This patch adds support for the TPS65912 PMIC GPIOs. TPS65912 has five configurable GPIOs that can be used for several purposes. Signed-off-by: Andrew F. Davis <afd@xxxxxx> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> --- drivers/gpio/Kconfig | 6 ++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tps65912.c | 164 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 171 insertions(+) create mode 100644 drivers/gpio/gpio-tps65912.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 131a89b..a5fab31 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -852,6 +852,12 @@ config GPIO_TPS65910 Select this option to enable GPIO driver for the TPS65910 chip family. +config GPIO_TPS65912 + tristate "TI TPS65912 GPIO" + depends on MFD_TPS65912 + help + This driver supports TPS65912 gpio chip + config GPIO_TWL4030 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" depends on TWL4030_CORE diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index f13b59f..986dbd8 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -97,6 +97,7 @@ obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o +obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o diff --git a/drivers/gpio/gpio-tps65912.c b/drivers/gpio/gpio-tps65912.c new file mode 100644 index 0000000..41e1a72 --- /dev/null +++ b/drivers/gpio/gpio-tps65912.c @@ -0,0 +1,164 @@ +/* + * GPIO driver for TI TPS65912x PMICs + * + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ + * + * Author: Andrew F. Davis <afd@xxxxxx> + * + * 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. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether expressed or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License version 2 for more details. + * + * Based on the Arizona GPIO driver and the previous TPS65912 driver by + * Margarita Olaya Cabrera <magi@xxxxxxxxxxxxxxx> + */ + +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <linux/mfd/tps65912.h> + +struct tps65912_gpio { + struct gpio_chip gpio_chip; + struct tps65912 *tps; +}; + +static inline struct tps65912_gpio *to_tps65912_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct tps65912_gpio, gpio_chip); +} + +static int tps65912_gpio_get_direction(struct gpio_chip *gc, + unsigned offset) +{ + struct tps65912_gpio *gpio = to_tps65912_gpio(gc); + + int ret, val; + + ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); + if (ret) + return ret; + + if (val & GPIO_CFG_MASK) + return GPIOF_DIR_OUT; + else + return GPIOF_DIR_IN; +} + +static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{ + struct tps65912_gpio *gpio = to_tps65912_gpio(gc); + + return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, + GPIO_CFG_MASK, 0); +} + +static int tps65912_gpio_direction_output(struct gpio_chip *gc, + unsigned offset, int value) +{ + struct tps65912_gpio *gpio = to_tps65912_gpio(gc); + + /* Set the initial value */ + regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, + GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); + + return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, + GPIO_CFG_MASK, GPIO_CFG_MASK); +} + +static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct tps65912_gpio *gpio = to_tps65912_gpio(gc); + int ret, val; + + ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); + if (ret) + return ret; + + if (val & GPIO_STS_MASK) + return 1; + + return 0; +} + +static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps65912_gpio *gpio = to_tps65912_gpio(gc); + + regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, + GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); +} + +static struct gpio_chip template_chip = { + .label = "tps65912-gpio", + .owner = THIS_MODULE, + .get_direction = tps65912_gpio_get_direction, + .direction_input = tps65912_gpio_direction_input, + .direction_output = tps65912_gpio_direction_output, + .get = tps65912_gpio_get, + .set = tps65912_gpio_set, + .base = -1, + .ngpio = 5, + .can_sleep = true, +}; + +static int tps65912_gpio_probe(struct platform_device *pdev) +{ + struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent); + struct tps65912_gpio *gpio; + int ret; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + gpio->tps = dev_get_drvdata(pdev->dev.parent); + gpio->gpio_chip = template_chip; + gpio->gpio_chip.dev = tps->dev; + + ret = gpiochip_add(&gpio->gpio_chip); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, gpio); + + return 0; +} + +static int tps65912_gpio_remove(struct platform_device *pdev) +{ + struct tps65912_gpio *gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&gpio->gpio_chip); + + return 0; +} + +static const struct platform_device_id tps65912_gpio_id_table[] = { + { "tps65912-gpio", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table); + +static struct platform_driver tps65912_gpio_driver = { + .driver = { + .name = "tps65912-gpio", + }, + .probe = tps65912_gpio_probe, + .remove = tps65912_gpio_remove, + .id_table = tps65912_gpio_id_table, +}; +module_platform_driver(tps65912_gpio_driver); + +MODULE_AUTHOR("Andrew F. Davis <afd@xxxxxx>"); +MODULE_DESCRIPTION("TPS65912 GPIO driver"); +MODULE_LICENSE("GPL v2"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
