157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
/*
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* Copyright 2011 Texas Instruments Inc.
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*
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* Author: Margarita Olaya <magi@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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* This driver is based on wm8350 implementation.
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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/mfd/core.h>
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/mfd/tps65912.h>
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struct tps65912_gpio_data {
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struct tps65912 *tps65912;
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struct gpio_chip gpio_chip;
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};
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static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
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int val;
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val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
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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 tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
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if (value)
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tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
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GPIO_SET_MASK);
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else
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tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
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GPIO_SET_MASK);
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}
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static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
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/* Set the initial value */
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tps65912_gpio_set(gc, offset, value);
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return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
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GPIO_CFG_MASK);
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}
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static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
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return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
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GPIO_CFG_MASK);
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}
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static struct gpio_chip template_chip = {
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.label = "tps65912",
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.owner = THIS_MODULE,
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.direction_input = tps65912_gpio_input,
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.direction_output = tps65912_gpio_output,
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.get = tps65912_gpio_get,
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.set = tps65912_gpio_set,
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.can_sleep = 1,
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.ngpio = 5,
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.base = -1,
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};
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static int __devinit tps65912_gpio_probe(struct platform_device *pdev)
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{
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struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
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struct tps65912_board *pdata = tps65912->dev->platform_data;
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struct tps65912_gpio_data *tps65912_gpio;
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int ret;
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tps65912_gpio = kzalloc(sizeof(*tps65912_gpio), GFP_KERNEL);
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if (tps65912_gpio == NULL)
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return -ENOMEM;
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tps65912_gpio->tps65912 = tps65912;
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tps65912_gpio->gpio_chip = template_chip;
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tps65912_gpio->gpio_chip.dev = &pdev->dev;
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if (pdata && pdata->gpio_base)
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tps65912_gpio->gpio_chip.base = pdata->gpio_base;
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ret = gpiochip_add(&tps65912_gpio->gpio_chip);
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if (ret < 0) {
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dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
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goto err;
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}
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platform_set_drvdata(pdev, tps65912_gpio);
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return ret;
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err:
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kfree(tps65912_gpio);
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return ret;
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}
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static int __devexit tps65912_gpio_remove(struct platform_device *pdev)
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{
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struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
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int ret;
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ret = gpiochip_remove(&tps65912_gpio->gpio_chip);
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if (ret == 0)
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kfree(tps65912_gpio);
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return ret;
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}
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static struct platform_driver tps65912_gpio_driver = {
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.driver = {
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.name = "tps65912-gpio",
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.owner = THIS_MODULE,
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},
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.probe = tps65912_gpio_probe,
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.remove = __devexit_p(tps65912_gpio_remove),
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};
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static int __init tps65912_gpio_init(void)
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{
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return platform_driver_register(&tps65912_gpio_driver);
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}
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subsys_initcall(tps65912_gpio_init);
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static void __exit tps65912_gpio_exit(void)
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{
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platform_driver_unregister(&tps65912_gpio_driver);
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}
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module_exit(tps65912_gpio_exit);
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MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
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MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tps65912-gpio");
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