VALID_RANGE_LO - ALTR_A10SR_LED_VALID_SHIFT))
+ return 0;
+ return -EINVAL;
+}
+
+static int altr_a10sr_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int nr, int value)
+{
+ if (nr <= (ALTR_A10SR_OUT_VALID_RANGE_HI - ALTR_A10SR_LED_VALID_SHIFT))
+ return 0;
+ return -EINVAL;
+}
+
+static struct gpio_chip altr_a10sr_gc = {
+ .label = "altr_a10sr_gpio",
+ .owner = THIS_MODULE,
+ .get = altr_a10sr_gpio_get,
+ .set = altr_a10sr_gpio_set,
+ .direction_input = altr_a10sr_gpio_direction_input,
+ .direction_output = altr_a10sr_gpio_direction_output,
+ .can_sleep = true,
+ .ngpio = 12,
+ .base = -1,
+};
+
+static int altr_a10sr_gpio_probe(struct platform_device *pdev)
+{
+ struct altr_a10sr_gpio *gpio;
+ int ret;
+ struct altr_a10sr *a10sr = dev_get_drvdata(pdev->dev.parent);
+
+ gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+ if (!gpio)
+ return -ENOMEM;
+
+ gpio->regmap = a10sr->regmap;
+
+ gpio->gp = altr_a10sr_gc;
+
+ gpio->gp.of_node = pdev->dev.of_node;
+
+ ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, gpio);
+
+ return 0;
+}
+
+static const struct of_device_id altr_a10sr_gpio_of_match[] = {
+ { .compatible = "altr,a10sr-gpio" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, altr_a10sr_gpio_of_match);
+
+static struct platform_driver altr_a10sr_gpio_driver = {
+ .probe = altr_a10sr_gpio_probe,
+ .driver = {
+ .name = "altr_a10sr_gpio",
+ .of_match_table = of_match_ptr(altr_a10sr_gpio_of_match),
+ },
+};
+module_platform_driver(altr_a10sr_gpio_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Thor Thayer <tthayer@opensource.altera.com>");
+MODULE_DESCRIPTION("Altera Arria10 System Resource Chip GPIO");
diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
index 482462889c8f..1f91557717a6 100644
--- a/drivers/gpio/gpio-arizona.c
+++ b/drivers/gpio/gpio-arizona.c
@@ -137,15 +137,10 @@ static int arizona_gpio_probe(struct platform_device *pdev)
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
ret);
- goto err;
+ return ret;
}
- platform_set_drvdata(pdev, arizona_gpio);
-
- return ret;
-
-err:
- return ret;
+ return 0;
}
static struct platform_driver arizona_gpio_driver = {
diff --git a/drivers/gpio/gpio-axp209.c b/drivers/gpio/gpio-axp209.c
index d9c2a517c6df..4a346b7b4172 100644
--- a/drivers/gpio/gpio-axp209.c
+++ b/drivers/gpio/gpio-axp209.c
@@ -64,13 +64,9 @@ static int axp20x_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct axp20x_gpio *gpio = gpiochip_get_data(chip);
unsigned int val;
- int reg, ret;
-
- reg = axp20x_gpio_get_reg(offset);
- if (reg < 0)
- return reg;
+ int ret;
- ret = regmap_read(gpio->regmap, reg, &val);
+ ret = regmap_read(gpio->regmap, AXP20X_GPIO20_SS, &val);
if (ret)
return ret;
diff --git a/drivers/gpio/gpio-crystalcove.c b/drivers/gpio/gpio-crystalcove.c
index 7c446d118cd6..2197368cc899 100644
--- a/drivers/gpio/gpio-crystalcove.c
+++ b/drivers/gpio/gpio-crystalcove.c
@@ -351,8 +351,8 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
return retval;
}
- gpiochip_irqchip_add(&cg->chip, &crystalcove_irqchip, 0,
- handle_simple_irq, IRQ_TYPE_NONE);
+ gpiochip_irqchip_add_nested(&cg->chip, &crystalcove_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
retval = request_threaded_irq(irq, NULL, crystalcove_gpio_irq_handler,
IRQF_ONESHOT, KBUILD_MODNAME, cg);
@@ -362,6 +362,8 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
return retval;
}
+ gpiochip_set_nested_irqchip(&cg->chip, &crystalcove_irqchip, irq);
+
return 0;
}
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index dd262f00295d..9191056548fe 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -40,6 +40,7 @@ struct davinci_gpio_regs {
typedef struct irq_chip *(*gpio_get_irq_chip_cb_t)(unsigned int irq);
#define BINTEN 0x8 /* GPIO Interrupt Per-Bank Enable Register */
+#define MAX_LABEL_SIZE 20
static void __iomem *gpio_base;
@@ -201,6 +202,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
struct davinci_gpio_regs __iomem *regs;
struct device *dev = &pdev->dev;
struct resource *res;
+ char label[MAX_LABEL_SIZE];
pdata = davinci_gpio_get_pdata(pdev);
if (!pdata) {
@@ -237,7 +239,10 @@ static int davinci_gpio_probe(struct platform_device *pdev)
return PTR_ERR(gpio_base);
for (i = 0, base = 0; base < ngpio; i++, base += 32) {
- chips[i].chip.label = "DaVinci";
+ snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", i);
+ chips[i].chip.label = devm_kstrdup(dev, label, GFP_KERNEL);
+ if (!chips[i].chip.label)
+ return -ENOMEM;
chips[i].chip.direction_input = davinci_direction_in;
chips[i].chip.get = davinci_gpio_get;
diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index f7a60a441e95..5d38b08d1ee2 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -467,7 +467,6 @@ static int dln2_gpio_probe(struct platform_device *pdev)
dln2->gpio.base = -1;
dln2->gpio.ngpio = pins;
dln2->gpio.can_sleep = true;
- dln2->gpio.irq_not_threaded = true;
dln2->gpio.set = dln2_gpio_set;
dln2->gpio.get = dln2_gpio_get;
dln2->gpio.request = dln2_gpio_request;
diff --git a/drivers/gpio/gpio-etraxfs.c b/drivers/gpio/gpio-etraxfs.c
index 00b022c9acb3..a254d5b07b94 100644
--- a/drivers/gpio/gpio-etraxfs.c
+++ b/drivers/gpio/gpio-etraxfs.c
@@ -471,9 +471,4 @@ static struct platform_driver etraxfs_gpio_driver = {
.probe = etraxfs_gpio_probe,
};
-static int __init etraxfs_gpio_init(void)
-{
- return platform_driver_register(&etraxfs_gpio_driver);
-}
-
-device_initcall(etraxfs_gpio_init);
+builtin_platform_driver(etraxfs_gpio_driver);
diff --git a/drivers/gpio/gpio-htc-egpio.c b/drivers/gpio/gpio-htc-egpio.c
index 0b4df6051097..271356effb2e 100644
--- a/drivers/gpio/gpio-htc-egpio.c
+++ b/drivers/gpio/gpio-htc-egpio.c
@@ -17,7 +17,7 @@
#include <linux/platform_data/gpio-htc-egpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <linux/module.h>
+#include <linux/init.h>
struct egpio_chip {
int reg_start;
@@ -160,10 +160,14 @@ static int egpio_get(struct gpio_chip *chip, unsigned offset)
bit = egpio_bit(ei, offset);
reg = egpio->reg_start + egpio_pos(ei, offset);
- value = egpio_readw(ei, reg);
- pr_debug("readw(%p + %x) = %x\n",
- ei->base_addr, reg << ei->bus_shift, value);
- return !!(value & bit);
+ if (test_bit(offset, &egpio->is_out)) {
+ return !!(egpio->cached_values & (1 << offset));
+ } else {
+ value = egpio_readw(ei, reg);
+ pr_debug("readw(%p + %x) = %x\n",
+ ei->base_addr, reg << ei->bus_shift, value);
+ return !!(value & bit);
+ }
}
static int egpio_direction_input(struct gpio_chip *chip, unsigned offset)
@@ -225,6 +229,15 @@ static int egpio_direction_output(struct gpio_chip *chip,
}
}
+static int egpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+ struct egpio_chip *egpio;
+
+ egpio = gpiochip_get_data(chip);
+
+ return !test_bit(offset, &egpio->is_out);
+}
+
static void egpio_write_cache(struct egpio_info *ei)
{
int i;
@@ -327,6 +340,7 @@ static int __init egpio_probe(struct platform_device *pdev)
chip->set = egpio_set;
chip->direction_input = egpio_direction_input;
chip->direction_output = egpio_direction_output;
+ chip->get_direction = egpio_get_direction;
chip->base = pdata->chip[i].gpio_base;
chip->ngpio = pdata->chip[i].num_gpios;
@@ -367,24 +381,6 @@ fail:
return ret;
}
-static int __exit egpio_remove(struct platform_device *pdev)
-{
- struct egpio_info *ei = platform_get_drvdata(pdev);
- unsigned int irq, irq_end;
-
- if (ei->chained_irq) {
- irq_end = ei->irq_start + ei->nirqs;
- for (irq = ei->irq_start; irq < irq_end; irq++) {
- irq_set_chip_and_handler(irq, NULL, NULL);
- irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
- }
- irq_set_chained_handler(ei->chained_irq, NULL);
- device_init_wakeup(&pdev->dev, 0);
- }
-
- return 0;
-}
-
#ifdef CONFIG_PM
static int egpio_suspend(struct platform_device *pdev, pm_message_t state)
{
@@ -416,8 +412,8 @@ static int egpio_resume(struct platform_device *pdev)
static struct platform_driver egpio_driver = {
.driver = {
.name = "htc-egpio",
+ .suppress_bind_attrs = true,
},
- .remove = __exit_p(egpio_remove),
.suspend = egpio_suspend,
.resume = egpio_resume,
};
@@ -426,15 +422,5 @@ static int __init egpio_init(void)
{
return platform_driver_probe(&egpio_driver, egpio_probe);
}
-
-static void __exit egpio_exit(void)
-{
- platform_driver_unregister(&egpio_driver);
-}
-
/* start early for dependencies */
subsys_initcall(egpio_init);
-module_exit(egpio_exit)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Kevin O'Connor <kevin@koconnor.net>");
diff --git a/drivers/gpio/gpio-intel-mid.c b/drivers/gpio/gpio-intel-mid.c
index 164de64b11fc..a1e44c221f66 100644
--- a/drivers/gpio/gpio-intel-mid.c
+++ b/drivers/gpio/gpio-intel-mid.c
@@ -421,9 +421,4 @@ static struct pci_driver intel_gpio_driver = {
},
};
-static int __init intel_gpio_init(void)
-{
- return pci_register_driver(&intel_gpio_driver);
-}
-
-device_initcall(intel_gpio_init);
+builtin_pci_driver(intel_gpio_driver);
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index a9aaf9d822b4..4ea4c6a1313b 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -520,20 +520,19 @@ static int max732x_irq_setup(struct max732x_chip *chip,
client->irq);
return ret;
}
- ret = gpiochip_irqchip_add(&chip->gpio_chip,
- &max732x_irq_chip,
- irq_base,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add_nested(&chip->gpio_chip,
+ &max732x_irq_chip,
+ irq_base,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (ret) {
dev_err(&client->dev,
"could not connect irqchip to gpiochip\n");
return ret;
}
- gpiochip_set_chained_irqchip(&chip->gpio_chip,
- &max732x_irq_chip,
- client->irq,
- NULL);
+ gpiochip_set_nested_irqchip(&chip->gpio_chip,
+ &max732x_irq_chip,
+ client->irq);
}
return 0;
diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c
index b46b436cb97f..ec8de4190db9 100644
--- a/drivers/gpio/gpio-max77620.c
+++ b/drivers/gpio/gpio-max77620.c
@@ -21,9 +21,6 @@ struct max77620_gpio {
struct gpio_chip gpio_chip;
struct regmap *rmap;
struct device *dev;
- int gpio_irq;
- int irq_base;
- int gpio_base;
};
static const struct regmap_irq max77620_gpio_irqs[] = {
@@ -254,7 +251,6 @@ static int max77620_gpio_probe(struct platform_device *pdev)
mgpio->rmap = chip->rmap;
mgpio->dev = &pdev->dev;
- mgpio->gpio_irq = gpio_irq;
mgpio->gpio_chip.label = pdev->name;
mgpio->gpio_chip.parent = &pdev->dev;
@@ -268,7 +264,6 @@ static int max77620_gpio_probe(struct platform_device *pdev)
mgpio->gpio_chip.ngpio = MAX77620_GPIO_NR;
mgpio->gpio_chip.can_sleep = 1;
mgpio->gpio_chip.base = -1;
- mgpio->irq_base = -1;
#ifdef CONFIG_OF_GPIO
mgpio->gpio_chip.of_node = pdev->dev.parent->of_node;
#endif
@@ -281,9 +276,8 @@ static int max77620_gpio_probe(struct platform_device *pdev)
return ret;
}
- mgpio->gpio_base = mgpio->gpio_chip.base;
- ret = devm_regmap_add_irq_chip(&pdev->dev, chip->rmap, mgpio->gpio_irq,
- IRQF_ONESHOT, mgpio->irq_base,
+ ret = devm_regmap_add_irq_chip(&pdev->dev, chip->rmap, gpio_irq,
+ IRQF_ONESHOT, -1,
&max77620_gpio_irq_chip,
&chip->gpio_irq_data);
if (ret < 0) {
@@ -296,6 +290,7 @@ static int max77620_gpio_probe(struct platform_device *pdev)
static const struct platform_device_id max77620_gpio_devtype[] = {
{ .name = "max77620-gpio", },
+ { .name = "max20024-gpio", },
{},
};
MODULE_DEVICE_TABLE(platform, max77620_gpio_devtype);
diff --git a/drivers/gpio/gpio-mb86s7x.c b/drivers/gpio/gpio-mb86s7x.c
index d55af50e7034..ffb73f688ae1 100644
--- a/drivers/gpio/gpio-mb86s7x.c
+++ b/drivers/gpio/gpio-mb86s7x.c
@@ -217,8 +217,4 @@ static struct platform_driver mb86s70_gpio_driver = {
.remove = mb86s70_gpio_remove,
};
-static int __init mb86s70_gpio_init(void)
-{
- return platform_driver_register(&mb86s70_gpio_driver);
-}
-device_initcall(mb86s70_gpio_init);
+builtin_platform_driver(mb86s70_gpio_driver);
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index 99d37b56c258..504550665091 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -473,21 +473,20 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
return err;
}
- err = gpiochip_irqchip_add(chip,
- &mcp23s08_irq_chip,
- 0,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ err = gpiochip_irqchip_add_nested(chip,
+ &mcp23s08_irq_chip,
+ 0,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (err) {
dev_err(chip->parent,
"could not connect irqchip to gpiochip: %d\n", err);
return err;
}
- gpiochip_set_chained_irqchip(chip,
- &mcp23s08_irq_chip,
- mcp->irq,
- NULL);
+ gpiochip_set_nested_irqchip(chip,
+ &mcp23s08_irq_chip,
+ mcp->irq);
return 0;
}
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c
index 45b51278b8ee..69e0f4ace465 100644
--- a/drivers/gpio/gpio-merrifield.c
+++ b/drivers/gpio/gpio-merrifield.c
@@ -11,6 +11,7 @@
#include <linux/bitops.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -161,6 +162,34 @@ static int mrfld_gpio_direction_output(struct gpio_chip *chip,
return 0;
}
+static int mrfld_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
+
+ return (readl(gpdr) & BIT(offset % 32)) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
+}
+
+static int mrfld_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
+ unsigned int debounce)
+{
+ struct mrfld_gpio *priv = gpiochip_get_data(chip);
+ void __iomem *gfbr = gpio_reg(chip, offset, GFBR);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&priv->lock, flags);
+
+ if (debounce)
+ value = readl(gfbr) & ~BIT(offset % 32);
+ else
+ value = readl(gfbr) | BIT(offset % 32);
+ writel(value, gfbr);
+
+ raw_spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
static void mrfld_irq_ack(struct irq_data *d)
{
struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
@@ -384,6 +413,8 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
priv->chip.direction_output = mrfld_gpio_direction_output;
priv->chip.get = mrfld_gpio_get;
priv->chip.set = mrfld_gpio_set;
+ priv->chip.get_direction = mrfld_gpio_get_direction;
+ priv->chip.set_debounce = mrfld_gpio_set_debounce;
priv->chip.base = gpio_base;
priv->chip.ngpio = MRFLD_NGPIO;
priv->chip.can_sleep = false;
@@ -411,7 +442,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
}
retval = gpiochip_irqchip_add(&priv->chip, &mrfld_irqchip, irq_base,
- handle_simple_irq, IRQ_TYPE_NONE);
+ handle_bad_irq, IRQ_TYPE_NONE);
if (retval) {
dev_err(&pdev->dev, "could not connect irqchip to gpiochip\n");
return retval;
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index ee1724806f46..1e8fde8cb803 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -87,10 +87,15 @@ static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
u32 val;
u32 pin_mask = 1 << d->hwirq;
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct mxs_gpio_port *port = gc->private;
void __iomem *pin_addr;
int edge;
+ if (!(ct->type & type))
+ if (irq_setup_alt_chip(d, type))
+ return -EINVAL;
+
port->both_edges &= ~pin_mask;
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
@@ -119,10 +124,13 @@ static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
/* set level or edge */
pin_addr = port->base + PINCTRL_IRQLEV(port);
- if (edge & GPIO_INT_LEV_MASK)
+ if (edge & GPIO_INT_LEV_MASK) {
writel(pin_mask, pin_addr + MXS_SET);
- else
+ writel(pin_mask, port->base + PINCTRL_IRQEN(port) + MXS_SET);
+ } else {
writel(pin_mask, pin_addr + MXS_CLR);
+ writel(pin_mask, port->base + PINCTRL_PIN2IRQ(port) + MXS_SET);
+ }
/* set polarity */
pin_addr = port->base + PINCTRL_IRQPOL(port);
@@ -202,21 +210,37 @@ static int __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
- gc = irq_alloc_generic_chip("gpio-mxs", 1, irq_base,
+ gc = irq_alloc_generic_chip("gpio-mxs", 2, irq_base,
port->base, handle_level_irq);
if (!gc)
return -ENOMEM;
gc->private = port;
- ct = gc->chip_types;
+ ct = &gc->chip_types[0];
+ ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
+ ct->chip.irq_ack = irq_gc_ack_set_bit;
+ ct->chip.irq_mask = irq_gc_mask_disable_reg;
+ ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
+ ct->chip.irq_set_type = mxs_gpio_set_irq_type;
+ ct->chip.irq_set_wake = mxs_gpio_set_wake_irq;
+ ct->chip.flags = IRQCHIP_SET_TYPE_MASKED;
+ ct->regs.ack = PINCTRL_IRQSTAT(port) + MXS_CLR;
+ ct->regs.enable = PINCTRL_PIN2IRQ(port) + MXS_SET;
+ ct->regs.disable = PINCTRL_PIN2IRQ(port) + MXS_CLR;
+
+ ct = &gc->chip_types[1];
+ ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
ct->chip.irq_ack = irq_gc_ack_set_bit;
- ct->chip.irq_mask = irq_gc_mask_clr_bit;
- ct->chip.irq_unmask = irq_gc_mask_set_bit;
+ ct->chip.irq_mask = irq_gc_mask_disable_reg;
+ ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
ct->chip.irq_set_type = mxs_gpio_set_irq_type;
ct->chip.irq_set_wake = mxs_gpio_set_wake_irq;
+ ct->chip.flags = IRQCHIP_SET_TYPE_MASKED;
ct->regs.ack = PINCTRL_IRQSTAT(port) + MXS_CLR;
- ct->regs.mask = PINCTRL_IRQEN(port);
+ ct->regs.enable = PINCTRL_IRQEN(port) + MXS_SET;
+ ct->regs.disable = PINCTRL_IRQEN(port) + MXS_CLR;
+ ct->handler = handle_level_irq;
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
IRQ_NOREQUEST, 0);
@@ -297,11 +321,8 @@ static int mxs_gpio_probe(struct platform_device *pdev)
}
port->base = base;
- /*
- * select the pin interrupt functionality but initially
- * disable the interrupts
- */
- writel(~0U, port->base + PINCTRL_PIN2IRQ(port));
+ /* initially disable the interrupts */
+ writel(0, port->base + PINCTRL_PIN2IRQ(port));
writel(0, port->base + PINCTRL_IRQEN(port));
/* clear address has to be used to clear IRQSTAT bits */
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index fe731f094257..d5d72d84b719 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -74,6 +74,7 @@ static const struct i2c_device_id pca953x_id[] = {
{ "max7312", 16 | PCA953X_TYPE | PCA_INT, },
{ "max7313", 16 | PCA953X_TYPE | PCA_INT, },
{ "max7315", 8 | PCA953X_TYPE | PCA_INT, },
+ { "max7318", 16 | PCA953X_TYPE | PCA_INT, },
{ "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
@@ -635,20 +636,20 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
return ret;
}
- ret = gpiochip_irqchip_add(&chip->gpio_chip,
- &pca953x_irq_chip,
- irq_base,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add_nested(&chip->gpio_chip,
+ &pca953x_irq_chip,
+ irq_base,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (ret) {
dev_err(&client->dev,
"could not connect irqchip to gpiochip\n");
return ret;
}
- gpiochip_set_chained_irqchip(&chip->gpio_chip,
- &pca953x_irq_chip,
- client->irq, NULL);
+ gpiochip_set_nested_irqchip(&chip->gpio_chip,
+ &pca953x_irq_chip,
+ client->irq);
}
return 0;
@@ -907,6 +908,7 @@ static const struct of_device_id pca953x_dt_ids[] = {
{ .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
{ .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },
{ .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), },
+ { .compatible = "maxim,max7318", .data = OF_953X(16, PCA_INT), },
{ .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), },
{ .compatible = "ti,pca9536", .data = OF_953X( 4, 0), },
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index d168410e2338..895af42a4513 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -378,9 +378,10 @@ static int pcf857x_probe(struct i2c_client *client,
/* Enable irqchip if we have an interrupt */
if (client->irq) {
- status = gpiochip_irqchip_add(&gpio->chip, &pcf857x_irq_chip,
- 0, handle_level_irq,
- IRQ_TYPE_NONE);
+ status = gpiochip_irqchip_add_nested(&gpio->chip,
+ &pcf857x_irq_chip,
+ 0, handle_level_irq,
+ IRQ_TYPE_NONE);
if (status) {
dev_err(&client->dev, "cannot add irqchip\n");
goto fail;
@@ -393,8 +394,8 @@ static int pcf857x_probe(struct i2c_client *client,
if (status)
goto fail;
- gpiochip_set_chained_irqchip(&gpio->chip, &pcf857x_irq_chip,
- client->irq, NULL);
+ gpiochip_set_nested_irqchip(&gpio->chip, &pcf857x_irq_chip,
+ client->irq);
gpio->irq_parent = client->irq;
}
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 6e3c1430616f..0a6bfd2b06e5 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -23,7 +23,6 @@
#include <linux/gpio.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
-#include <linux/amba/pl061.h>
#include <linux/slab.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm.h>
@@ -50,11 +49,12 @@ struct pl061_context_save_regs {
};
#endif
-struct pl061_gpio {
+struct pl061 {
spinlock_t lock;
void __iomem *base;
struct gpio_chip gc;
+ int parent_irq;
#ifdef CONFIG_PM
struct pl061_context_save_regs csave_regs;
@@ -63,22 +63,22 @@ struct pl061_gpio {
static int pl061_get_direction(struct gpio_chip *gc, unsigned offset)
{
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
- return !(readb(chip->base + GPIODIR) & BIT(offset));
+ return !(readb(pl061->base + GPIODIR) & BIT(offset));
}
static int pl061_direction_input(struct gpio_chip *gc, unsigned offset)
{
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
unsigned long flags;
unsigned char gpiodir;
- spin_lock_irqsave(&chip->lock, flags);
- gpiodir = readb(chip->base + GPIODIR);
+ spin_lock_irqsave(&pl061->lock, flags);
+ gpiodir = readb(pl061->base + GPIODIR);
gpiodir &= ~(BIT(offset));
- writeb(gpiodir, chip->base + GPIODIR);
- spin_unlock_irqrestore(&chip->lock, flags);
+ writeb(gpiodir, pl061->base + GPIODIR);
+ spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
@@ -86,44 +86,44 @@ static int pl061_direction_input(struct gpio_chip *gc, unsigned offset)
static int pl061_direction_output(struct gpio_chip *gc, unsigned offset,
int value)
{
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
unsigned long flags;
unsigned char gpiodir;
- spin_lock_irqsave(&chip->lock, flags);
- writeb(!!value << offset, chip->base + (BIT(offset + 2)));
- gpiodir = readb(chip->base + GPIODIR);
+ spin_lock_irqsave(&pl061->lock, flags);
+ writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
+ gpiodir = readb(pl061->base + GPIODIR);
gpiodir |= BIT(offset);
- writeb(gpiodir, chip->base + GPIODIR);
+ writeb(gpiodir, pl061->base + GPIODIR);
/*
* gpio value is set again, because pl061 doesn't allow to set value of
* a gpio pin before configuring it in OUT mode.
*/
- writeb(!!value << offset, chip->base + (BIT(offset + 2)));
- spin_unlock_irqrestore(&chip->lock, flags);
+ writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
+ spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
static int pl061_get_value(struct gpio_chip *gc, unsigned offset)
{
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
- return !!readb(chip->base + (BIT(offset + 2)));
+ return !!readb(pl061->base + (BIT(offset + 2)));
}
static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value)
{
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
- writeb(!!value << offset, chip->base + (BIT(offset + 2)));
+ writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
}
static int pl061_irq_type(struct irq_data *d, unsigned trigger)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
int offset = irqd_to_hwirq(d);
unsigned long flags;
u8 gpiois, gpioibe, gpioiev;
@@ -143,11 +143,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
}
- spin_lock_irqsave(&chip->lock, flags);
+ spin_lock_irqsave(&pl061->lock, flags);
- gpioiev = readb(chip->base + GPIOIEV);
- gpiois = readb(chip->base + GPIOIS);
- gpioibe = readb(chip->base + GPIOIBE);
+ gpioiev = readb(pl061->base + GPIOIEV);
+ gpiois = readb(pl061->base + GPIOIS);
+ gpioibe = readb(pl061->base + GPIOIBE);
if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
bool polarity = trigger & IRQ_TYPE_LEVEL_HIGH;
@@ -199,11 +199,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
offset);
}
- writeb(gpiois, chip->base + GPIOIS);
- writeb(gpioibe, chip->base + GPIOIBE);
- writeb(gpioiev, chip->base + GPIOIEV);
+ writeb(gpiois, pl061->base + GPIOIS);
+ writeb(gpioibe, pl061->base + GPIOIBE);
+ writeb(gpioiev, pl061->base + GPIOIEV);
- spin_unlock_irqrestore(&chip->lock, flags);
+ spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
@@ -213,12 +213,12 @@ static void pl061_irq_handler(struct irq_desc *desc)
unsigned long pending;
int offset;
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
struct irq_chip *irqchip = irq_desc_get_chip(desc);
chained_irq_enter(irqchip, desc);
- pending = readb(chip->base + GPIOMIS);
+ pending = readb(pl061->base + GPIOMIS);
if (pending) {
for_each_set_bit(offset, &pending, PL061_GPIO_NR)
generic_handle_irq(irq_find_mapping(gc->irqdomain,
@@ -231,27 +231,27 @@ static void pl061_irq_handler(struct irq_desc *desc)
static void pl061_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
u8 gpioie;
- spin_lock(&chip->lock);
- gpioie = readb(chip->base + GPIOIE) & ~mask;
- writeb(gpioie, chip->base + GPIOIE);
- spin_unlock(&chip->lock);
+ spin_lock(&pl061->lock);
+ gpioie = readb(pl061->base + GPIOIE) & ~mask;
+ writeb(gpioie, pl061->base + GPIOIE);
+ spin_unlock(&pl061->lock);
}
static void pl061_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
u8 gpioie;
- spin_lock(&chip->lock);
- gpioie = readb(chip->base + GPIOIE) | mask;
- writeb(gpioie, chip->base + GPIOIE);
- spin_unlock(&chip->lock);
+ spin_lock(&pl061->lock);
+ gpioie = readb(pl061->base + GPIOIE) | mask;
+ writeb(gpioie, pl061->base + GPIOIE);
+ spin_unlock(&pl061->lock);
}
/**
@@ -265,19 +265,20 @@ static void pl061_irq_unmask(struct irq_data *d)
static void pl061_irq_ack(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct pl061_gpio *chip = gpiochip_get_data(gc);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
- spin_lock(&chip->lock);
- writeb(mask, chip->base + GPIOIC);
- spin_unlock(&chip->lock);
+ spin_lock(&pl061->lock);
+ writeb(mask, pl061->base + GPIOIC);
+ spin_unlock(&pl061->lock);
}
static int pl061_irq_set_wake(struct irq_data *d, unsigned int state)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct pl061 *pl061 = gpiochip_get_data(gc);
- return irq_set_irq_wake(gc->irq_parent, state);
+ return irq_set_irq_wake(pl061->parent_irq, state);
}
static struct irq_chip pl061_irqchip = {
@@ -292,81 +293,60 @@ static struct irq_chip pl061_irqchip = {
static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
{
struct device *dev = &adev->dev;
- struct pl061_platform_data *pdata = dev_get_platdata(dev);
- struct pl061_gpio *chip;
- int ret, irq, i, irq_base;
+ struct pl061 *pl061;
+ int ret, irq;
- chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
- if (chip == NULL)
+ pl061 = devm_kzalloc(dev, sizeof(*pl061), GFP_KERNEL);
+ if (pl061 == NULL)
return -ENOMEM;
- if (pdata) {
- chip->gc.base = pdata->gpio_base;
- irq_base = pdata->irq_base;
- if (irq_base <= 0) {
- dev_err(&adev->dev, "invalid IRQ base in pdata\n");
- return -ENODEV;
- }
- } else {
- chip->gc.base = -1;
- irq_base = 0;
- }
-
- chip->base = devm_ioremap_resource(dev, &adev->res);
- if (IS_ERR(chip->base))
- return PTR_ERR(chip->base);
+ pl061->base = devm_ioremap_resource(dev, &adev->res);
+ if (IS_ERR(pl061->base))
+ return PTR_ERR(pl061->base);
- spin_lock_init(&chip->lock);
+ spin_lock_init(&pl061->lock);
if (of_property_read_bool(dev->of_node, "gpio-ranges")) {
- chip->gc.request = gpiochip_generic_request;
- chip->gc.free = gpiochip_generic_free;
+ pl061->gc.request = gpiochip_generic_request;
+ pl061->gc.free = gpiochip_generic_free;
}
- chip->gc.get_direction = pl061_get_direction;
- chip->gc.direction_input = pl061_direction_input;
- chip->gc.direction_output = pl061_direction_output;
- chip->gc.get = pl061_get_value;
- chip->gc.set = pl061_set_value;
- chip->gc.ngpio = PL061_GPIO_NR;
- chip->gc.label = dev_name(dev);
- chip->gc.parent = dev;
- chip->gc.owner = THIS_MODULE;
-
- ret = gpiochip_add_data(&chip->gc, chip);
+ pl061->gc.base = -1;
+ pl061->gc.get_direction = pl061_get_direction;
+ pl061->gc.direction_input = pl061_direction_input;
+ pl061->gc.direction_output = pl061_direction_output;
+ pl061->gc.get = pl061_get_value;
+ pl061->gc.set = pl061_set_value;
+ pl061->gc.ngpio = PL061_GPIO_NR;
+ pl061->gc.label = dev_name(dev);
+ pl061->gc.parent = dev;
+ pl061->gc.owner = THIS_MODULE;
+
+ ret = gpiochip_add_data(&pl061->gc, pl061);
if (ret)
return ret;
/*
* irq_chip support
*/
- writeb(0, chip->base + GPIOIE); /* disable irqs */
+ writeb(0, pl061->base + GPIOIE); /* disable irqs */
irq = adev->irq[0];
if (irq < 0) {
dev_err(&adev->dev, "invalid IRQ\n");
return -ENODEV;
}
+ pl061->parent_irq = irq;
- ret = gpiochip_irqchip_add(&chip->gc, &pl061_irqchip,
- irq_base, handle_bad_irq,
+ ret = gpiochip_irqchip_add(&pl061->gc, &pl061_irqchip,
+ 0, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
dev_info(&adev->dev, "could not add irqchip\n");
return ret;
}
- gpiochip_set_chained_irqchip(&chip->gc, &pl061_irqchip,
+ gpiochip_set_chained_irqchip(&pl061->gc, &pl061_irqchip,
irq, pl061_irq_handler);
- for (i = 0; i < PL061_GPIO_NR; i++) {
- if (pdata) {
- if (pdata->directions & (BIT(i)))
- pl061_direction_output(&chip->gc, i,
- pdata->values & (BIT(i)));
- else
- pl061_direction_input(&chip->gc, i);
- }
- }
-
- amba_set_drvdata(adev, chip);
+ amba_set_drvdata(adev, pl061);
dev_info(&adev->dev, "PL061 GPIO chip @%pa registered\n",
&adev->res.start);
@@ -376,20 +356,20 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
#ifdef CONFIG_PM
static int pl061_suspend(struct device *dev)
{
- struct pl061_gpio *chip = dev_get_drvdata(dev);
+ struct pl061 *pl061 = dev_get_drvdata(dev);
int offset;
- chip->csave_regs.gpio_data = 0;
- chip->csave_regs.gpio_dir = readb(chip->base + GPIODIR);
- chip->csave_regs.gpio_is = readb(chip->base + GPIOIS);
- chip->csave_regs.gpio_ibe = readb(chip->base + GPIOIBE);
- chip->csave_regs.gpio_iev = readb(chip->base + GPIOIEV);
- chip->csave_regs.gpio_ie = readb(chip->base + GPIOIE);
+ pl061->csave_regs.gpio_data = 0;
+ pl061->csave_regs.gpio_dir = readb(pl061->base + GPIODIR);
+ pl061->csave_regs.gpio_is = readb(pl061->base + GPIOIS);
+ pl061->csave_regs.gpio_ibe = readb(pl061->base + GPIOIBE);
+ pl061->csave_regs.gpio_iev = readb(pl061->base + GPIOIEV);
+ pl061->csave_regs.gpio_ie = readb(pl061->base + GPIOIE);
for (offset = 0; offset < PL061_GPIO_NR; offset++) {
- if (chip->csave_regs.gpio_dir & (BIT(offset)))
- chip->csave_regs.gpio_data |=
- pl061_get_value(&chip->gc, offset) << offset;
+ if (pl061->csave_regs.gpio_dir & (BIT(offset)))
+ pl061->csave_regs.gpio_data |=
+ pl061_get_value(&pl061->gc, offset) << offset;
}
return 0;
@@ -397,22 +377,22 @@ static int pl061_suspend(struct device *dev)
static int pl061_resume(struct device *dev)
{
- struct pl061_gpio *chip = dev_get_drvdata(dev);
+ struct pl061 *pl061 = dev_get_drvdata(dev);
int offset;
for (offset = 0; offset < PL061_GPIO_NR; offset++) {
- if (chip->csave_regs.gpio_dir & (BIT(offset)))
- pl061_direction_output(&chip->gc, offset,
- chip->csave_regs.gpio_data &
+ if (pl061->csave_regs.gpio_dir & (BIT(offset)))
+ pl061_direction_output(&pl061->gc, offset,
+ pl061->csave_regs.gpio_data &
(BIT(offset)));
else
- pl061_direction_input(&chip->gc, offset);
+ pl061_direction_input(&pl061->gc, offset);
}
- writeb(chip->csave_regs.gpio_is, chip->base + GPIOIS);
- writeb(chip->csave_regs.gpio_ibe, chip->base + GPIOIBE);
- writeb(chip->csave_regs.gpio_iev, chip->base + GPIOIEV);
- writeb(chip->csave_regs.gpio_ie, chip->base + GPIOIE);
+ writeb(pl061->csave_regs.gpio_is, pl061->base + GPIOIS);
+ writeb(pl061->csave_regs.gpio_ibe, pl061->base + GPIOIBE);
+ writeb(pl061->csave_regs.gpio_iev, pl061->base + GPIOIEV);
+ writeb(pl061->csave_regs.gpio_ie, pl061->base + GPIOIE);
return 0;
}
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 5b0042776ec7..16cbc5702865 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -413,7 +413,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
stmpe->partnum != STMPE1801) {
stmpe_reg_write(stmpe, statmsbreg + i, status[i]);
stmpe_reg_write(stmpe,
- stmpe->regs[STMPE_IDX_GPEDR_LSB + i],
+ stmpe->regs[STMPE_IDX_GPEDR_MSB] + i,
status[i]);
}
}
@@ -484,21 +484,20 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
if (stmpe_gpio->norequest_mask & BIT(i))
clear_bit(i, stmpe_gpio->chip.irq_valid_mask);
}
- ret = gpiochip_irqchip_add(&stmpe_gpio->chip,
- &stmpe_gpio_irq_chip,
- 0,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add_nested(&stmpe_gpio->chip,
+ &stmpe_gpio_irq_chip,
+ 0,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (ret) {
dev_err(&pdev->dev,
"could not connect irqchip to gpiochip\n");
goto out_disable;
}
- gpiochip_set_chained_irqchip(&stmpe_gpio->chip,
- &stmpe_gpio_irq_chip,
- irq,
- NULL);
+ gpiochip_set_nested_irqchip(&stmpe_gpio->chip,
+ &stmpe_gpio_irq_chip,
+ irq);
}
platform_set_drvdata(pdev, stmpe_gpio);
diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
deleted file mode 100644
index af95de89db01..000000000000
--- a/drivers/gpio/gpio-sx150x.c
+++ /dev/null
@@ -1,792 +0,0 @@
-/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
- *
- * Driver for Semtech SX150X I2C GPIO Expanders
- *
- * Author: Gregory Bean <gbean@codeaurora.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/of_gpio.h>
-#include <linux/of_device.h>
-
-#define NO_UPDATE_PENDING -1
-
-/* The chip models of sx150x */
-#define SX150X_123 0
-#define SX150X_456 1
-#define SX150X_789 2
-
-struct sx150x_123_pri {
- u8 reg_pld_mode;
- u8 reg_pld_table0;
- u8 reg_pld_table1;
- u8 reg_pld_table2;
- u8 reg_pld_table3;
- u8 reg_pld_table4;
- u8 reg_advance;
-};
-
-struct sx150x_456_pri {
- u8 reg_pld_mode;
- u8 reg_pld_table0;
- u8 reg_pld_table1;
- u8 reg_pld_table2;
- u8 reg_pld_table3;
- u8 reg_pld_table4;
- u8 reg_advance;
-};
-
-struct sx150x_789_pri {
- u8 reg_drain;
- u8 reg_polarity;
- u8 reg_clock;
- u8 reg_misc;
- u8 reg_reset;
- u8 ngpios;
-};
-
-struct sx150x_device_data {
- u8 model;
- u8 reg_pullup;
- u8 reg_pulldn;
- u8 reg_dir;
- u8 reg_data;
- u8 reg_irq_mask;
- u8 reg_irq_src;
- u8 reg_sense;
- u8 ngpios;
- union {
- struct sx150x_123_pri x123;
- struct sx150x_456_pri x456;
- struct sx150x_789_pri x789;
- } pri;
-};
-
-/**
- * struct sx150x_platform_data - config data for SX150x driver
- * @gpio_base: The index number of the first GPIO assigned to this
- * GPIO expander. The expander will create a block of
- * consecutively numbered gpios beginning at the given base,
- * with the size of the block depending on the model of the
- * expander chip.
- * @oscio_is_gpo: If set to true, the driver will configure OSCIO as a GPO
- * instead of as an oscillator, increasing the size of the
- * GP(I)O pool created by this expander by one. The
- * output-only GPO pin will be added at the end of the block.
- * @io_pullup_ena: A bit-mask which enables or disables the pull-up resistor
- * for each IO line in the expander. Setting the bit at
- * position n will enable the pull-up for the IO at
- * the corresponding offset. For chips with fewer than
- * 16 IO pins, high-end bits are ignored.
- * @io_pulldn_ena: A bit-mask which enables-or disables the pull-down
- * resistor for each IO line in the expander. Setting the
- * bit at position n will enable the pull-down for the IO at
- * the corresponding offset. For chips with fewer than
- * 16 IO pins, high-end bits are ignored.
- * @io_polarity: A bit-mask which enables polarity inversion for each IO line
- * in the expander. Setting the bit at position n inverts
- * the polarity of that IO line, while clearing it results
- * in normal polarity. For chips with fewer than 16 IO pins,
- * high-end bits are ignored.
- * @irq_summary: The 'summary IRQ' line to which the GPIO expander's INT line
- * is connected, via which it reports interrupt events
- * across all GPIO lines. This must be a real,
- * pre-existing IRQ line.
- * Setting this value < 0 disables the irq_chip functionality
- * of the driver.
- * @irq_base: The first 'virtual IRQ' line at which our block of GPIO-based
- * IRQ lines will appear. Similarly to gpio_base, the expander
- * will create a block of irqs beginning at this number.
- * This value is ignored if irq_summary is < 0.
- * @reset_during_probe: If set to true, the driver will trigger a full
- * reset of the chip at the beginning of the probe
- * in order to place it in a known state.
- */
-struct sx150x_platform_data {
- unsigned gpio_base;
- bool oscio_is_gpo;
- u16 io_pullup_ena;
- u16 io_pulldn_ena;
- u16 io_polarity;
- int irq_summary;
- unsigned irq_base;
- bool reset_during_probe;
-};
-
-struct sx150x_chip {
- struct gpio_chip gpio_chip;
- struct i2c_client *client;
- const struct sx150x_device_data *dev_cfg;
- int irq_summary;
- int irq_base;
- int irq_update;
- u32 irq_sense;
- u32 irq_masked;
- u32 dev_sense;
- u32 dev_masked;
- struct irq_chip irq_chip;
- struct mutex lock;
-};
-
-static const struct sx150x_device_data sx150x_devices[] = {
- [0] = { /* sx1508q */
- .model = SX150X_789,
- .reg_pullup = 0x03,
- .reg_pulldn = 0x04,
- .reg_dir = 0x07,
- .reg_data = 0x08,
- .reg_irq_mask = 0x09,
- .reg_irq_src = 0x0c,
- .reg_sense = 0x0b,
- .pri.x789 = {
- .reg_drain = 0x05,
- .reg_polarity = 0x06,
- .reg_clock = 0x0f,
- .reg_misc = 0x10,
- .reg_reset = 0x7d,
- },
- .ngpios = 8,
- },
- [1] = { /* sx1509q */
- .model = SX150X_789,
- .reg_pullup = 0x07,
- .reg_pulldn = 0x09,
- .reg_dir = 0x0f,
- .reg_data = 0x11,
- .reg_irq_mask = 0x13,
- .reg_irq_src = 0x19,
- .reg_sense = 0x17,
- .pri.x789 = {
- .reg_drain = 0x0b,
- .reg_polarity = 0x0d,
- .reg_clock = 0x1e,
- .reg_misc = 0x1f,
- .reg_reset = 0x7d,
- },
- .ngpios = 16
- },
- [2] = { /* sx1506q */
- .model = SX150X_456,
- .reg_pullup = 0x05,
- .reg_pulldn = 0x07,
- .reg_dir = 0x03,
- .reg_data = 0x01,
- .reg_irq_mask = 0x09,
- .reg_irq_src = 0x0f,
- .reg_sense = 0x0d,
- .pri.x456 = {
- .reg_pld_mode = 0x21,
- .reg_pld_table0 = 0x23,
- .reg_pld_table1 = 0x25,
- .reg_pld_table2 = 0x27,
- .reg_pld_table3 = 0x29,
- .reg_pld_table4 = 0x2b,
- .reg_advance = 0xad,
- },
- .ngpios = 16
- },
- [3] = { /* sx1502q */
- .model = SX150X_123,
- .reg_pullup = 0x02,
- .reg_pulldn = 0x03,
- .reg_dir = 0x01,
- .reg_data = 0x00,
- .reg_irq_mask = 0x05,
- .reg_irq_src = 0x08,
- .reg_sense = 0x07,
- .pri.x123 = {
- .reg_pld_mode = 0x10,
- .reg_pld_table0 = 0x11,
- .reg_pld_table1 = 0x12,
- .reg_pld_table2 = 0x13,
- .reg_pld_table3 = 0x14,
- .reg_pld_table4 = 0x15,
- .reg_advance = 0xad,
- },
- .ngpios = 8,
- },
-};
-
-static const struct i2c_device_id sx150x_id[] = {
- {"sx1508q", 0},
- {"sx1509q", 1},
- {"sx1506q", 2},
- {"sx1502q", 3},
- {}
-};
-
-static const struct of_device_id sx150x_of_match[] = {
- { .compatible = "semtech,sx1508q" },
- { .compatible = "semtech,sx1509q" },
- { .compatible = "semtech,sx1506q" },
- { .compatible = "semtech,sx1502q" },
- {},
-};
-
-static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val)
-{
- s32 err = i2c_smbus_write_byte_data(client, reg, val);
-
- if (err < 0)
- dev_warn(&client->dev,
- "i2c write fail: can't write %02x to %02x: %d\n",
- val, reg, err);
- return err;
-}
-
-static s32 sx150x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
-{
- s32 err = i2c_smbus_read_byte_data(client, reg);
-
- if (err >= 0)
- *val = err;
- else
- dev_warn(&client->dev,
- "i2c read fail: can't read from %02x: %d\n",
- reg, err);
- return err;
-}
-
-static inline bool offset_is_oscio(struct sx150x_chip *chip, unsigned offset)
-{
- return (chip->dev_cfg->ngpios == offset);
-}
-
-/*
- * These utility functions solve the common problem of locating and setting
- * configuration bits. Configuration bits are grouped into registers
- * whose indexes increase downwards. For example, with eight-bit registers,
- * sixteen gpios would have their config bits grouped in the following order:
- * REGISTER N-1 [ f e d c b a 9 8 ]
- * N [ 7 6 5 4 3 2 1 0 ]
- *
- * For multi-bit configurations, the pattern gets wider:
- * REGISTER N-3 [ f f e e d d c c ]
- * N-2 [ b b a a 9 9 8 8 ]
- * N-1 [ 7 7 6 6 5 5 4 4 ]
- * N [ 3 3 2 2 1 1 0 0 ]
- *
- * Given the address of the starting register 'N', the index of the gpio
- * whose configuration we seek to change, and the width in bits of that
- * configuration, these functions allow us to locate the correct
- * register and mask the correct bits.
- */
-static inline void sx150x_find_cfg(u8 offset, u8 width,
- u8 *reg, u8 *mask, u8 *shift)
-{
- *reg -= offset * width / 8;
- *mask = (1 << width) - 1;
- *shift = (offset * width) % 8;
- *mask <<= *shift;
-}
-
-static s32 sx150x_write_cfg(struct sx150x_chip *chip,
- u8 offset, u8 width, u8 reg, u8 val)
-{
- u8 mask;
- u8 data;
- u8 shift;
- s32 err;
-
- sx150x_find_cfg(offset, width, &reg, &mask, &shift);
- err = sx150x_i2c_read(chip->client, reg, &data);
- if (err < 0)
- return err;
-
- data &= ~mask;
- data |= (val << shift) & mask;
- return sx150x_i2c_write(chip->client, reg, data);
-}
-
-static int sx150x_get_io(struct sx150x_chip *chip, unsigned offset)
-{
- u8 reg = chip->dev_cfg->reg_data;
- u8 mask;
- u8 data;
- u8 shift;
- s32 err;
-
- sx150x_find_cfg(offset, 1, &reg, &mask, &shift);
- err = sx150x_i2c_read(chip->client, reg, &data);
- if (err >= 0)
- err = (data & mask) != 0 ? 1 : 0;
-
- return err;
-}
-
-static void sx150x_set_oscio(struct sx150x_chip *chip, int val)
-{
- sx150x_i2c_write(chip->client,
- chip->dev_cfg->pri.x789.reg_clock,
- (val ? 0x1f : 0x10));
-}
-
-static void sx150x_set_io(struct sx150x_chip *chip, unsigned offset, int val)
-{
- sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->reg_data,
- (val ? 1 : 0));
-}
-
-static int sx150x_io_input(struct sx150x_chip *chip, unsigned offset)
-{
- return sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->reg_dir,
- 1);
-}
-
-static int sx150x_io_output(struct sx150x_chip *chip, unsigned offset, int val)
-{
- int err;
-
- err = sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->reg_data,
- (val ? 1 : 0));
- if (err >= 0)
- err = sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->reg_dir,
- 0);
- return err;
-}
-
-static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset)
-{
- struct sx150x_chip *chip = gpiochip_get_data(gc);
- int status = -EINVAL;
-
- if (!offset_is_oscio(chip, offset)) {
- mutex_lock(&chip->lock);
- status = sx150x_get_io(chip, offset);
- mutex_unlock(&chip->lock);
- }
-
- return (status < 0) ? status : !!status;
-}
-
-static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val)
-{
- struct sx150x_chip *chip = gpiochip_get_data(gc);
-
- mutex_lock(&chip->lock);
- if (offset_is_oscio(chip, offset))
- sx150x_set_oscio(chip, val);
- else
- sx150x_set_io(chip, offset, val);
- mutex_unlock(&chip->lock);
-}
-
-static int sx150x_gpio_set_single_ended(struct gpio_chip *gc,
- unsigned offset,
- enum single_ended_mode mode)
-{
- struct sx150x_chip *chip = gpiochip_get_data(gc);
-
- /* On the SX160X 789 we can set open drain */
- if (chip->dev_cfg->model != SX150X_789)
- return -ENOTSUPP;
-
- if (mode == LINE_MODE_PUSH_PULL)
- return sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->pri.x789.reg_drain,
- 0);
-
- if (mode == LINE_MODE_OPEN_DRAIN)
- return sx150x_write_cfg(chip,
- offset,
- 1,
- chip->dev_cfg->pri.x789.reg_drain,
- 1);
- return -ENOTSUPP;
-}
-
-static int sx150x_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
-{
- struct sx150x_chip *chip = gpiochip_get_data(gc);
- int status = -EINVAL;
-
- if (!offset_is_oscio(chip, offset)) {
- mutex_lock(&chip->lock);
- status = sx150x_io_input(chip, offset);
- mutex_unlock(&chip->lock);
- }
- return status;
-}
-
-static int sx150x_gpio_direction_output(struct gpio_chip *gc,
- unsigned offset,
- int val)
-{
- struct sx150x_chip *chip = gpiochip_get_data(gc);
- int status = 0;
-
- if (!offset_is_oscio(chip, offset)) {
- mutex_lock(&chip->lock);
- status = sx150x_io_output(chip, offset, val);
- mutex_unlock(&chip->lock);
- }
- return status;
-}
-
-static void sx150x_irq_mask(struct irq_data *d)
-{
- struct sx150x_chip *chip = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned n = d->hwirq;
-
- chip->irq_masked |= (1 << n);
- chip->irq_update = n;
-}
-
-static void sx150x_irq_unmask(struct irq_data *d)
-{
- struct sx150x_chip *chip = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned n = d->hwirq;
-
- chip->irq_masked &= ~(1 << n);
- chip->irq_update = n;
-}
-
-static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type)
-{
- struct sx150x_chip *chip = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned n, val = 0;
-
- if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
- return -EINVAL;
-
- n = d->hwirq;
-
- if (flow_type & IRQ_TYPE_EDGE_RISING)
- val |= 0x1;
- if (flow_type & IRQ_TYPE_EDGE_FALLING)
- val |= 0x2;
-
- chip->irq_sense &= ~(3UL << (n * 2));
- chip->irq_sense |= val << (n * 2);
- chip->irq_update = n;
- return 0;
-}
-
-static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id)
-{
- struct sx150x_chip *chip = (struct sx150x_chip *)dev_id;
- unsigned nhandled = 0;
- unsigned sub_irq;
- unsigned n;
- s32 err;
- u8 val;
- int i;
-
- for (i = (chip->dev_cfg->ngpios / 8) - 1; i >= 0; --i) {
- err = sx150x_i2c_read(chip->client,
- chip->dev_cfg->reg_irq_src - i,
- &val);
- if (err < 0)
- continue;
-
- sx150x_i2c_write(chip->client,
- chip->dev_cfg->reg_irq_src - i,
- val);
- for (n = 0; n < 8; ++n) {
- if (val & (1 << n)) {
- sub_irq = irq_find_mapping(
- chip->gpio_chip.irqdomain,
- (i * 8) + n);
- handle_nested_irq(sub_irq);
- ++nhandled;
- }
- }
- }
-
- return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE);
-}
-
-static void sx150x_irq_bus_lock(struct irq_data *d)
-{
- struct sx150x_chip *chip = gpiochip_get_data(irq_data_get_irq_chip_data(d));
-
- mutex_lock(&chip->lock);
-}
-
-static void sx150x_irq_bus_sync_unlock(struct irq_data *d)
-{
- struct sx150x_chip *chip = gpiochip_get_data(irq_data_get_irq_chip_data(d));
- unsigned n;
-
- if (chip->irq_update == NO_UPDATE_PENDING)
- goto out;
-
- n = chip->irq_update;
- chip->irq_update = NO_UPDATE_PENDING;
-
- /* Avoid updates if nothing changed */
- if (chip->dev_sense == chip->irq_sense &&
- chip->dev_masked == chip->irq_masked)
- goto out;
-
- chip->dev_sense = chip->irq_sense;
- chip->dev_masked = chip->irq_masked;
-
- if (chip->irq_masked & (1 << n)) {
- sx150x_write_cfg(chip, n, 1, chip->dev_cfg->reg_irq_mask, 1);
- sx150x_write_cfg(chip, n, 2, chip->dev_cfg->reg_sense, 0);
- } else {
- sx150x_write_cfg(chip, n, 1, chip->dev_cfg->reg_irq_mask, 0);
- sx150x_write_cfg(chip, n, 2, chip->dev_cfg->reg_sense,
- chip->irq_sense >> (n * 2));
- }
-out:
- mutex_unlock(&chip->lock);
-}
-
-static void sx150x_init_chip(struct sx150x_chip *chip,
- struct i2c_client *client,
- kernel_ulong_t driver_data,
- struct sx150x_platform_data *pdata)
-{
- mutex_init(&chip->lock);
-
- chip->client = client;
- chip->dev_cfg = &sx150x_devices[driver_data];
- chip->gpio_chip.parent = &client->dev;
- chip->gpio_chip.label = client->name;
- chip->gpio_chip.direction_input = sx150x_gpio_direction_input;
- chip->gpio_chip.direction_output = sx150x_gpio_direction_output;
- chip->gpio_chip.get = sx150x_gpio_get;
- chip->gpio_chip.set = sx150x_gpio_set;
- chip->gpio_chip.set_single_ended = sx150x_gpio_set_single_ended;
- chip->gpio_chip.base = pdata->gpio_base;
- chip->gpio_chip.can_sleep = true;
- chip->gpio_chip.ngpio = chip->dev_cfg->ngpios;
-#ifdef CONFIG_OF_GPIO
- chip->gpio_chip.of_node = client->dev.of_node;
- chip->gpio_chip.of_gpio_n_cells = 2;
-#endif
- if (pdata->oscio_is_gpo)
- ++chip->gpio_chip.ngpio;
-
- chip->irq_chip.name = client->name;
- chip->irq_chip.irq_mask = sx150x_irq_mask;
- chip->irq_chip.irq_unmask = sx150x_irq_unmask;
- chip->irq_chip.irq_set_type = sx150x_irq_set_type;
- chip->irq_chip.irq_bus_lock = sx150x_irq_bus_lock;
- chip->irq_chip.irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock;
- chip->irq_summary = -1;
- chip->irq_base = -1;
- chip->irq_masked = ~0;
- chip->irq_sense = 0;
- chip->dev_masked = ~0;
- chip->dev_sense = 0;
- chip->irq_update = NO_UPDATE_PENDING;
-}
-
-static int sx150x_init_io(struct sx150x_chip *chip, u8 base, u16 cfg)
-{
- int err = 0;
- unsigned n;
-
- for (n = 0; err >= 0 && n < (chip->dev_cfg->ngpios / 8); ++n)
- err = sx150x_i2c_write(chip->client, base - n, cfg >> (n * 8));
- return err;
-}
-
-static int sx150x_reset(struct sx150x_chip *chip)
-{
- int err;
-
- err = i2c_smbus_write_byte_data(chip->client,
- chip->dev_cfg->pri.x789.reg_reset,
- 0x12);
- if (err < 0)
- return err;
-
- err = i2c_smbus_write_byte_data(chip->client,
- chip->dev_cfg->pri.x789.reg_reset,
- 0x34);
- return err;
-}
-
-static int sx150x_init_hw(struct sx150x_chip *chip,
- struct sx150x_platform_data *pdata)
-{
- int err = 0;
-
- if (pdata->reset_during_probe) {
- err = sx150x_reset(chip);
- if (err < 0)
- return err;
- }
-
- if (chip->dev_cfg->model == SX150X_789)
- err = sx150x_i2c_write(chip->client,
- chip->dev_cfg->pri.x789.reg_misc,
- 0x01);
- else if (chip->dev_cfg->model == SX150X_456)
- err = sx150x_i2c_write(chip->client,
- chip->dev_cfg->pri.x456.reg_advance,
- 0x04);
- else
- err = sx150x_i2c_write(chip->client,
- chip->dev_cfg->pri.x123.reg_advance,
- 0x00);
- if (err < 0)
- return err;
-
- err = sx150x_init_io(chip, chip->dev_cfg->reg_pullup,
- pdata->io_pullup_ena);
- if (err < 0)
- return err;
-
- err = sx150x_init_io(chip, chip->dev_cfg->reg_pulldn,
- pdata->io_pulldn_ena);
- if (err < 0)
- return err;
-
- if (chip->dev_cfg->model == SX150X_789) {
- err = sx150x_init_io(chip,
- chip->dev_cfg->pri.x789.reg_polarity,
- pdata->io_polarity);
- if (err < 0)
- return err;
- } else if (chip->dev_cfg->model == SX150X_456) {
- /* Set all pins to work in normal mode */
- err = sx150x_init_io(chip,
- chip->dev_cfg->pri.x456.reg_pld_mode,
- 0);
- if (err < 0)
- return err;
- } else {
- /* Set all pins to work in normal mode */
- err = sx150x_init_io(chip,
- chip->dev_cfg->pri.x123.reg_pld_mode,
- 0);
- if (err < 0)
- return err;
- }
-
-
- if (pdata->oscio_is_gpo)
- sx150x_set_oscio(chip, 0);
-
- return err;
-}
-
-static int sx150x_install_irq_chip(struct sx150x_chip *chip,
- int irq_summary,
- int irq_base)
-{
- int err;
-
- chip->irq_summary = irq_summary;
- chip->irq_base = irq_base;
-
- /* Add gpio chip to irq subsystem */
- err = gpiochip_irqchip_add(&chip->gpio_chip,
- &chip->irq_chip, chip->irq_base,
- handle_edge_irq, IRQ_TYPE_EDGE_BOTH);
- if (err) {
- dev_err(&chip->client->dev,
- "could not connect irqchip to gpiochip\n");
- return err;
- }
-
- err = devm_request_threaded_irq(&chip->client->dev,
- irq_summary, NULL, sx150x_irq_thread_fn,
- IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_FALLING,
- chip->irq_chip.name, chip);
- if (err < 0) {
- chip->irq_summary = -1;
- chip->irq_base = -1;
- }
-
- return err;
-}
-
-static int sx150x_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- static const u32 i2c_funcs = I2C_FUNC_SMBUS_BYTE_DATA |
- I2C_FUNC_SMBUS_WRITE_WORD_DATA;
- struct sx150x_platform_data *pdata;
- struct sx150x_chip *chip;
- int rc;
-
- pdata = dev_get_platdata(&client->dev);
- if (!pdata)
- return -EINVAL;
-
- if (!i2c_check_functionality(client->adapter, i2c_funcs))
- return -ENOSYS;
-
- chip = devm_kzalloc(&client->dev,
- sizeof(struct sx150x_chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- sx150x_init_chip(chip, client, id->driver_data, pdata);
- rc = sx150x_init_hw(chip, pdata);
- if (rc < 0)
- return rc;
-
- rc = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip);
- if (rc)
- return rc;
-
- if (pdata->irq_summary >= 0) {
- rc = sx150x_install_irq_chip(chip,
- pdata->irq_summary,
- pdata->irq_base);
- if (rc < 0)
- return rc;
- }
-
- i2c_set_clientdata(client, chip);
-
- return 0;
-}
-
-static struct i2c_driver sx150x_driver = {
- .driver = {
- .name = "sx150x",
- .of_match_table = of_match_ptr(sx150x_of_match),
- },
- .probe = sx150x_probe,
- .id_table = sx150x_id,
-};
-
-static int __init sx150x_init(void)
-{
- return i2c_add_driver(&sx150x_driver);
-}
-subsys_initcall(sx150x_init);
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index d6e21f1a70a9..be97101c2c9a 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -337,21 +337,20 @@ static int tc3589x_gpio_probe(struct platform_device *pdev)
return ret;
}
- ret = gpiochip_irqchip_add(&tc3589x_gpio->chip,
- &tc3589x_gpio_irq_chip,
- 0,
- handle_simple_irq,
- IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add_nested(&tc3589x_gpio->chip,
+ &tc3589x_gpio_irq_chip,
+ 0,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
if (ret) {
dev_err(&pdev->dev,
"could not connect irqchip to gpiochip\n");
return ret;
}
- gpiochip_set_chained_irqchip(&tc3589x_gpio->chip,
- &tc3589x_gpio_irq_chip,
- irq,
- NULL);
+ gpiochip_set_nested_irqchip(&tc3589x_gpio->chip,
+ &tc3589x_gpio_irq_chip,
+ irq);
platform_set_drvdata(pdev, tc3589x_gpio);
diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
index 3edb09cb9ee0..521fbe338589 100644
--- a/drivers/gpio/gpio-vf610.c
+++ b/drivers/gpio/gpio-vf610.c
@@ -283,8 +283,4 @@ static struct platform_driver vf610_gpio_driver = {
.probe = vf610_gpio_probe,
};
-static int __init gpio_vf610_init(void)
-{
- return platform_driver_register(&vf610_gpio_driver);
-}
-device_initcall(gpio_vf610_init);
+builtin_platform_driver(vf610_gpio_driver);
diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index d0ddba7a9d08..34baee5b1dd6 100644
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -426,8 +426,8 @@ static int wcove_gpio_probe(struct platform_device *pdev)
return ret;
}
- ret = gpiochip_irqchip_add(&wg->chip, &wcove_irqchip, 0,
- handle_simple_irq, IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add_nested(&wg->chip, &wcove_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "Failed to add irqchip: %d\n", ret);
return ret;
@@ -446,6 +446,8 @@ static int wcove_gpio_probe(struct platform_device *pdev)
return ret;
}
+ gpiochip_set_nested_irqchip(&wg->chip, &wcove_irqchip, virq);
+
return 0;
}
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 72a4b326fd0d..a3faefa44f68 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -468,7 +468,8 @@ static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
int ret;
memset(&args, 0, sizeof(args));
- ret = acpi_node_get_property_reference(fwnode, propname, index, &args);
+ ret = __acpi_node_get_property_reference(fwnode, propname, index, 3,
+ &args);
if (ret) {
struct acpi_device *adev = to_acpi_device_node(fwnode);
@@ -483,13 +484,13 @@ static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
* on returned args.
*/
lookup->adev = args.adev;
- if (args.nargs >= 2) {
- lookup->index = args.args[0];
- lookup->pin_index = args.args[1];
- /* 3rd argument, if present is used to specify active_low. */
- if (args.nargs >= 3)
- lookup->active_low = !!args.args[2];
- }
+ if (args.nargs != 3)
+ return -EPROTO;
+
+ lookup->index = args.args[0];
+ lookup->pin_index = args.args[1];
+ lookup->active_low = !!args.args[2];
+
return 0;
}
@@ -859,6 +860,77 @@ static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip)
}
}
+static struct gpio_desc *acpi_gpiochip_parse_own_gpio(
+ struct acpi_gpio_chip *achip, struct fwnode_handle *fwnode,
+ const char **name, unsigned int *lflags, unsigned int *dflags)
+{
+ struct gpio_chip *chip = achip->chip;
+ struct gpio_desc *desc;
+ u32 gpios[2];
+ int ret;
+
+ *lflags = 0;
+ *dflags = 0;
+ *name = NULL;
+
+ ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios,
+ ARRAY_SIZE(gpios));
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ ret = acpi_gpiochip_pin_to_gpio_offset(chip->gpiodev, gpios[0]);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ desc = gpiochip_get_desc(chip, ret);
+ if (IS_ERR(desc))
+ return desc;
+
+ if (gpios[1])
+ *lflags |= GPIO_ACTIVE_LOW;
+
+ if (fwnode_property_present(fwnode, "input"))
+ *dflags |= GPIOD_IN;
+ else if (fwnode_property_present(fwnode, "output-low"))
+ *dflags |= GPIOD_OUT_LOW;
+ else if (fwnode_property_present(fwnode, "output-high"))
+ *dflags |= GPIOD_OUT_HIGH;
+ else
+ return ERR_PTR(-EINVAL);
+
+ fwnode_property_read_string(fwnode, "line-name", name);
+
+ return desc;
+}
+
+static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
+{
+ struct gpio_chip *chip = achip->chip;
+ struct fwnode_handle *fwnode;
+
+ device_for_each_child_node(chip->parent, fwnode) {
+ unsigned int lflags, dflags;
+ struct gpio_desc *desc;
+ const char *name;
+ int ret;
+
+ if (!fwnode_property_present(fwnode, "gpio-hog"))
+ continue;
+
+ desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name,
+ &lflags, &dflags);
+ if (IS_ERR(desc))
+ continue;
+
+ ret = gpiod_hog(desc, name, lflags, dflags);
+ if (ret) {
+ dev_err(chip->parent, "Failed to hog GPIO\n");
+ fwnode_handle_put(fwnode);
+ return;
+ }
+ }
+}
+
void acpi_gpiochip_add(struct gpio_chip *chip)
{
struct acpi_gpio_chip *acpi_gpio;
@@ -889,7 +961,11 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
return;
}
+ if (!chip->names)
+ devprop_gpiochip_set_names(chip);
+
acpi_gpiochip_request_regions(acpi_gpio);
+ acpi_gpiochip_scan_gpios(acpi_gpio);
acpi_walk_dep_device_list(handle);
}
@@ -918,18 +994,27 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
kfree(acpi_gpio);
}
-static unsigned int acpi_gpio_package_count(const union acpi_object *obj)
+static int acpi_gpio_package_count(const union acpi_object *obj)
{
const union acpi_object *element = obj->package.elements;
const union acpi_object *end = element + obj->package.count;
unsigned int count = 0;
while (element < end) {
- if (element->type == ACPI_TYPE_LOCAL_REFERENCE)
+ switch (element->type) {
+ case ACPI_TYPE_LOCAL_REFERENCE:
+ element += 3;
+ /* Fallthrough */
+ case ACPI_TYPE_INTEGER:
+ element++;
count++;
+ break;
- element++;
+ default:
+ return -EPROTO;
+ }
}
+
return count;
}
diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c
new file mode 100644
index 000000000000..27f383bda7d9
--- /dev/null
+++ b/drivers/gpio/gpiolib-devprop.c
@@ -0,0 +1,67 @@
+/*
+ * Device property helpers for GPIO chips.
+ *
+ * Copyright (C) 2016, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+
+#include "gpiolib.h"
+
+/**
+ * devprop_gpiochip_set_names - Set GPIO line names using device properties
+ * @chip: GPIO chip whose lines should be named, if possible
+ *
+ * Looks for device property "gpio-line-names" and if it exists assigns
+ * GPIO line names for the chip. The memory allocated for the assigned
+ * names belong to the underlying firmware node and should not be released
+ * by the caller.
+ */
+void devprop_gpiochip_set_names(struct gpio_chip *chip)
+{
+ struct gpio_device *gdev = chip->gpiodev;
+ const char **names;
+ int ret, i;
+
+ if (!chip->parent) {
+ dev_warn(&gdev->dev, "GPIO chip parent is NULL\n");
+ return;
+ }
+
+ ret = device_property_read_string_array(chip->parent, "gpio-line-names",
+ NULL, 0);
+ if (ret < 0)
+ return;
+
+ if (ret != gdev->ngpio) {
+ dev_warn(chip->parent,
+ "names %d do not match number of GPIOs %d\n", ret,
+ gdev->ngpio);
+ return;
+ }
+
+ names = kcalloc(gdev->ngpio, sizeof(*names), GFP_KERNEL);
+ if (!names)
+ return;
+
+ ret = device_property_read_string_array(chip->parent, "gpio-line-names",
+ names, gdev->ngpio);
+ if (ret < 0) {
+ dev_warn(chip->parent, "failed to read GPIO line names\n");
+ kfree(names);
+ return;
+ }
+
+ for (i = 0; i < gdev->ngpio; i++)
+ gdev->descs[i].name = names[i];
+
+ kfree(names);
+}
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 193f15d50bba..92b185f19232 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -226,51 +226,6 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
}
/**
- * of_gpiochip_set_names() - set up the names of the lines
- * @chip: GPIO chip whose lines should be named, if possible
- */
-static void of_gpiochip_set_names(struct gpio_chip *gc)
-{
- struct gpio_device *gdev = gc->gpiodev;
- struct device_node *np = gc->of_node;
- int i;
- int nstrings;
-
- nstrings = of_property_count_strings(np, "gpio-line-names");
- if (nstrings <= 0)
- /* Lines names not present */
- return;
-
- /* This is normally not what you want */
- if (gdev->ngpio != nstrings)
- dev_info(&gdev->dev, "gpio-line-names specifies %d line "
- "names but there are %d lines on the chip\n",
- nstrings, gdev->ngpio);
-
- /*
- * Make sure to not index beyond the end of the number of descriptors
- * of the GPIO device.
- */
- for (i = 0; i < gdev->ngpio; i++) {
- const char *name;
- int ret;
-
- ret = of_property_read_string_index(np,
- "gpio-line-names",
- i,
- &name);
- if (ret) {
- if (ret != -ENODATA)
- dev_err(&gdev->dev,
- "unable to name line %d: %d\n",
- i, ret);
- break;
- }
- gdev->descs[i].name = name;
- }
-}
-
-/**
* of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions
* @chip: gpio chip to act on
*
@@ -296,8 +251,10 @@ static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
continue;
ret = gpiod_hog(desc, name, lflags, dflags);
- if (ret < 0)
+ if (ret < 0) {
+ of_node_put(np);
return ret;
+ }
}
return 0;
@@ -526,7 +483,7 @@ int of_gpiochip_add(struct gpio_chip *chip)
/* If the chip defines names itself, these take precedence */
if (!chip->names)
- of_gpiochip_set_names(chip);
+ devprop_gpiochip_set_names(chip);
of_node_get(chip->of_node);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 868128a676ba..f4c26c7826cd 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -986,7 +986,8 @@ static int gpio_chrdev_open(struct inode *inode, struct file *filp)
return -ENODEV;
get_device(&gdev->dev);
filp->private_data = gdev;
- return 0;
+
+ return nonseekable_open(inode, filp);
}
/**
@@ -1011,7 +1012,7 @@ static const struct file_operations gpio_fileops = {
.release = gpio_chrdev_release,
.open = gpio_chrdev_open,
.owner = THIS_MODULE,
- .llseek = noop_llseek,
+ .llseek = no_llseek,
.unlocked_ioctl = gpio_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = gpio_ioctl_compat,
@@ -1512,7 +1513,7 @@ static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
}
/**
- * gpiochip_set_chained_irqchip() - sets a chained irqchip to a gpiochip
+ * gpiochip_set_cascaded_irqchip() - connects a cascaded irqchip to a gpiochip
* @gpiochip: the gpiochip to set the irqchip chain to
* @irqchip: the irqchip to chain to the gpiochip
* @parent_irq: the irq number corresponding to the parent IRQ for this
@@ -1521,10 +1522,10 @@ static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
* coming out of the gpiochip. If the interrupt is nested rather than
* cascaded, pass NULL in this handler argument
*/
-void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
- struct irq_chip *irqchip,
- int parent_irq,
- irq_flow_handler_t parent_handler)
+static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ int parent_irq,
+ irq_flow_handler_t parent_handler)
{
unsigned int offset;
@@ -1548,7 +1549,7 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
irq_set_chained_handler_and_data(parent_irq, parent_handler,
gpiochip);
- gpiochip->irq_parent = parent_irq;
+ gpiochip->irq_chained_parent = parent_irq;
}
/* Set the parent IRQ for all affected IRQs */
@@ -1559,9 +1560,48 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
parent_irq);
}
}
+
+/**
+ * gpiochip_set_chained_irqchip() - connects a chained irqchip to a gpiochip
+ * @gpiochip: the gpiochip to set the irqchip chain to
+ * @irqchip: the irqchip to chain to the gpiochip
+ * @parent_irq: the irq number corresponding to the parent IRQ for this
+ * chained irqchip
+ * @parent_handler: the parent interrupt handler for the accumulated IRQ
+ * coming out of the gpiochip. If the interrupt is nested rather than
+ * cascaded, pass NULL in this handler argument
+ */
+void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ int parent_irq,
+ irq_flow_handler_t parent_handler)
+{
+ gpiochip_set_cascaded_irqchip(gpiochip, irqchip, parent_irq,
+ parent_handler);
+}
EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);
/**
+ * gpiochip_set_nested_irqchip() - connects a nested irqchip to a gpiochip
+ * @gpiochip: the gpiochip to set the irqchip nested handler to
+ * @irqchip: the irqchip to nest to the gpiochip
+ * @parent_irq: the irq number corresponding to the parent IRQ for this
+ * nested irqchip
+ */
+void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ int parent_irq)
+{
+ if (!gpiochip->irq_nested) {
+ chip_err(gpiochip, "tried to nest a chained gpiochip\n");
+ return;
+ }
+ gpiochip_set_cascaded_irqchip(gpiochip, irqchip, parent_irq,
+ NULL);
+}
+EXPORT_SYMBOL_GPL(gpiochip_set_nested_irqchip);
+
+/**
* gpiochip_irq_map() - maps an IRQ into a GPIO irqchip
* @d: the irqdomain used by this irqchip
* @irq: the global irq number used by this GPIO irqchip irq
@@ -1583,8 +1623,8 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
*/
irq_set_lockdep_class(irq, chip->lock_key);
irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
- /* Chips that can sleep need nested thread handlers */
- if (chip->can_sleep && !chip->irq_not_threaded)
+ /* Chips that use nested thread handlers have them marked */
+ if (chip->irq_nested)
irq_set_nested_thread(irq, 1);
irq_set_noprobe(irq);
@@ -1602,7 +1642,7 @@ static void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq)
{
struct gpio_chip *chip = d->host_data;
- if (chip->can_sleep)
+ if (chip->irq_nested)
irq_set_nested_thread(irq, 0);
irq_set_chip_and_handler(irq, NULL, NULL);
irq_set_chip_data(irq, NULL);
@@ -1657,9 +1697,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
acpi_gpiochip_free_interrupts(gpiochip);
- if (gpiochip->irq_parent) {
- irq_set_chained_handler(gpiochip->irq_parent, NULL);
- irq_set_handler_data(gpiochip->irq_parent, NULL);
+ if (gpiochip->irq_chained_parent) {
+ irq_set_chained_handler(gpiochip->irq_chained_parent, NULL);
+ irq_set_handler_data(gpiochip->irq_chained_parent, NULL);
}
/* Remove all IRQ mappings and delete the domain */
@@ -1683,7 +1723,7 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
}
/**
- * gpiochip_irqchip_add() - adds an irqchip to a gpiochip
+ * _gpiochip_irqchip_add() - adds an irqchip to a gpiochip
* @gpiochip: the gpiochip to add the irqchip to
* @irqchip: the irqchip to add to the gpiochip
* @first_irq: if not dynamically assigned, the base (first) IRQ to
@@ -1691,6 +1731,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
* @handler: the irq handler to use (often a predefined irq core function)
* @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE
* to have the core avoid setting up any default type in the hardware.
+ * @nested: whether this is a nested irqchip calling handle_nested_irq()
+ * in its IRQ handler
* @lock_key: lockdep class
*
* This function closely associates a certain irqchip with a certain
@@ -1712,6 +1754,7 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
unsigned int first_irq,
irq_flow_handler_t handler,
unsigned int type,
+ bool nested,
struct lock_class_key *lock_key)
{
struct device_node *of_node;
@@ -1726,6 +1769,7 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
pr_err("missing gpiochip .dev parent pointer\n");
return -EINVAL;
}
+ gpiochip->irq_nested = nested;
of_node = gpiochip->parent->of_node;
#ifdef CONFIG_OF_GPIO
/*
@@ -2223,6 +2267,7 @@ EXPORT_SYMBOL_GPL(gpiod_direction_input);
static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
{
struct gpio_chip *gc = desc->gdev->chip;
+ int val = !!value;
int ret;
/* GPIOs used for IRQs shall not be set as output */
@@ -2242,7 +2287,7 @@ static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
goto set_output_value;
}
/* Emulate open drain by not actively driving the line high */
- if (value)
+ if (val)
return gpiod_direction_input(desc);
}
else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) {
@@ -2253,7 +2298,7 @@ static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
goto set_output_value;
}
/* Emulate open source by not actively driving the line low */
- if (!value)
+ if (!val)
return gpiod_direction_input(desc);
} else {
/* Make sure to disable open drain/source hardware, if any */
@@ -2271,10 +2316,10 @@ set_output_value:
return -EIO;
}
- ret = gc->direction_output(gc, gpio_chip_hwgpio(desc), value);
+ ret = gc->direction_output(gc, gpio_chip_hwgpio(desc), val);
if (!ret)
set_bit(FLAG_IS_OUT, &desc->flags);
- trace_gpio_value(desc_to_gpio(desc), 0, value);
+ trace_gpio_value(desc_to_gpio(desc), 0, val);
trace_gpio_direction(desc_to_gpio(desc), 0, ret);
return ret;
}
@@ -2314,6 +2359,8 @@ int gpiod_direction_output(struct gpio_desc *desc, int value)
VALIDATE_DESC(desc);
if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
value = !value;
+ else
+ value = !!value;
return _gpiod_direction_output_raw(desc, value);
}
EXPORT_SYMBOL_GPL(gpiod_direction_output);
@@ -2758,6 +2805,15 @@ int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
}
set_bit(FLAG_USED_AS_IRQ, &desc->flags);
+
+ /*
+ * If the consumer has not set up a label (such as when the
+ * IRQ is referenced from .to_irq()) we set up a label here
+ * so it is clear this is used as an interrupt.
+ */
+ if (!desc->label)
+ desc_set_label(desc, "interrupt");
+
return 0;
}
EXPORT_SYMBOL_GPL(gpiochip_lock_as_irq);
@@ -2772,10 +2828,17 @@ EXPORT_SYMBOL_GPL(gpiochip_lock_as_irq);
*/
void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset)
{
- if (offset >= chip->ngpio)
+ struct gpio_desc *desc;
+
+ desc = gpiochip_get_desc(chip, offset);
+ if (IS_ERR(desc))
return;
- clear_bit(FLAG_USED_AS_IRQ, &chip->gpiodev->descs[offset].flags);
+ clear_bit(FLAG_USED_AS_IRQ, &desc->flags);
+
+ /* If we only had this marking, erase it */
+ if (desc->label && !strcmp(desc->label, "interrupt"))
+ desc_set_label(desc, NULL);
}
EXPORT_SYMBOL_GPL(gpiochip_unlock_as_irq);
@@ -3170,7 +3233,7 @@ static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
/* Process flags */
if (dflags & GPIOD_FLAGS_BIT_DIR_OUT)
status = gpiod_direction_output(desc,
- dflags & GPIOD_FLAGS_BIT_DIR_VAL);
+ !!(dflags & GPIOD_FLAGS_BIT_DIR_VAL));
else
status = gpiod_direction_input(desc);
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 346fbda39220..d10eaf520860 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -209,6 +209,8 @@ static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc)
return desc - &desc->gdev->descs[0];
}
+void devprop_gpiochip_set_names(struct gpio_chip *chip);
+
/* With descriptor prefix */
#define gpiod_emerg(desc, fmt, ...) \
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 0e75d94972ba..801fa8bb05e1 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -164,6 +164,20 @@ config PINCTRL_SIRF
select GENERIC_PINCONF
select GPIOLIB_IRQCHIP
+config PINCTRL_SX150X
+ bool "Semtech SX150x I2C GPIO expander pinctrl driver"
+ depends on GPIOLIB && I2C=y
+ select PINMUX
+ select PINCONF
+ select GENERIC_PINCONF
+ select GPIOLIB_IRQCHIP
+ help
+ Say yes here to provide support for Semtech SX150x-series I2C
+ GPIO expanders as pinctrl module.
+ Compatible models include:
+ - 8 bits: sx1508q, sx1502q
+ - 16 bits: sx1509q, sx1506q
+
config PINCTRL_PISTACHIO
def_bool y if MACH_PISTACHIO
depends on GPIOLIB
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 11bad373dfe0..3b8e6f726acb 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
obj-$(CONFIG_PINCTRL_SIRF) += sirf/
+obj-$(CONFIG_PINCTRL_SX150X) += pinctrl-sx150x.o
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_PINCTRL_TZ1090) += pinctrl-tz1090.o
obj-$(CONFIG_PINCTRL_TZ1090_PDC) += pinctrl-tz1090-pdc.o
diff --git a/drivers/pinctrl/pinctrl-sx150x.c b/drivers/pinctrl/pinctrl-sx150x.c
new file mode 100644
index 000000000000..d2d4211e615e
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-sx150x.c
@@ -0,0 +1,1062 @@
+/*
+ * Copyright (c) 2016, BayLibre, SAS. All rights reserved.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * Driver for Semtech SX150X I2C GPIO Expanders
+ *
+ * Author: Gregory Bean <gbean@codeaurora.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/gpio.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include "core.h"
+#include "pinconf.h"
+#include "pinctrl-utils.h"
+
+/* The chip models of sx150x */
+enum {
+ SX150X_123 = 0,
+ SX150X_456,
+ SX150X_789,
+};
+
+struct sx150x_123_pri {
+ u8 reg_pld_mode;
+ u8 reg_pld_table0;
+ u8 reg_pld_table1;
+ u8 reg_pld_table2;
+ u8 reg_pld_table3;
+ u8 reg_pld_table4;
+ u8 reg_advance;
+};
+
+struct sx150x_456_pri {
+ u8 reg_pld_mode;
+ u8 reg_pld_table0;
+ u8 reg_pld_table1;
+ u8 reg_pld_table2;
+ u8 reg_pld_table3;
+ u8 reg_pld_table4;
+ u8 reg_advance;
+};
+
+struct sx150x_789_pri {
+ u8 reg_drain;
+ u8 reg_polarity;
+ u8 reg_clock;
+ u8 reg_misc;
+ u8 reg_reset;
+ u8 ngpios;
+};
+
+struct sx150x_device_data {
+ u8 model;
+ u8 reg_pullup;
+ u8 reg_pulldn;
+ u8 reg_dir;
+ u8 reg_data;
+ u8 reg_irq_mask;
+ u8 reg_irq_src;
+ u8 reg_sense;
+ u8 ngpios;
+ union {
+ struct sx150x_123_pri x123;
+ struct sx150x_456_pri x456;
+ struct sx150x_789_pri x789;
+ } pri;
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+};
+
+struct sx150x_pinctrl {
+ struct device *dev;
+ struct i2c_client *client;
+ struct pinctrl_dev *pctldev;
+ struct pinctrl_desc pinctrl_desc;
+ struct gpio_chip gpio;
+ struct irq_chip irq_chip;
+ struct {
+ int update;
+ u32 sense;
+ u32 masked;
+ u32 dev_sense;
+ u32 dev_masked;
+ } irq;
+ struct mutex lock;
+ const struct sx150x_device_data *data;
+};
+
+static const struct pinctrl_pin_desc sx150x_8_pins[] = {
+ PINCTRL_PIN(0, "gpio0"),
+ PINCTRL_PIN(1, "gpio1"),
+ PINCTRL_PIN(2, "gpio2"),
+ PINCTRL_PIN(3, "gpio3"),
+ PINCTRL_PIN(4, "gpio4"),
+ PINCTRL_PIN(5, "gpio5"),
+ PINCTRL_PIN(6, "gpio6"),
+ PINCTRL_PIN(7, "gpio7"),
+ PINCTRL_PIN(8, "oscio"),
+};
+
+static const struct pinctrl_pin_desc sx150x_16_pins[] = {
+ PINCTRL_PIN(0, "gpio0"),
+ PINCTRL_PIN(1, "gpio1"),
+ PINCTRL_PIN(2, "gpio2"),
+ PINCTRL_PIN(3, "gpio3"),
+ PINCTRL_PIN(4, "gpio4"),
+ PINCTRL_PIN(5, "gpio5"),
+ PINCTRL_PIN(6, "gpio6"),
+ PINCTRL_PIN(7, "gpio7"),
+ PINCTRL_PIN(8, "gpio8"),
+ PINCTRL_PIN(9, "gpio9"),
+ PINCTRL_PIN(10, "gpio10"),
+ PINCTRL_PIN(11, "gpio11"),
+ PINCTRL_PIN(12, "gpio12"),
+ PINCTRL_PIN(13, "gpio13"),
+ PINCTRL_PIN(14, "gpio14"),
+ PINCTRL_PIN(15, "gpio15"),
+ PINCTRL_PIN(16, "oscio"),
+};
+
+static const struct sx150x_device_data sx1508q_device_data = {
+ .model = SX150X_789,
+ .reg_pullup = 0x03,
+ .reg_pulldn = 0x04,
+ .reg_dir = 0x07,
+ .reg_data = 0x08,
+ .reg_irq_mask = 0x09,
+ .reg_irq_src = 0x0c,
+ .reg_sense = 0x0b,
+ .pri.x789 = {
+ .reg_drain = 0x05,
+ .reg_polarity = 0x06,
+ .reg_clock = 0x0f,
+ .reg_misc = 0x10,
+ .reg_reset = 0x7d,
+ },
+ .ngpios = 8,
+ .pins = sx150x_8_pins,
+ .npins = ARRAY_SIZE(sx150x_8_pins),
+};
+
+static const struct sx150x_device_data sx1509q_device_data = {
+ .model = SX150X_789,
+ .reg_pullup = 0x07,
+ .reg_pulldn = 0x09,
+ .reg_dir = 0x0f,
+ .reg_data = 0x11,
+ .reg_irq_mask = 0x13,
+ .reg_irq_src = 0x19,
+ .reg_sense = 0x17,
+ .pri.x789 = {
+ .reg_drain = 0x0b,
+ .reg_polarity = 0x0d,
+ .reg_clock = 0x1e,
+ .reg_misc = 0x1f,
+ .reg_reset = 0x7d,
+ },
+ .ngpios = 16,
+ .pins = sx150x_16_pins,
+ .npins = ARRAY_SIZE(sx150x_16_pins),
+};
+
+static const struct sx150x_device_data sx1506q_device_data = {
+ .model = SX150X_456,
+ .reg_pullup = 0x05,
+ .reg_pulldn = 0x07,
+ .reg_dir = 0x03,
+ .reg_data = 0x01,
+ .reg_irq_mask = 0x09,
+ .reg_irq_src = 0x0f,
+ .reg_sense = 0x0d,
+ .pri.x456 = {
+ .reg_pld_mode = 0x21,
+ .reg_pld_table0 = 0x23,
+ .reg_pld_table1 = 0x25,
+ .reg_pld_table2 = 0x27,
+ .reg_pld_table3 = 0x29,
+ .reg_pld_table4 = 0x2b,
+ .reg_advance = 0xad,
+ },
+ .ngpios = 16,
+ .pins = sx150x_16_pins,
+ .npins = 16, /* oscio not available */
+};
+
+static const struct sx150x_device_data sx1502q_device_data = {
+ .model = SX150X_123,
+ .reg_pullup = 0x02,
+ .reg_pulldn = 0x03,
+ .reg_dir = 0x01,
+ .reg_data = 0x00,
+ .reg_irq_mask = 0x05,
+ .reg_irq_src = 0x08,
+ .reg_sense = 0x07,
+ .pri.x123 = {
+ .reg_pld_mode = 0x10,
+ .reg_pld_table0 = 0x11,
+ .reg_pld_table1 = 0x12,
+ .reg_pld_table2 = 0x13,
+ .reg_pld_table3 = 0x14,
+ .reg_pld_table4 = 0x15,
+ .reg_advance = 0xad,
+ },
+ .ngpios = 8,
+ .pins = sx150x_8_pins,
+ .npins = 8, /* oscio not available */
+};
+
+static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val)
+{
+ s32 err = i2c_smbus_write_byte_data(client, reg, val);
+
+ if (err < 0)
+ dev_warn(&client->dev,
+ "i2c write fail: can't write %02x to %02x: %d\n",
+ val, reg, err);
+ return err;
+}
+
+static s32 sx150x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
+{
+ s32 err = i2c_smbus_read_byte_data(client, reg);
+
+ if (err >= 0)
+ *val = err;
+ else
+ dev_warn(&client->dev,
+ "i2c read fail: can't read from %02x: %d\n",
+ reg, err);
+ return err;
+}
+
+/*
+ * These utility functions solve the common problem of locating and setting
+ * configuration bits. Configuration bits are grouped into registers
+ * whose indexes increase downwards. For example, with eight-bit registers,
+ * sixteen gpios would have their config bits grouped in the following order:
+ * REGISTER N-1 [ f e d c b a 9 8 ]
+ * N [ 7 6 5 4 3 2 1 0 ]
+ *
+ * For multi-bit configurations, the pattern gets wider:
+ * REGISTER N-3 [ f f e e d d c c ]
+ * N-2 [ b b a a 9 9 8 8 ]
+ * N-1 [ 7 7 6 6 5 5 4 4 ]
+ * N [ 3 3 2 2 1 1 0 0 ]
+ *
+ * Given the address of the starting register 'N', the index of the gpio
+ * whose configuration we seek to change, and the width in bits of that
+ * configuration, these functions allow us to locate the correct
+ * register and mask the correct bits.
+ */
+static inline void sx150x_find_cfg(u8 offset, u8 width,
+ u8 *reg, u8 *mask, u8 *shift)
+{
+ *reg -= offset * width / 8;
+ *mask = (1 << width) - 1;
+ *shift = (offset * width) % 8;
+ *mask <<= *shift;
+}
+
+static int sx150x_write_cfg(struct i2c_client *client,
+ u8 offset, u8 width, u8 reg, u8 val)
+{
+ u8 mask;
+ u8 data;
+ u8 shift;
+ int err;
+
+ sx150x_find_cfg(offset, width, &reg, &mask, &shift);
+ err = sx150x_i2c_read(client, reg, &data);
+ if (err < 0)
+ return err;
+
+ data &= ~mask;
+ data |= (val << shift) & mask;
+ return sx150x_i2c_write(client, reg, data);
+}
+
+static int sx150x_read_cfg(struct i2c_client *client,
+ u8 offset, u8 width, u8 reg)
+{
+ u8 mask;
+ u8 data;
+ u8 shift;
+ int err;
+
+ sx150x_find_cfg(offset, width, &reg, &mask, &shift);
+ err = sx150x_i2c_read(client, reg, &data);
+ if (err < 0)
+ return err;
+
+ return (data & mask);
+}
+
+static int sx150x_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ return 0;
+}
+
+static const char *sx150x_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int group)
+{
+ return NULL;
+}
+
+static int sx150x_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int group,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ return -ENOTSUPP;
+}
+
+static const struct pinctrl_ops sx150x_pinctrl_ops = {
+ .get_groups_count = sx150x_pinctrl_get_groups_count,
+ .get_group_name = sx150x_pinctrl_get_group_name,
+ .get_group_pins = sx150x_pinctrl_get_group_pins,
+#ifdef CONFIG_OF
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_free_map,
+#endif
+};
+
+static bool sx150x_pin_is_oscio(struct sx150x_pinctrl *pctl, unsigned int pin)
+{
+ if (pin >= pctl->data->npins)
+ return false;
+
+ /* OSCIO pin is only present in 789 devices */
+ if (pctl->data->model != SX150X_789)
+ return false;
+
+ return !strcmp(pctl->data->pins[pin].name, "oscio");
+}
+
+static int sx150x_gpio_get_direction(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+ int status;
+
+ if (sx150x_pin_is_oscio(pctl, offset))
+ return false;
+
+ status = sx150x_read_cfg(pctl->client, offset, 1, pctl->data->reg_dir);
+ if (status >= 0)
+ status = !!status;
+
+ return status;
+}
+
+static int sx150x_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+ int status;
+
+ if (sx150x_pin_is_oscio(pctl, offset))
+ return -EINVAL;
+
+ status = sx150x_read_cfg(pctl->client, offset, 1, pctl->data->reg_data);
+ if (status >= 0)
+ status = !!status;
+
+ return status;
+}
+
+static int sx150x_gpio_set_single_ended(struct gpio_chip *chip,
+ unsigned int offset,
+ enum single_ended_mode mode)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+ int ret;
+
+ switch (mode) {
+ case LINE_MODE_PUSH_PULL:
+ if (pctl->data->model != SX150X_789 ||
+ sx150x_pin_is_oscio(pctl, offset))
+ return 0;
+
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->pri.x789.reg_drain,
+ 0);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+ break;
+
+ case LINE_MODE_OPEN_DRAIN:
+ if (pctl->data->model != SX150X_789 ||
+ sx150x_pin_is_oscio(pctl, offset))
+ return -ENOTSUPP;
+
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->pri.x789.reg_drain,
+ 1);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+
+ return 0;
+}
+
+static void sx150x_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+
+ if (sx150x_pin_is_oscio(pctl, offset)) {
+
+ mutex_lock(&pctl->lock);
+ sx150x_i2c_write(pctl->client,
+ pctl->data->pri.x789.reg_clock,
+ (value ? 0x1f : 0x10));
+ mutex_unlock(&pctl->lock);
+ } else {
+ mutex_lock(&pctl->lock);
+ sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->reg_data,
+ (value ? 1 : 0));
+ mutex_unlock(&pctl->lock);
+ }
+}
+
+static int sx150x_gpio_direction_input(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+ int ret;
+
+ if (sx150x_pin_is_oscio(pctl, offset))
+ return -EINVAL;
+
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->reg_dir, 1);
+ mutex_unlock(&pctl->lock);
+
+ return ret;
+}
+
+static int sx150x_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
+ int status;
+
+ if (sx150x_pin_is_oscio(pctl, offset)) {
+ sx150x_gpio_set(chip, offset, value);
+ return 0;
+ }
+
+ mutex_lock(&pctl->lock);
+ status = sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->reg_data,
+ (value ? 1 : 0));
+ if (status >= 0)
+ status = sx150x_write_cfg(pctl->client, offset, 1,
+ pctl->data->reg_dir, 0);
+ mutex_unlock(&pctl->lock);
+
+ return status;
+}
+
+static void sx150x_irq_mask(struct irq_data *d)
+{
+ struct sx150x_pinctrl *pctl =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ unsigned int n = d->hwirq;
+
+ pctl->irq.masked |= (1 << n);
+ pctl->irq.update = n;
+}
+
+static void sx150x_irq_unmask(struct irq_data *d)
+{
+ struct sx150x_pinctrl *pctl =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ unsigned int n = d->hwirq;
+
+ pctl->irq.masked &= ~(1 << n);
+ pctl->irq.update = n;
+}
+
+static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type)
+{
+ struct sx150x_pinctrl *pctl =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ unsigned int n, val = 0;
+
+ if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
+ return -EINVAL;
+
+ n = d->hwirq;
+
+ if (flow_type & IRQ_TYPE_EDGE_RISING)
+ val |= 0x1;
+ if (flow_type & IRQ_TYPE_EDGE_FALLING)
+ val |= 0x2;
+
+ pctl->irq.sense &= ~(3UL << (n * 2));
+ pctl->irq.sense |= val << (n * 2);
+ pctl->irq.update = n;
+ return 0;
+}
+
+static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id)
+{
+ struct sx150x_pinctrl *pctl = (struct sx150x_pinctrl *)dev_id;
+ unsigned int nhandled = 0;
+ unsigned int sub_irq;
+ unsigned int n;
+ s32 err;
+ u8 val;
+ int i;
+
+ for (i = (pctl->data->ngpios / 8) - 1; i >= 0; --i) {
+ err = sx150x_i2c_read(pctl->client,
+ pctl->data->reg_irq_src - i,
+ &val);
+ if (err < 0)
+ continue;
+
+ err = sx150x_i2c_write(pctl->client,
+ pctl->data->reg_irq_src - i,
+ val);
+ if (err < 0)
+ continue;
+
+ for (n = 0; n < 8; ++n) {
+ if (val & (1 << n)) {
+ sub_irq = irq_find_mapping(
+ pctl->gpio.irqdomain,
+ (i * 8) + n);
+ handle_nested_irq(sub_irq);
+ ++nhandled;
+ }
+ }
+ }
+
+ return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE);
+}
+
+static void sx150x_irq_bus_lock(struct irq_data *d)
+{
+ struct sx150x_pinctrl *pctl =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+
+ mutex_lock(&pctl->lock);
+}
+
+static void sx150x_irq_bus_sync_unlock(struct irq_data *d)
+{
+ struct sx150x_pinctrl *pctl =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ unsigned int n;
+
+ if (pctl->irq.update < 0)
+ goto out;
+
+ n = pctl->irq.update;
+ pctl->irq.update = -1;
+
+ /* Avoid updates if nothing changed */
+ if (pctl->irq.dev_sense == pctl->irq.sense &&
+ pctl->irq.dev_masked == pctl->irq.masked)
+ goto out;
+
+ pctl->irq.dev_sense = pctl->irq.sense;
+ pctl->irq.dev_masked = pctl->irq.masked;
+
+ if (pctl->irq.masked & (1 << n)) {
+ sx150x_write_cfg(pctl->client, n, 1,
+ pctl->data->reg_irq_mask, 1);
+ sx150x_write_cfg(pctl->client, n, 2,
+ pctl->data->reg_sense, 0);
+ } else {
+ sx150x_write_cfg(pctl->client, n, 1,
+ pctl->data->reg_irq_mask, 0);
+ sx150x_write_cfg(pctl->client, n, 2,
+ pctl->data->reg_sense,
+ pctl->irq.sense >> (n * 2));
+ }
+out:
+ mutex_unlock(&pctl->lock);
+}
+
+static int sx150x_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct sx150x_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int param = pinconf_to_config_param(*config);
+ int ret;
+ u32 arg;
+
+ if (sx150x_pin_is_oscio(pctl, pin)) {
+ u8 data;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ case PIN_CONFIG_OUTPUT:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_i2c_read(pctl->client,
+ pctl->data->pri.x789.reg_clock,
+ &data);
+ mutex_unlock(&pctl->lock);
+
+ if (ret < 0)
+ return ret;
+
+ if (param == PIN_CONFIG_DRIVE_PUSH_PULL)
+ arg = (data & 0x1f) ? 1 : 0;
+ else {
+ if ((data & 0x1f) == 0x1f)
+ arg = 1;
+ else if ((data & 0x1f) == 0x10)
+ arg = 0;
+ else
+ return -EINVAL;
+ }
+
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ goto out;
+ }
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_read_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pulldn);
+ mutex_unlock(&pctl->lock);
+
+ if (ret < 0)
+ return ret;
+
+ if (!ret)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_read_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pullup);
+ mutex_unlock(&pctl->lock);
+
+ if (ret < 0)
+ return ret;
+
+ if (!ret)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (pctl->data->model != SX150X_789)
+ return -ENOTSUPP;
+
+ mutex_lock(&pctl->lock);
+ ret = sx150x_read_cfg(pctl->client, pin, 1,
+ pctl->data->pri.x789.reg_drain);
+ mutex_unlock(&pctl->lock);
+
+ if (ret < 0)
+ return ret;
+
+ if (!ret)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (pctl->data->model != SX150X_789)
+ arg = true;
+ else {
+ mutex_lock(&pctl->lock);
+ ret = sx150x_read_cfg(pctl->client, pin, 1,
+ pctl->data->pri.x789.reg_drain);
+ mutex_unlock(&pctl->lock);
+
+ if (ret < 0)
+ return ret;
+
+ if (ret)
+ return -EINVAL;
+
+ arg = 1;
+ }
+ break;
+
+ case PIN_CONFIG_OUTPUT:
+ ret = sx150x_gpio_get_direction(&pctl->gpio, pin);
+ if (ret < 0)
+ return ret;
+
+ if (ret)
+ return -EINVAL;
+
+ ret = sx150x_gpio_get(&pctl->gpio, pin);
+ if (ret < 0)
+ return ret;
+
+ arg = ret;
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+
+out:
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int sx150x_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct sx150x_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param;
+ u32 arg;
+ int i;
+ int ret;
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ if (sx150x_pin_is_oscio(pctl, pin)) {
+ if (param == PIN_CONFIG_OUTPUT) {
+ ret = sx150x_gpio_direction_output(&pctl->gpio,
+ pin, arg);
+ if (ret < 0)
+ return ret;
+
+ continue;
+ } else
+ return -ENOTSUPP;
+ }
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ case PIN_CONFIG_BIAS_DISABLE:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pulldn, 0);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pullup, 0);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pullup,
+ 1);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ mutex_lock(&pctl->lock);
+ ret = sx150x_write_cfg(pctl->client, pin, 1,
+ pctl->data->reg_pulldn,
+ 1);
+ mutex_unlock(&pctl->lock);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ ret = sx150x_gpio_set_single_ended(&pctl->gpio,
+ pin, LINE_MODE_OPEN_DRAIN);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ ret = sx150x_gpio_set_single_ended(&pctl->gpio,
+ pin, LINE_MODE_PUSH_PULL);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ case PIN_CONFIG_OUTPUT:
+ ret = sx150x_gpio_direction_output(&pctl->gpio,
+ pin, arg);
+ if (ret < 0)
+ return ret;
+
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+ } /* for each config */
+
+ return 0;
+}
+
+static const struct pinconf_ops sx150x_pinconf_ops = {
+ .pin_config_get = sx150x_pinconf_get,
+ .pin_config_set = sx150x_pinconf_set,
+ .is_generic = true,
+};
+
+static const struct i2c_device_id sx150x_id[] = {
+ {"sx1508q", (kernel_ulong_t) &sx1508q_device_data },
+ {"sx1509q", (kernel_ulong_t) &sx1509q_device_data },
+ {"sx1506q", (kernel_ulong_t) &sx1506q_device_data },
+ {"sx1502q", (kernel_ulong_t) &sx1502q_device_data },
+ {}
+};
+
+static const struct of_device_id sx150x_of_match[] = {
+ { .compatible = "semtech,sx1508q" },
+ { .compatible = "semtech,sx1509q" },
+ { .compatible = "semtech,sx1506q" },
+ { .compatible = "semtech,sx1502q" },
+ {},
+};
+
+static int sx150x_init_io(struct sx150x_pinctrl *pctl, u8 base, u16 cfg)
+{
+ int err = 0;
+ unsigned int n;
+
+ for (n = 0; err >= 0 && n < (pctl->data->ngpios / 8); ++n)
+ err = sx150x_i2c_write(pctl->client, base - n, cfg >> (n * 8));
+ return err;
+}
+
+static int sx150x_reset(struct sx150x_pinctrl *pctl)
+{
+ int err;
+
+ err = i2c_smbus_write_byte_data(pctl->client,
+ pctl->data->pri.x789.reg_reset,
+ 0x12);
+ if (err < 0)
+ return err;
+
+ err = i2c_smbus_write_byte_data(pctl->client,
+ pctl->data->pri.x789.reg_reset,
+ 0x34);
+ return err;
+}
+
+static int sx150x_init_hw(struct sx150x_pinctrl *pctl)
+{
+ int err;
+
+ if (pctl->data->model == SX150X_789 &&
+ of_property_read_bool(pctl->dev->of_node, "semtech,probe-reset")) {
+ err = sx150x_reset(pctl);
+ if (err < 0)
+ return err;
+ }
+
+ if (pctl->data->model == SX150X_789)
+ err = sx150x_i2c_write(pctl->client,
+ pctl->data->pri.x789.reg_misc,
+ 0x01);
+ else if (pctl->data->model == SX150X_456)
+ err = sx150x_i2c_write(pctl->client,
+ pctl->data->pri.x456.reg_advance,
+ 0x04);
+ else
+ err = sx150x_i2c_write(pctl->client,
+ pctl->data->pri.x123.reg_advance,
+ 0x00);
+ if (err < 0)
+ return err;
+
+ /* Set all pins to work in normal mode */
+ if (pctl->data->model == SX150X_789) {
+ err = sx150x_init_io(pctl,
+ pctl->data->pri.x789.reg_polarity,
+ 0);
+ if (err < 0)
+ return err;
+ } else if (pctl->data->model == SX150X_456) {
+ /* Set all pins to work in normal mode */
+ err = sx150x_init_io(pctl,
+ pctl->data->pri.x456.reg_pld_mode,
+ 0);
+ if (err < 0)
+ return err;
+ } else {
+ /* Set all pins to work in normal mode */
+ err = sx150x_init_io(pctl,
+ pctl->data->pri.x123.reg_pld_mode,
+ 0);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int sx150x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ static const u32 i2c_funcs = I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_WRITE_WORD_DATA;
+ struct device *dev = &client->dev;
+ struct sx150x_pinctrl *pctl;
+ int ret;
+
+ if (!id->driver_data)
+ return -EINVAL;
+
+ if (!i2c_check_functionality(client->adapter, i2c_funcs))
+ return -ENOSYS;
+
+ pctl = devm_kzalloc(dev, sizeof(*pctl), GFP_KERNEL);
+ if (!pctl)
+ return -ENOMEM;
+
+ pctl->dev = dev;
+ pctl->client = client;
+ pctl->data = (void *)id->driver_data;
+
+ mutex_init(&pctl->lock);
+
+ ret = sx150x_init_hw(pctl);
+ if (ret)
+ return ret;
+
+ /* Register GPIO controller */
+ pctl->gpio.label = devm_kstrdup(dev, client->name, GFP_KERNEL);
+ pctl->gpio.base = -1;
+ pctl->gpio.ngpio = pctl->data->npins;
+ pctl->gpio.get_direction = sx150x_gpio_get_direction;
+ pctl->gpio.direction_input = sx150x_gpio_direction_input;
+ pctl->gpio.direction_output = sx150x_gpio_direction_output;
+ pctl->gpio.get = sx150x_gpio_get;
+ pctl->gpio.set = sx150x_gpio_set;
+ pctl->gpio.set_single_ended = sx150x_gpio_set_single_ended;
+ pctl->gpio.parent = dev;
+#ifdef CONFIG_OF_GPIO
+ pctl->gpio.of_node = dev->of_node;
+#endif
+ pctl->gpio.can_sleep = true;
+
+ ret = devm_gpiochip_add_data(dev, &pctl->gpio, pctl);
+ if (ret)
+ return ret;
+
+ /* Add Interrupt support if an irq is specified */
+ if (client->irq > 0) {
+ pctl->irq_chip.name = devm_kstrdup(dev, client->name,
+ GFP_KERNEL);
+ pctl->irq_chip.irq_mask = sx150x_irq_mask;
+ pctl->irq_chip.irq_unmask = sx150x_irq_unmask;
+ pctl->irq_chip.irq_set_type = sx150x_irq_set_type;
+ pctl->irq_chip.irq_bus_lock = sx150x_irq_bus_lock;
+ pctl->irq_chip.irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock;
+
+ pctl->irq.masked = ~0;
+ pctl->irq.sense = 0;
+ pctl->irq.dev_masked = ~0;
+ pctl->irq.dev_sense = 0;
+ pctl->irq.update = -1;
+
+ ret = gpiochip_irqchip_add(&pctl->gpio,
+ &pctl->irq_chip, 0,
+ handle_edge_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "could not connect irqchip to gpiochip\n");
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ sx150x_irq_thread_fn,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING,
+ pctl->irq_chip.name, pctl);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Pinctrl_desc */
+ pctl->pinctrl_desc.name = "sx150x-pinctrl";
+ pctl->pinctrl_desc.pctlops = &sx150x_pinctrl_ops;
+ pctl->pinctrl_desc.confops = &sx150x_pinconf_ops;
+ pctl->pinctrl_desc.pins = pctl->data->pins;
+ pctl->pinctrl_desc.npins = pctl->data->npins;
+ pctl->pinctrl_desc.owner = THIS_MODULE;
+
+ pctl->pctldev = pinctrl_register(&pctl->pinctrl_desc, dev, pctl);
+ if (IS_ERR(pctl->pctldev)) {
+ dev_err(dev, "Failed to register pinctrl device\n");
+ return PTR_ERR(pctl->pctldev);
+ }
+
+ return 0;
+}
+
+static struct i2c_driver sx150x_driver = {
+ .driver = {
+ .name = "sx150x-pinctrl",
+ .of_match_table = of_match_ptr(sx150x_of_match),
+ },
+ .probe = sx150x_probe,
+ .id_table = sx150x_id,
+};
+
+static int __init sx150x_init(void)
+{
+ return i2c_add_driver(&sx150x_driver);
+}
+subsys_initcall(sx150x_init);
diff --git a/include/linux/amba/pl061.h b/include/linux/amba/pl061.h
deleted file mode 100644
index fb83c0453489..000000000000
--- a/include/linux/amba/pl061.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <linux/types.h>
-
-/* platform data for the PL061 GPIO driver */
-
-struct pl061_platform_data {
- /* number of the first GPIO */
- unsigned gpio_base;
-
- /* number of the first IRQ.
- * If the IRQ functionality in not desired this must be set to 0.
- */
- unsigned irq_base;
-
- u8 directions; /* startup directions, 1: out, 0: in */
- u8 values; /* startup values */
-};
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 24e2cc56beb1..c2748accea71 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -82,8 +82,6 @@ enum single_ended_mode {
* implies that if the chip supports IRQs, these IRQs need to be threaded
* as the chip access may sleep when e.g. reading out the IRQ status
* registers.
- * @irq_not_threaded: flag must be set if @can_sleep is set but the
- * IRQs don't need to be threaded
* @read_reg: reader function for generic GPIO
* @write_reg: writer function for generic GPIO
* @pin2mask: some generic GPIO controllers work with the big-endian bits
@@ -91,7 +89,7 @@ enum single_ended_mode {
* bit. This callback assigns the right bit mask.
* @reg_dat: data (in) register for generic GPIO
* @reg_set: output set register (out=high) for generic GPIO
- * @reg_clk: output clear register (out=low) for generic GPIO
+ * @reg_clr: output clear register (out=low) for generic GPIO
* @reg_dir: direction setting register for generic GPIO
* @bgpio_bits: number of register bits used for a generic GPIO i.e.
* <register width> * 8
@@ -109,8 +107,10 @@ enum single_ended_mode {
* for GPIO IRQs, provided by GPIO driver
* @irq_default_type: default IRQ triggering type applied during GPIO driver
* initialization, provided by GPIO driver
- * @irq_parent: GPIO IRQ chip parent/bank linux irq number,
- * provided by GPIO driver
+ * @irq_chained_parent: GPIO IRQ chip parent/bank linux irq number,
+ * provided by GPIO driver for chained interrupt (not for nested
+ * interrupts).
+ * @irq_nested: True if set the interrupt handling is nested.
* @irq_need_valid_mask: If set core allocates @irq_valid_mask with all
* bits set to one
* @irq_valid_mask: If not %NULL holds bitmask of GPIOs which are valid to
@@ -166,7 +166,6 @@ struct gpio_chip {
u16 ngpio;
const char *const *names;
bool can_sleep;
- bool irq_not_threaded;
#if IS_ENABLED(CONFIG_GPIO_GENERIC)
unsigned long (*read_reg)(void __iomem *reg);
@@ -192,7 +191,8 @@ struct gpio_chip {
unsigned int irq_base;
irq_flow_handler_t irq_handler;
unsigned int irq_default_type;
- int irq_parent;
+ int irq_chained_parent;
+ bool irq_nested;
bool irq_need_valid_mask;
unsigned long *irq_valid_mask;
struct lock_class_key *lock_key;
@@ -270,24 +270,40 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
int parent_irq,
irq_flow_handler_t parent_handler);
+void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ int parent_irq);
+
int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
struct irq_chip *irqchip,
unsigned int first_irq,
irq_flow_handler_t handler,
unsigned int type,
+ bool nested,
struct lock_class_key *lock_key);
+/* FIXME: I assume threaded IRQchips do not have the lockdep problem */
+static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type)
+{
+ return _gpiochip_irqchip_add(gpiochip, irqchip, first_irq,
+ handler, type, true, NULL);
+}
+
#ifdef CONFIG_LOCKDEP
#define gpiochip_irqchip_add(...) \
( \
({ \
static struct lock_class_key _key; \
- _gpiochip_irqchip_add(__VA_ARGS__, &_key); \
+ _gpiochip_irqchip_add(__VA_ARGS__, false, &_key); \
}) \
)
#else
#define gpiochip_irqchip_add(...) \
- _gpiochip_irqchip_add(__VA_ARGS__, NULL)
+ _gpiochip_irqchip_add(__VA_ARGS__, false, NULL)
#endif
#endif /* CONFIG_GPIOLIB_IRQCHIP */
diff --git a/tools/gpio/gpio-hammer.c b/tools/gpio/gpio-hammer.c
index 37b3f141053d..f1eab587dfea 100644
--- a/tools/gpio/gpio-hammer.c
+++ b/tools/gpio/gpio-hammer.c
@@ -23,54 +23,31 @@
#include <getopt.h>
#include <sys/ioctl.h>
#include <linux/gpio.h>
+#include "gpio-utils.h"
int hammer_device(const char *device_name, unsigned int *lines, int nlines,
unsigned int loops)
{
- struct gpiohandle_request req;
struct gpiohandle_data data;
- char *chrdev_name;
char swirr[] = "-\\|/";
int fd;
int ret;
int i, j;
unsigned int iteration = 0;
- ret = asprintf(&chrdev_name, "/dev/%s", device_name);
+ memset(&data.values, 0, sizeof(data.values));
+ ret = gpiotools_request_linehandle(device_name, lines, nlines,
+ GPIOHANDLE_REQUEST_OUTPUT, &data,
+ "gpio-hammler");
if (ret < 0)
- return -ENOMEM;
+ goto exit_error;
+ else
+ fd = ret;
- fd = open(chrdev_name, 0);
- if (fd == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to open %s\n", chrdev_name);
- goto exit_close_error;
- }
-
- /* Request lines as output */
- for (i = 0; i < nlines; i++)
- req.lineoffsets[i] = lines[i];
- req.flags = GPIOHANDLE_REQUEST_OUTPUT; /* Request as output */
- strcpy(req.consumer_label, "gpio-hammer");
- req.lines = nlines;
- ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GET LINEHANDLE "
- "IOCTL (%d)\n",
- ret);
+ ret = gpiotools_get_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
- /* Read initial states */
- ret = ioctl(req.fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE GET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
- goto exit_close_error;
- }
fprintf(stdout, "Hammer lines [");
for (i = 0; i < nlines; i++) {
fprintf(stdout, "%d", lines[i]);
@@ -92,23 +69,14 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
for (i = 0; i < nlines; i++)
data.values[i] = !data.values[i];
- ret = ioctl(req.fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE SET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
+ ret = gpiotools_set_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
+
/* Re-read values to get status */
- ret = ioctl(req.fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &data);
- if (ret == -1) {
- ret = -errno;
- fprintf(stderr, "Failed to issue GPIOHANDLE GET LINE "
- "VALUES IOCTL (%d)\n",
- ret);
+ ret = gpiotools_get_values(fd, &data);
+ if (ret < 0)
goto exit_close_error;
- }
fprintf(stdout, "[%c] ", swirr[j]);
j++;
@@ -132,9 +100,8 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
ret = 0;
exit_close_error:
- if (close(fd) == -1)
- perror("Failed to close GPIO character device file");
- free(chrdev_name);
+ gpiotools_release_linehandle(fd);
+exit_error:
return ret;
}
diff --git a/tools/gpio/gpio-utils.c b/tools/gpio/gpio-utils.c
index 8208718f2c99..b86a32d90d88 100644
--- a/tools/gpio/gpio-utils.c
+++ b/tools/gpio/gpio-utils.c
@@ -2,10 +2,266 @@
* GPIO tools - helpers library for the GPIO tools
*
* Copyright (C) 2015 Linus Walleij
+ * Copyright (C) 2016 Bamvor Jian Zhang
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <sys/ioctl.h>
+#include <linux/gpio.h>
#include "gpio-utils.h"
+
+#define COMSUMER "gpio-utils"
+
+/**
+ * doc: Operation of gpio
+ *
+ * Provide the api of gpiochip for chardev interface. There are two
+ * types of api. The first one provide as same function as each
+ * ioctl, including request and release for lines of gpio, read/write
+ * the value of gpio. If the user want to do lots of read and write of
+ * lines of gpio, user should use this type of api.
+ *
+ * The second one provide the easy to use api for user. Each of the
+ * following api will request gpio lines, do the operation and then
+ * release these lines.
+ */
+/**
+ * gpiotools_request_linehandle() - request gpio lines in a gpiochip
+ * @device_name: The name of gpiochip without prefix "/dev/",
+ * such as "gpiochip0"
+ * @lines: An array desired lines, specified by offset
+ * index for the associated GPIO device.
+ * @nline: The number of lines to request.
+ * @flag: The new flag for requsted gpio. Reference
+ * "linux/gpio.h" for the meaning of flag.
+ * @data: Default value will be set to gpio when flag is
+ * GPIOHANDLE_REQUEST_OUTPUT.
+ * @consumer_label: The name of consumer, such as "sysfs",
+ * "powerkey". This is useful for other users to
+ * know who is using.
+ *
+ * Request gpio lines through the ioctl provided by chardev. User
+ * could call gpiotools_set_values() and gpiotools_get_values() to
+ * read and write respectively through the returned fd. Call
+ * gpiotools_release_linehandle() to release these lines after that.
+ *
+ * Return: On success return the fd;
+ * On failure return the errno.
+ */
+int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
+ unsigned int nlines, unsigned int flag,
+ struct gpiohandle_data *data,
+ const char *consumer_label)
+{
+ struct gpiohandle_request req;
+ char *chrdev_name;
+ int fd;
+ int i;
+ int ret;
+
+ ret = asprintf(&chrdev_name, "/dev/%s", device_name);
+ if (ret < 0)
+ return -ENOMEM;
+
+ fd = open(chrdev_name, 0);
+ if (fd == -1) {
+ ret = -errno;
+ fprintf(stderr, "Failed to open %s\n", chrdev_name);
+ goto exit_close_error;
+ }
+
+ for (i = 0; i < nlines; i++)
+ req.lineoffsets[i] = lines[i];
+
+ req.flags = flag;
+ strcpy(req.consumer_label, consumer_label);
+ req.lines = nlines;
+ if (flag & GPIOHANDLE_REQUEST_OUTPUT)
+ memcpy(req.default_values, data, sizeof(req.default_values));
+
+ ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req);
+ if (ret == -1) {
+ ret = -errno;
+ fprintf(stderr, "Failed to issue GET LINEHANDLE IOCTL (%d)\n",
+ ret);
+ }
+
+exit_close_error:
+ if (close(fd) == -1)
+ perror("Failed to close GPIO character device file");
+ free(chrdev_name);
+ return ret < 0 ? ret : req.fd;
+}
+/**
+ * gpiotools_set_values(): Set the value of gpio(s)
+ * @fd: The fd returned by
+ * gpiotools_request_linehandle().
+ * @data: The array of values want to set.
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_set_values(const int fd, struct gpiohandle_data *data)
+{
+ int ret;
+
+ ret = ioctl(fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, data);
+ if (ret == -1) {
+ ret = -errno;
+ fprintf(stderr, "Failed to issue %s (%d)\n",
+ "GPIOHANDLE_SET_LINE_VALUES_IOCTL", ret);
+ }
+
+ return ret;
+}
+
+/**
+ * gpiotools_get_values(): Get the value of gpio(s)
+ * @fd: The fd returned by
+ * gpiotools_request_linehandle().
+ * @data: The array of values get from hardware.
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_get_values(const int fd, struct gpiohandle_data *data)
+{
+ int ret;
+
+ ret = ioctl(fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, data);
+ if (ret == -1) {
+ ret = -errno;
+ fprintf(stderr, "Failed to issue %s (%d)\n",
+ "GPIOHANDLE_GET_LINE_VALUES_IOCTL", ret);
+ }
+
+ return ret;
+}
+
+/**
+ * gpiotools_release_linehandle(): Release the line(s) of gpiochip
+ * @fd: The fd returned by
+ * gpiotools_request_linehandle().
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_release_linehandle(const int fd)
+{
+ int ret;
+
+ ret = close(fd);
+ if (ret == -1) {
+ perror("Failed to close GPIO LINEHANDLE device file");
+ ret = -errno;
+ }
+
+ return ret;
+}
+
+/**
+ * gpiotools_get(): Get value from specific line
+ * @device_name: The name of gpiochip without prefix "/dev/",
+ * such as "gpiochip0"
+ * @line: number of line, such as 2.
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_get(const char *device_name, unsigned int line)
+{
+ struct gpiohandle_data data;
+ unsigned int lines[] = {line};
+
+ gpiotools_gets(device_name, lines, 1, &data);
+ return data.values[0];
+}
+
+
+/**
+ * gpiotools_gets(): Get values from specific lines.
+ * @device_name: The name of gpiochip without prefix "/dev/",
+ * such as "gpiochip0".
+ * @lines: An array desired lines, specified by offset
+ * index for the associated GPIO device.
+ * @nline: The number of lines to request.
+ * @data: The array of values get from gpiochip.
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_gets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data)
+{
+ int fd;
+ int ret;
+ int ret_close;
+
+ ret = gpiotools_request_linehandle(device_name, lines, nlines,
+ GPIOHANDLE_REQUEST_INPUT, data,
+ COMSUMER);
+ if (ret < 0)
+ return ret;
+
+ fd = ret;
+ ret = gpiotools_get_values(fd, data);
+ ret_close = gpiotools_release_linehandle(fd);
+ return ret < 0 ? ret : ret_close;
+}
+
+/**
+ * gpiotools_set(): Set value to specific line
+ * @device_name: The name of gpiochip without prefix "/dev/",
+ * such as "gpiochip0"
+ * @line: number of line, such as 2.
+ * @value: The value of gpio, must be 0(low) or 1(high).
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_set(const char *device_name, unsigned int line,
+ unsigned int value)
+{
+ struct gpiohandle_data data;
+ unsigned int lines[] = {line};
+
+ data.values[0] = value;
+ return gpiotools_sets(device_name, lines, 1, &data);
+}
+
+/**
+ * gpiotools_sets(): Set values to specific lines.
+ * @device_name: The name of gpiochip without prefix "/dev/",
+ * such as "gpiochip0".
+ * @lines: An array desired lines, specified by offset
+ * index for the associated GPIO device.
+ * @nline: The number of lines to request.
+ * @data: The array of values set to gpiochip, must be
+ * 0(low) or 1(high).
+ *
+ * Return: On success return 0;
+ * On failure return the errno.
+ */
+int gpiotools_sets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data)
+{
+ int ret;
+
+ ret = gpiotools_request_linehandle(device_name, lines, nlines,
+ GPIOHANDLE_REQUEST_OUTPUT, data,
+ COMSUMER);
+ if (ret < 0)
+ return ret;
+
+ return gpiotools_release_linehandle(ret);
+}
diff --git a/tools/gpio/gpio-utils.h b/tools/gpio/gpio-utils.h
index 5f57133b8c04..344ea041f8d4 100644
--- a/tools/gpio/gpio-utils.h
+++ b/tools/gpio/gpio-utils.h
@@ -24,4 +24,20 @@ static inline int check_prefix(const char *str, const char *prefix)
strncmp(str, prefix, strlen(prefix)) == 0;
}
+int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
+ unsigned int nlines, unsigned int flag,
+ struct gpiohandle_data *data,
+ const char *consumer_label);
+int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
+int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
+int gpiotools_release_linehandle(const int fd);
+
+int gpiotools_get(const char *device_name, unsigned int line);
+int gpiotools_gets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data);
+int gpiotools_set(const char *device_name, unsigned int line,
+ unsigned int value);
+int gpiotools_sets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data);
+
#endif /* _GPIO_UTILS_H_ */