mirror of
https://github.com/edk2-porting/linux-next.git
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c7c8518498
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6: (61 commits) gpio/mxc/mxs: fix build error introduced by the irq_gc_ack() renaming mcp23s08: add i2c support mcp23s08: isolate spi specific parts mcp23s08: get rid of setup/teardown callbacks gpio/tegra: dt: add binding for gpio polarity mcp23s08: remove unused work queue gpio/da9052: remove a redundant assignment for gpio->da9052 gpio/mxc: add device tree probe support ARM: mxc: use ARCH_NR_GPIOS to define gpio number gpio/mxc: get rid of the uses of cpu_is_mx() gpio/mxc: add missing initialization of basic_mmio_gpio shadow variables gpio: Move mpc5200 gpio driver to drivers/gpio GPIO: DA9052 GPIO module v3 gpio/tegra: Use engineering names in DT compatible property of/gpio: Add new method for getting gpios under different property names gpio/dt: Refine GPIO device tree binding gpio/ml-ioh: fix off-by-one for displaying variable i in dev_err gpio/pca953x: Deprecate meaningless device-tree bindings gpio/pca953x: Remove dynamic platform data pointer gpio/pca953x: Fix IRQ support. ...
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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