103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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* TI TPS6591x GPIO driver
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*
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* Copyright 2010 Texas Instruments Inc.
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*
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/mfd/tps65910.h>
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static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
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uint8_t val;
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tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);
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if (val & GPIO_STS_MASK)
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return 1;
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return 0;
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}
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static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
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if (value)
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tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
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GPIO_SET_MASK);
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else
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tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
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GPIO_SET_MASK);
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}
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static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
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/* Set the initial value */
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tps65910_gpio_set(gc, 0, value);
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return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
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GPIO_CFG_MASK);
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}
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static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
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return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
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GPIO_CFG_MASK);
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}
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void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
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{
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int ret;
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if (!gpio_base)
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return;
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tps65910->gpio.owner = THIS_MODULE;
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tps65910->gpio.label = tps65910->i2c_client->name;
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tps65910->gpio.dev = tps65910->dev;
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tps65910->gpio.base = gpio_base;
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switch(tps65910_chip_id(tps65910)) {
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case TPS65910:
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tps65910->gpio.ngpio = 6;
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break;
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case TPS65911:
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tps65910->gpio.ngpio = 9;
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break;
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default:
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return;
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}
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tps65910->gpio.can_sleep = 1;
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tps65910->gpio.direction_input = tps65910_gpio_input;
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tps65910->gpio.direction_output = tps65910_gpio_output;
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tps65910->gpio.set = tps65910_gpio_set;
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tps65910->gpio.get = tps65910_gpio_get;
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ret = gpiochip_add(&tps65910->gpio);
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if (ret)
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dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
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}
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