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drivers/gpio/gpio-tps65910.c
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/* |
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* TI TPS6591x GPIO driver |
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* * 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; |
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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; 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) |
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tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_SET_MASK); |
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else |
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tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_SET_MASK); |
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} 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); |
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return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_CFG_MASK); |
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} static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) { struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); |
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return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_CFG_MASK); |
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} 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; |
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switch(tps65910_chip_id(tps65910)) { case TPS65910: tps65910->gpio.ngpio = 6; |
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break; |
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case TPS65911: tps65910->gpio.ngpio = 9; |
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break; |
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default: return; } |
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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 ", ret); } |