From 2537df722d338ab687d7ed91dc589265c0d14aec Mon Sep 17 00:00:00 2001 From: Graeme Gregory Date: Mon, 2 May 2011 16:19:52 -0500 Subject: [PATCH] TPS65910: GPIO: Add GPIO driver TPS65910 has one configurable GPIO that can be used for several purposes. Subsequent versions of the TPS chip support more than one GPIO. Signed-off-by: Graeme Gregory Signed-off-by: Jorge Eduardo Candelaria Acked-by: Grant Likely Signed-off-by: Liam Girdwood --- drivers/mfd/Makefile | 2 +- drivers/mfd/tps65910-gpio.c | 91 ++++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/tps65910.c | 7 ++++ include/linux/mfd/tps65910.h | 2 + 4 files changed, 101 insertions(+), 1 deletion(-) create mode 100644 drivers/mfd/tps65910-gpio.c diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index f43ef5b..c64fa8d 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -93,4 +93,4 @@ obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o -obj-$(CONFIG_MFD_TPS65910) += tps65910.o +obj-$(CONFIG_MFD_TPS65910) += tps65910.o tps65910-gpio.o diff --git a/drivers/mfd/tps65910-gpio.c b/drivers/mfd/tps65910-gpio.c new file mode 100644 index 0000000..f3ae376 --- /dev/null +++ b/drivers/mfd/tps65910-gpio.c @@ -0,0 +1,91 @@ +/* + * tps65910-gpio.c -- TI TPS6591x + * + * Copyright 2010 Texas Instruments Inc. + * + * Author: Graeme Gregory + * Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include +#include +#include +#include +#include +#include + +static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + uint8_t val; + + tps65910->read(tps65910, TPS65910_GPIO0, 1, &val); + + if (val & GPIO0_GPIO_STS_MASK) + return 1; + + return 0; +} + +static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + + if (value) + tps65910_set_bits(tps65910, TPS65910_GPIO0, + GPIO0_GPIO_SET_MASK); + else + tps65910_clear_bits(tps65910, TPS65910_GPIO0, + GPIO0_GPIO_SET_MASK); +} + +static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + + /* Set the initial value */ + tps65910_gpio_set(gc, 0, value); + + return tps65910_set_bits(tps65910, TPS65910_GPIO0, GPIO0_GPIO_CFG_MASK); +} + +static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) +{ + struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + + return tps65910_clear_bits(tps65910, TPS65910_GPIO0, + GPIO0_GPIO_CFG_MASK); +} + +void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base) +{ + int ret; + + if (!gpio_base) + return; + + tps65910->gpio.owner = THIS_MODULE; + tps65910->gpio.label = tps65910->i2c_client->name; + tps65910->gpio.dev = tps65910->dev; + tps65910->gpio.base = gpio_base; + tps65910->gpio.ngpio = 1; + tps65910->gpio.can_sleep = 1; + + tps65910->gpio.direction_input = tps65910_gpio_input; + tps65910->gpio.direction_output = tps65910_gpio_output; + tps65910->gpio.set = tps65910_gpio_set; + tps65910->gpio.get = tps65910_gpio_get; + + ret = gpiochip_add(&tps65910->gpio); + + if (ret) + dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret); +} diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c index dbcdfb5..5a6a7be 100644 --- a/drivers/mfd/tps65910.c +++ b/drivers/mfd/tps65910.c @@ -135,8 +135,13 @@ static int tps65910_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct tps65910 *tps65910; + struct tps65910_board *pmic_plat_data; int ret = 0; + pmic_plat_data = dev_get_platdata(&i2c->dev); + if (!pmic_plat_data) + return -EINVAL; + tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL); if (tps65910 == NULL) return -ENOMEM; @@ -154,6 +159,8 @@ static int tps65910_i2c_probe(struct i2c_client *i2c, if (ret < 0) goto err; + tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base); + return ret; err: diff --git a/include/linux/mfd/tps65910.h b/include/linux/mfd/tps65910.h index fa1b029..0e01d50 100644 --- a/include/linux/mfd/tps65910.h +++ b/include/linux/mfd/tps65910.h @@ -714,6 +714,7 @@ */ struct tps65910_board { + int gpio_base; struct regulator_init_data *tps65910_pmic_init_data; }; @@ -749,5 +750,6 @@ struct tps65910_platform_data { int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask); int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask); +void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base); #endif /* __LINUX_MFD_TPS65910_H */ -- 2.7.4