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