Add support for the TPS65086 PMIC GPOs. TPS65086 has four configurable GPOs that can be used for several purposes. Signed-off-by: Andrew F. Davis <afd@xxxxxx> --- drivers/gpio/Kconfig | 6 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tps65086.c | 114 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 121 insertions(+) create mode 100644 drivers/gpio/gpio-tps65086.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index b4fc9e4..c585d42 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -824,6 +824,12 @@ config GPIO_TIMBERDALE ---help--- Add support for the GPIO IP in the timberdale FPGA. +config GPIO_TPS65086 + tristate "TI TPS65086 GPO" + depends on MFD_TPS65086 + help + This driver supports the GPO on the TI TPS65086 PMIC. + config GPIO_TPS6586X bool "TPS6586X GPIO" depends on MFD_TPS6586X diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index f79a7c4..2611c7e 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -94,6 +94,7 @@ obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o +obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o diff --git a/drivers/gpio/gpio-tps65086.c b/drivers/gpio/gpio-tps65086.c new file mode 100644 index 0000000..9fba758 --- /dev/null +++ b/drivers/gpio/gpio-tps65086.c @@ -0,0 +1,114 @@ +/* + * TI TPS65086x GPIO Driver + * + * 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 TPS65912 driver + */ + +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/of_device.h> + +#include <linux/mfd/tps65086.h> + +struct tps65086_gpio { + struct gpio_chip gpio_chip; + struct tps65086 *tps; +}; + +#define to_tps65086_gpio(gc) container_of(gc, struct tps65086_gpio, gpio_chip) + +static int tps65086_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct tps65086_gpio *gpio = to_tps65086_gpio(gc); + int ret, val; + + ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val); + if (ret < 0) + return ret; + + return val & BIT(4 + offset); +} + +static void tps65086_gpio_set(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps65086_gpio *gpio = to_tps65086_gpio(gc); + + regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL, + BIT(4 + offset), value ? BIT(4 + offset) : 0); +} + +static struct gpio_chip template_chip = { + .label = "tps65086-gpio", + .owner = THIS_MODULE, + .get = tps65086_gpio_get, + .set = tps65086_gpio_set, + .can_sleep = true, + .ngpio = 4, + .base = -1, +}; + +static int tps65086_gpio_probe(struct platform_device *pdev) +{ + struct tps65086_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; + 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 tps65086_gpio_remove(struct platform_device *pdev) +{ + struct tps65086_gpio *gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&gpio->gpio_chip); + + return 0; +} + +static const struct of_device_id tps65086_gpio_of_match_table[] = { + { .compatible = "ti,tps65086-gpio", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, tps65086_gpio_of_match_table); + +static struct platform_driver tps65086_gpio_driver = { + .driver = { + .name = "tps65086-gpio", + .of_match_table = tps65086_gpio_of_match_table, + }, + .probe = tps65086_gpio_probe, + .remove = tps65086_gpio_remove, +}; + +module_platform_driver(tps65086_gpio_driver); + +MODULE_AUTHOR("Andrew F. Davis <afd@xxxxxx>"); +MODULE_DESCRIPTION("TPS65086 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
