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Commit 2537df72 authored by Graeme Gregory's avatar Graeme Gregory Committed by Liam Girdwood
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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: default avatarGraeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: default avatarJorge Eduardo Candelaria <jedu@slimlogic.co.uk>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 27c6750e

drivers/mfd/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/mfd/tps65910-gpio.c

0 → 100644
+91 −0
Original line number Diff line number Diff line 
/*

 * tps65910-gpio.c  --  TI TPS6591x

 *

 * Copyright 2010 Texas Instruments Inc.

 *

 * Author: Graeme Gregory <gg@slimlogic.co.uk>

 * 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 <linux/kernel.h>

#include <linux/module.h>

#include <linux/errno.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/mfd/tps65910.h>



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);

}

drivers/mfd/tps65910.c

+7 −0
Original line number Diff line number Diff line
@@ -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:

include/linux/mfd/tps65910.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */