2 * Copyright 2011 Texas Instruments Inc.
4 * Author: Margarita Olaya <magi@slimlogic.co.uk>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * This driver is based on wm8350 implementation.
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/gpio.h>
18 #include <linux/mfd/core.h>
19 #include <linux/platform_device.h>
20 #include <linux/seq_file.h>
21 #include <linux/slab.h>
22 #include <linux/mfd/tps65912.h>
24 struct tps65912_gpio_data {
25 struct tps65912 *tps65912;
26 struct gpio_chip gpio_chip;
29 static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
31 struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
34 val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
36 if (val & GPIO_STS_MASK)
42 static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
45 struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
48 tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
51 tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
55 static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
58 struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
60 /* Set the initial value */
61 tps65912_gpio_set(gc, offset, value);
63 return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
67 static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
69 struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
71 return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
75 static struct gpio_chip template_chip = {
78 .direction_input = tps65912_gpio_input,
79 .direction_output = tps65912_gpio_output,
80 .get = tps65912_gpio_get,
81 .set = tps65912_gpio_set,
87 static int tps65912_gpio_probe(struct platform_device *pdev)
89 struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
90 struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
91 struct tps65912_gpio_data *tps65912_gpio;
94 tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
96 if (tps65912_gpio == NULL)
99 tps65912_gpio->tps65912 = tps65912;
100 tps65912_gpio->gpio_chip = template_chip;
101 tps65912_gpio->gpio_chip.dev = &pdev->dev;
102 if (pdata && pdata->gpio_base)
103 tps65912_gpio->gpio_chip.base = pdata->gpio_base;
105 ret = gpiochip_add(&tps65912_gpio->gpio_chip);
107 dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
111 platform_set_drvdata(pdev, tps65912_gpio);
116 static int tps65912_gpio_remove(struct platform_device *pdev)
118 struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
120 return gpiochip_remove(&tps65912_gpio->gpio_chip);
123 static struct platform_driver tps65912_gpio_driver = {
125 .name = "tps65912-gpio",
126 .owner = THIS_MODULE,
128 .probe = tps65912_gpio_probe,
129 .remove = tps65912_gpio_remove,
132 static int __init tps65912_gpio_init(void)
134 return platform_driver_register(&tps65912_gpio_driver);
136 subsys_initcall(tps65912_gpio_init);
138 static void __exit tps65912_gpio_exit(void)
140 platform_driver_unregister(&tps65912_gpio_driver);
142 module_exit(tps65912_gpio_exit);
144 MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
145 MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
146 MODULE_LICENSE("GPL v2");
147 MODULE_ALIAS("platform:tps65912-gpio");