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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-17 23:32:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-17 23:32:01 +0300
commit58cf279acac3080ce03eeea5ca268210b3165fe1 (patch)
tree54997706fbfea2cd9fd4c4044edbd8ecdc154dfb /drivers/leds
parent6606b342febfd470b4a33acb73e360eeaca1d9bb (diff)
parentc474e348778bdf5b453a2cdff4b2b1f9e000f343 (diff)
downloadlinux-58cf279acac3080ce03eeea5ca268210b3165fe1.tar.xz
Merge tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij: "Here is the bulk of GPIO changes for v4.5. Notably there are big refactorings mostly by myself, aimed at getting the gpio_chip into a shape that makes me believe I can proceed to preserve state for a proper userspace ABI (character device) that has already been proposed once, but resulted in the feedback that I need to go back and restructure stuff. So I've been restructuring stuff. On the way I ran into brokenness (return code from the get_value() callback) and had to fix it. Also, refactored generic GPIO to be simpler. Some of that is still waiting to trickle down from the subsystems all over the kernel that provide random gpio_chips, I've touched every single GPIO driver in the kernel now, oh man I didn't know I was responsible for so much... Apart from that we're churning along as usual. I took some effort to test and retest so it should merge nicely and we shook out a couple of bugs in -next. Infrastructural changes: - In struct gpio_chip, rename the .dev node to .parent to better reflect the fact that this is not the GPIO struct device abstraction. We will add that soon so this would be totallt confusing. - It was noted that the driver .get_value() callbacks was sometimes reporting negative -ERR values to the gpiolib core, expecting them to be propagated to consumer gpiod_get_value() and gpio_get_value() calls. This was not happening, so as there was a mess of drivers returning negative errors and some returning "anything else than zero" to indicate that a line was active. As some would have bit 31 set to indicate "line active" it clashed with negative error codes. This is fixed by the largeish series clamping values in all drivers with !!value to [0,1] and then augmenting the code to propagate error codes to consumers. (Includes some ACKed patches in other subsystems.) - Add a void *data pointer to struct gpio_chip. The container_of() design pattern is indeed very nice, but we want to reform the struct gpio_chip to be a non-volative, stateless business, and keep states internal to the gpiolib to be able to hold on to the state when adding a proper userspace ABI (character device) further down the road. To achieve this, drivers need a handle at the internal state that is not dependent on their struct gpio_chip() so we add gpiochip_add_data() and gpiochip_get_data() following the pattern of many other subsystems. All the "use gpiochip data pointer" patches transforms drivers to this scheme. - The Generic GPIO chip header has been merged into the general <linux/gpio/driver.h> header, and the custom header for that removed. Instead of having a separate mm_gpio_chip struct for these generic drivers, merge that into struct gpio_chip, simplifying the code and removing the need for separate and confusing includes. Misc improvements: - Stabilize the way GPIOs are looked up from the ACPI legacy specification. - Incremental driver features for PXA, PCA953X, Lantiq (patches from the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48 New drivers: - Add a GPIO chip to the ALSA SoC AC97 driver. - Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir, but the branch is merged here too to account for infrastructural changes). - The sx150x driver now supports the sx1502" * tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits) gpio: generic: make bgpio_pdata always visible gpiolib: fix chip order in gpio list gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs() gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs() gpio: brcmstb: Allow building driver for BMIPS_GENERIC gpio: brcmstb: Set endian flags for big-endian MIPS gpio: moxart: fix build regression gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs() leds: pca9532: use gpiochip data pointer leds: tca6507: use gpiochip data pointer hid: cp2112: use gpiochip data pointer bcma: gpio: use gpiochip data pointer avr32: gpio: use gpiochip data pointer video: fbdev: via: use gpiochip data pointer gpio: pch: Optimize pch_gpio_get() Revert "pinctrl: lantiq: Implement gpio_chip.to_irq" pinctrl: nsp-gpio: use gpiochip data pointer pinctrl: vt8500-wmt: use gpiochip data pointer pinctrl: exynos5440: use gpiochip data pointer pinctrl: at91-pio4: use gpiochip data pointer ...
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pca9532.c14
-rw-r--r--drivers/leds/leds-tca6507.c6
2 files changed, 10 insertions, 10 deletions
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 17c63ec9fb9e..e3d3b1aaa9e0 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -242,7 +242,7 @@ static void pca9532_input_work(struct work_struct *work)
#ifdef CONFIG_LEDS_PCA9532_GPIO
static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
{
- struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ struct pca9532_data *data = gpiochip_get_data(gc);
struct pca9532_led *led = &data->leds[offset];
if (led->type == PCA9532_TYPE_GPIO)
@@ -253,7 +253,7 @@ static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
{
- struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ struct pca9532_data *data = gpiochip_get_data(gc);
struct pca9532_led *led = &data->leds[offset];
if (val)
@@ -266,7 +266,7 @@ static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int va
static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
{
- struct pca9532_data *data = container_of(gc, struct pca9532_data, gpio);
+ struct pca9532_data *data = gpiochip_get_data(gc);
unsigned char reg;
reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
@@ -315,7 +315,7 @@ static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
- if (data->gpio.dev)
+ if (data->gpio.parent)
gpiochip_remove(&data->gpio);
#endif
@@ -409,13 +409,13 @@ static int pca9532_configure(struct i2c_client *client,
data->gpio.can_sleep = 1;
data->gpio.base = pdata->gpio_base;
data->gpio.ngpio = data->chip_info->num_leds;
- data->gpio.dev = &client->dev;
+ data->gpio.parent = &client->dev;
data->gpio.owner = THIS_MODULE;
- err = gpiochip_add(&data->gpio);
+ err = gpiochip_add_data(&data->gpio, data);
if (err) {
/* Use data->gpio.dev as a flag for freeing gpiochip */
- data->gpio.dev = NULL;
+ data->gpio.parent = NULL;
dev_warn(&client->dev, "could not add gpiochip\n");
} else {
dev_info(&client->dev, "gpios %i...%i\n",
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index edbecc4ca2da..c548ea10f0f0 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -603,7 +603,7 @@ static int tca6507_blink_set(struct led_classdev *led_cdev,
static void tca6507_gpio_set_value(struct gpio_chip *gc,
unsigned offset, int val)
{
- struct tca6507_chip *tca = container_of(gc, struct tca6507_chip, gpio);
+ struct tca6507_chip *tca = gpiochip_get_data(gc);
unsigned long flags;
spin_lock_irqsave(&tca->lock, flags);
@@ -651,11 +651,11 @@ static int tca6507_probe_gpios(struct i2c_client *client,
tca->gpio.owner = THIS_MODULE;
tca->gpio.direction_output = tca6507_gpio_direction_output;
tca->gpio.set = tca6507_gpio_set_value;
- tca->gpio.dev = &client->dev;
+ tca->gpio.parent = &client->dev;
#ifdef CONFIG_OF_GPIO
tca->gpio.of_node = of_node_get(client->dev.of_node);
#endif
- err = gpiochip_add(&tca->gpio);
+ err = gpiochip_add_data(&tca->gpio, tca);
if (err) {
tca->gpio.ngpio = 0;
return err;