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_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
32 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
35 val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
37 if (val & GPIO_STS_MASK)
43 static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
46 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
47 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
50 tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
53 tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
57 static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
60 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
61 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
63 /* Set the initial value */
64 tps65912_gpio_set(gc, offset, value);
66 return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
70 static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
72 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
73 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
75 return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
79 static struct gpio_chip template_chip = {
82 .direction_input = tps65912_gpio_input,
83 .direction_output = tps65912_gpio_output,
84 .get = tps65912_gpio_get,
85 .set = tps65912_gpio_set,
91 static int tps65912_gpio_probe(struct platform_device *pdev)
93 struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
94 struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
95 struct tps65912_gpio_data *tps65912_gpio;
98 tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
100 if (tps65912_gpio == NULL)
103 tps65912_gpio->tps65912 = tps65912;
104 tps65912_gpio->gpio_chip = template_chip;
105 tps65912_gpio->gpio_chip.parent = &pdev->dev;
106 if (pdata && pdata->gpio_base)
107 tps65912_gpio->gpio_chip.base = pdata->gpio_base;
109 ret = gpiochip_add_data(&tps65912_gpio->gpio_chip, tps65912_gpio);
111 dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
115 platform_set_drvdata(pdev, tps65912_gpio);
120 static int tps65912_gpio_remove(struct platform_device *pdev)
122 struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
124 gpiochip_remove(&tps65912_gpio->gpio_chip);
128 static struct platform_driver tps65912_gpio_driver = {
130 .name = "tps65912-gpio",
132 .probe = tps65912_gpio_probe,
133 .remove = tps65912_gpio_remove,
136 static int __init tps65912_gpio_init(void)
138 return platform_driver_register(&tps65912_gpio_driver);
140 subsys_initcall(tps65912_gpio_init);
142 static void __exit tps65912_gpio_exit(void)
144 platform_driver_unregister(&tps65912_gpio_driver);
146 module_exit(tps65912_gpio_exit);
148 MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
149 MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
150 MODULE_LICENSE("GPL v2");
151 MODULE_ALIAS("platform:tps65912-gpio");