/* * 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; }; static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset) { struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio); 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 *tps65912 = container_of(gc, struct tps65912, gpio); 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 *tps65912 = container_of(gc, struct tps65912, gpio); /* 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 *tps65912 = container_of(gc, struct tps65912, gpio); 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 = 1, .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); return gpiochip_remove(&tps65912_gpio->gpio_chip); } static struct platform_driver tps65912_gpio_driver = { .driver = { .name = "tps65912-gpio", .owner = THIS_MODULE, }, .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");