diff options
author | Sergio Paracuellos <sergio.paracuellos@gmail.com> | 2020-12-08 10:55:23 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-08 11:58:01 +0300 |
commit | 518b466a21ad7fa1e338fa4ed9d180ef439d3bc0 (patch) | |
tree | 51666be90da326f570cfd9295c3fab1009ffda18 /drivers/staging | |
parent | 289fa46ac6111df61697495a736f2dac8fa4f23a (diff) | |
download | linux-518b466a21ad7fa1e338fa4ed9d180ef439d3bc0.tar.xz |
pinctrl: ralink: add a pinctrl driver for the rt2880 family
These Socs have 1-3 banks of 8-32 gpios. Rather then setting the muxing of each
pin individually, these socs have mux groups that when set will effect 1-N pins.
Pin groups have a 2, 4 or 8 different muxes.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20201208075523.7060-3-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
-rw-r--r-- | drivers/staging/Kconfig | 2 | ||||
-rw-r--r-- | drivers/staging/Makefile | 1 | ||||
-rw-r--r-- | drivers/staging/mt7621-pinctrl/Kconfig | 6 | ||||
-rw-r--r-- | drivers/staging/mt7621-pinctrl/Makefile | 4 | ||||
-rw-r--r-- | drivers/staging/mt7621-pinctrl/TODO | 6 | ||||
-rw-r--r-- | drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c | 370 |
6 files changed, 0 insertions, 389 deletions
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 9b7cb7c5766a..c42708e60afc 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -94,8 +94,6 @@ source "drivers/staging/mt7621-pci/Kconfig" source "drivers/staging/mt7621-pci-phy/Kconfig" -source "drivers/staging/mt7621-pinctrl/Kconfig" - source "drivers/staging/mt7621-dma/Kconfig" source "drivers/staging/ralink-gdma/Kconfig" diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index 38226737c9f3..ebcc646d7b51 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -37,7 +37,6 @@ obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/ obj-$(CONFIG_PI433) += pi433/ obj-$(CONFIG_PCI_MT7621) += mt7621-pci/ obj-$(CONFIG_PCI_MT7621_PHY) += mt7621-pci-phy/ -obj-$(CONFIG_PINCTRL_RT2880) += mt7621-pinctrl/ obj-$(CONFIG_SOC_MT7621) += mt7621-dma/ obj-$(CONFIG_DMA_RALINK) += ralink-gdma/ obj-$(CONFIG_SOC_MT7621) += mt7621-dts/ diff --git a/drivers/staging/mt7621-pinctrl/Kconfig b/drivers/staging/mt7621-pinctrl/Kconfig deleted file mode 100644 index f42974026480..000000000000 --- a/drivers/staging/mt7621-pinctrl/Kconfig +++ /dev/null @@ -1,6 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -config PINCTRL_RT2880 - bool "RT2800 pinctrl driver for RALINK/Mediatek SOCs" - depends on RALINK - select PINMUX - select GENERIC_PINCONF diff --git a/drivers/staging/mt7621-pinctrl/Makefile b/drivers/staging/mt7621-pinctrl/Makefile deleted file mode 100644 index 49445f40c3cd..000000000000 --- a/drivers/staging/mt7621-pinctrl/Makefile +++ /dev/null @@ -1,4 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_PINCTRL_RT2880) += pinctrl-rt2880.o - -ccflags-y += -I$(srctree)/drivers/pinctrl diff --git a/drivers/staging/mt7621-pinctrl/TODO b/drivers/staging/mt7621-pinctrl/TODO deleted file mode 100644 index b2c235a16d5c..000000000000 --- a/drivers/staging/mt7621-pinctrl/TODO +++ /dev/null @@ -1,6 +0,0 @@ - -- general code review and cleanup -- should probably be always selected by 'config RALINK' -- ensure device-tree requirements are documented - -Cc: NeilBrown <neil@brown.name> diff --git a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c deleted file mode 100644 index e61dbe186bc9..000000000000 --- a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c +++ /dev/null @@ -1,370 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2013 John Crispin <blogic@openwrt.org> - */ - -#include <linux/module.h> -#include <linux/device.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/of.h> -#include <linux/pinctrl/pinctrl.h> -#include <linux/pinctrl/pinconf.h> -#include <linux/pinctrl/pinconf-generic.h> -#include <linux/pinctrl/pinmux.h> -#include <linux/pinctrl/consumer.h> -#include <linux/pinctrl/machine.h> - -#include <asm/mach-ralink/ralink_regs.h> -#include <asm/mach-ralink/pinmux.h> -#include <asm/mach-ralink/mt7620.h> - -#include "core.h" -#include "pinctrl-utils.h" - -#define SYSC_REG_GPIO_MODE 0x60 -#define SYSC_REG_GPIO_MODE2 0x64 - -struct rt2880_priv { - struct device *dev; - - struct pinctrl_pin_desc *pads; - struct pinctrl_desc *desc; - - struct rt2880_pmx_func **func; - int func_count; - - struct rt2880_pmx_group *groups; - const char **group_names; - int group_count; - - u8 *gpio; - int max_pins; -}; - -static int rt2880_get_group_count(struct pinctrl_dev *pctrldev) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - return p->group_count; -} - -static const char *rt2880_get_group_name(struct pinctrl_dev *pctrldev, - unsigned int group) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - return (group >= p->group_count) ? NULL : p->group_names[group]; -} - -static int rt2880_get_group_pins(struct pinctrl_dev *pctrldev, - unsigned int group, - const unsigned int **pins, - unsigned int *num_pins) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - if (group >= p->group_count) - return -EINVAL; - - *pins = p->groups[group].func[0].pins; - *num_pins = p->groups[group].func[0].pin_count; - - return 0; -} - -static const struct pinctrl_ops rt2880_pctrl_ops = { - .get_groups_count = rt2880_get_group_count, - .get_group_name = rt2880_get_group_name, - .get_group_pins = rt2880_get_group_pins, - .dt_node_to_map = pinconf_generic_dt_node_to_map_all, - .dt_free_map = pinconf_generic_dt_free_map, -}; - -static int rt2880_pmx_func_count(struct pinctrl_dev *pctrldev) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - return p->func_count; -} - -static const char *rt2880_pmx_func_name(struct pinctrl_dev *pctrldev, - unsigned int func) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - return p->func[func]->name; -} - -static int rt2880_pmx_group_get_groups(struct pinctrl_dev *pctrldev, - unsigned int func, - const char * const **groups, - unsigned int * const num_groups) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - if (p->func[func]->group_count == 1) - *groups = &p->group_names[p->func[func]->groups[0]]; - else - *groups = p->group_names; - - *num_groups = p->func[func]->group_count; - - return 0; -} - -static int rt2880_pmx_group_enable(struct pinctrl_dev *pctrldev, - unsigned int func, unsigned int group) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - u32 mode = 0; - u32 reg = SYSC_REG_GPIO_MODE; - int i; - int shift; - - /* dont allow double use */ - if (p->groups[group].enabled) { - dev_err(p->dev, "%s is already enabled\n", - p->groups[group].name); - return -EBUSY; - } - - p->groups[group].enabled = 1; - p->func[func]->enabled = 1; - - shift = p->groups[group].shift; - if (shift >= 32) { - shift -= 32; - reg = SYSC_REG_GPIO_MODE2; - } - mode = rt_sysc_r32(reg); - mode &= ~(p->groups[group].mask << shift); - - /* mark the pins as gpio */ - for (i = 0; i < p->groups[group].func[0].pin_count; i++) - p->gpio[p->groups[group].func[0].pins[i]] = 1; - - /* function 0 is gpio and needs special handling */ - if (func == 0) { - mode |= p->groups[group].gpio << shift; - } else { - for (i = 0; i < p->func[func]->pin_count; i++) - p->gpio[p->func[func]->pins[i]] = 0; - mode |= p->func[func]->value << shift; - } - rt_sysc_w32(mode, reg); - - return 0; -} - -static int rt2880_pmx_group_gpio_request_enable(struct pinctrl_dev *pctrldev, - struct pinctrl_gpio_range *range, - unsigned int pin) -{ - struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev); - - if (!p->gpio[pin]) { - dev_err(p->dev, "pin %d is not set to gpio mux\n", pin); - return -EINVAL; - } - - return 0; -} - -static const struct pinmux_ops rt2880_pmx_group_ops = { - .get_functions_count = rt2880_pmx_func_count, - .get_function_name = rt2880_pmx_func_name, - .get_function_groups = rt2880_pmx_group_get_groups, - .set_mux = rt2880_pmx_group_enable, - .gpio_request_enable = rt2880_pmx_group_gpio_request_enable, -}; - -static struct pinctrl_desc rt2880_pctrl_desc = { - .owner = THIS_MODULE, - .name = "rt2880-pinmux", - .pctlops = &rt2880_pctrl_ops, - .pmxops = &rt2880_pmx_group_ops, -}; - -static struct rt2880_pmx_func gpio_func = { - .name = "gpio", -}; - -static int rt2880_pinmux_index(struct rt2880_priv *p) -{ - struct rt2880_pmx_func **f; - struct rt2880_pmx_group *mux = p->groups; - int i, j, c = 0; - - /* count the mux functions */ - while (mux->name) { - p->group_count++; - mux++; - } - - /* allocate the group names array needed by the gpio function */ - p->group_names = devm_kcalloc(p->dev, p->group_count, - sizeof(char *), GFP_KERNEL); - if (!p->group_names) - return -1; - - for (i = 0; i < p->group_count; i++) { - p->group_names[i] = p->groups[i].name; - p->func_count += p->groups[i].func_count; - } - - /* we have a dummy function[0] for gpio */ - p->func_count++; - - /* allocate our function and group mapping index buffers */ - f = p->func = devm_kcalloc(p->dev, - p->func_count, - sizeof(*p->func), - GFP_KERNEL); - gpio_func.groups = devm_kcalloc(p->dev, p->group_count, sizeof(int), - GFP_KERNEL); - if (!f || !gpio_func.groups) - return -1; - - /* add a backpointer to the function so it knows its group */ - gpio_func.group_count = p->group_count; - for (i = 0; i < gpio_func.group_count; i++) - gpio_func.groups[i] = i; - - f[c] = &gpio_func; - c++; - - /* add remaining functions */ - for (i = 0; i < p->group_count; i++) { - for (j = 0; j < p->groups[i].func_count; j++) { - f[c] = &p->groups[i].func[j]; - f[c]->groups = devm_kzalloc(p->dev, sizeof(int), - GFP_KERNEL); - f[c]->groups[0] = i; - f[c]->group_count = 1; - c++; - } - } - return 0; -} - -static int rt2880_pinmux_pins(struct rt2880_priv *p) -{ - int i, j; - - /* - * loop over the functions and initialize the pins array. - * also work out the highest pin used. - */ - for (i = 0; i < p->func_count; i++) { - int pin; - - if (!p->func[i]->pin_count) - continue; - - p->func[i]->pins = devm_kcalloc(p->dev, - p->func[i]->pin_count, - sizeof(int), - GFP_KERNEL); - for (j = 0; j < p->func[i]->pin_count; j++) - p->func[i]->pins[j] = p->func[i]->pin_first + j; - - pin = p->func[i]->pin_first + p->func[i]->pin_count; - if (pin > p->max_pins) - p->max_pins = pin; - } - - /* the buffer that tells us which pins are gpio */ - p->gpio = devm_kcalloc(p->dev, p->max_pins, sizeof(u8), GFP_KERNEL); - /* the pads needed to tell pinctrl about our pins */ - p->pads = devm_kcalloc(p->dev, p->max_pins, - sizeof(struct pinctrl_pin_desc), GFP_KERNEL); - if (!p->pads || !p->gpio) { - dev_err(p->dev, "Failed to allocate gpio data\n"); - return -ENOMEM; - } - - memset(p->gpio, 1, sizeof(u8) * p->max_pins); - for (i = 0; i < p->func_count; i++) { - if (!p->func[i]->pin_count) - continue; - - for (j = 0; j < p->func[i]->pin_count; j++) - p->gpio[p->func[i]->pins[j]] = 0; - } - - /* pin 0 is always a gpio */ - p->gpio[0] = 1; - - /* set the pads */ - for (i = 0; i < p->max_pins; i++) { - /* strlen("ioXY") + 1 = 5 */ - char *name = devm_kzalloc(p->dev, 5, GFP_KERNEL); - - if (!name) - return -ENOMEM; - snprintf(name, 5, "io%d", i); - p->pads[i].number = i; - p->pads[i].name = name; - } - p->desc->pins = p->pads; - p->desc->npins = p->max_pins; - - return 0; -} - -static int rt2880_pinmux_probe(struct platform_device *pdev) -{ - struct rt2880_priv *p; - struct pinctrl_dev *dev; - - if (!rt2880_pinmux_data) - return -ENOTSUPP; - - /* setup the private data */ - p = devm_kzalloc(&pdev->dev, sizeof(struct rt2880_priv), GFP_KERNEL); - if (!p) - return -ENOMEM; - - p->dev = &pdev->dev; - p->desc = &rt2880_pctrl_desc; - p->groups = rt2880_pinmux_data; - platform_set_drvdata(pdev, p); - - /* init the device */ - if (rt2880_pinmux_index(p)) { - dev_err(&pdev->dev, "failed to load index\n"); - return -EINVAL; - } - if (rt2880_pinmux_pins(p)) { - dev_err(&pdev->dev, "failed to load pins\n"); - return -EINVAL; - } - dev = pinctrl_register(p->desc, &pdev->dev, p); - if (IS_ERR(dev)) - return PTR_ERR(dev); - - return 0; -} - -static const struct of_device_id rt2880_pinmux_match[] = { - { .compatible = "ralink,rt2880-pinmux" }, - {}, -}; -MODULE_DEVICE_TABLE(of, rt2880_pinmux_match); - -static struct platform_driver rt2880_pinmux_driver = { - .probe = rt2880_pinmux_probe, - .driver = { - .name = "rt2880-pinmux", - .of_match_table = rt2880_pinmux_match, - }, -}; - -int __init rt2880_pinmux_init(void) -{ - return platform_driver_register(&rt2880_pinmux_driver); -} - -core_initcall_sync(rt2880_pinmux_init); |