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Graeme Gregory2537df72011-05-02 16:19:52 -05001/*
Grant Likelyc103de22011-06-04 18:38:28 -06002 * TI TPS6591x GPIO driver
Graeme Gregory2537df72011-05-02 16:19:52 -05003 *
4 * Copyright 2010 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/errno.h>
19#include <linux/gpio.h>
20#include <linux/i2c.h>
Laxman Dewangan10bbc482012-05-11 21:48:27 +053021#include <linux/platform_device.h>
Graeme Gregory2537df72011-05-02 16:19:52 -050022#include <linux/mfd/tps65910.h>
Laxman Dewangan6fe02e92012-05-19 02:01:43 +053023#include <linux/of_device.h>
Graeme Gregory2537df72011-05-02 16:19:52 -050024
Laxman Dewangan10bbc482012-05-11 21:48:27 +053025struct tps65910_gpio {
26 struct gpio_chip gpio_chip;
27 struct tps65910 *tps65910;
28};
29
30static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip)
31{
32 return container_of(chip, struct tps65910_gpio, gpio_chip);
33}
34
Graeme Gregory2537df72011-05-02 16:19:52 -050035static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
36{
Laxman Dewangan10bbc482012-05-11 21:48:27 +053037 struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
38 struct tps65910 *tps65910 = tps65910_gpio->tps65910;
Rhyland Klein3f7e8272012-05-08 11:42:38 -070039 unsigned int val;
Graeme Gregory2537df72011-05-02 16:19:52 -050040
Rhyland Klein3f7e8272012-05-08 11:42:38 -070041 tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val);
Graeme Gregory2537df72011-05-02 16:19:52 -050042
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -050043 if (val & GPIO_STS_MASK)
Graeme Gregory2537df72011-05-02 16:19:52 -050044 return 1;
45
46 return 0;
47}
48
49static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
50 int value)
51{
Laxman Dewangan10bbc482012-05-11 21:48:27 +053052 struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
53 struct tps65910 *tps65910 = tps65910_gpio->tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -050054
55 if (value)
Rhyland Klein3f7e8272012-05-08 11:42:38 -070056 tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset,
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -050057 GPIO_SET_MASK);
Graeme Gregory2537df72011-05-02 16:19:52 -050058 else
Rhyland Klein3f7e8272012-05-08 11:42:38 -070059 tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset,
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -050060 GPIO_SET_MASK);
Graeme Gregory2537df72011-05-02 16:19:52 -050061}
62
63static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
64 int value)
65{
Laxman Dewangan10bbc482012-05-11 21:48:27 +053066 struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
67 struct tps65910 *tps65910 = tps65910_gpio->tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -050068
69 /* Set the initial value */
Laxman Dewangan94bd2442012-01-18 20:07:35 +053070 tps65910_gpio_set(gc, offset, value);
Graeme Gregory2537df72011-05-02 16:19:52 -050071
Rhyland Klein3f7e8272012-05-08 11:42:38 -070072 return tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset,
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -050073 GPIO_CFG_MASK);
Graeme Gregory2537df72011-05-02 16:19:52 -050074}
75
76static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
77{
Laxman Dewangan10bbc482012-05-11 21:48:27 +053078 struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
79 struct tps65910 *tps65910 = tps65910_gpio->tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -050080
Rhyland Klein3f7e8272012-05-08 11:42:38 -070081 return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset,
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -050082 GPIO_CFG_MASK);
Graeme Gregory2537df72011-05-02 16:19:52 -050083}
84
Laxman Dewangan6fe02e92012-05-19 02:01:43 +053085#ifdef CONFIG_OF
86static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
87 struct tps65910 *tps65910, int chip_ngpio)
88{
89 struct tps65910_board *tps65910_board = tps65910->of_plat_data;
90 unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];
91 int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO);
92 int ret;
93 int idx;
94
95 tps65910_board->gpio_base = -1;
96 ret = of_property_read_u32_array(tps65910->dev->of_node,
97 "ti,en-gpio-sleep", prop_array, ngpio);
98 if (ret < 0) {
99 dev_dbg(dev, "ti,en-gpio-sleep not specified\n");
100 return tps65910_board;
101 }
102
103 for (idx = 0; idx < ngpio; idx++)
104 tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0);
105
106 return tps65910_board;
107}
108#else
109static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
110 struct tps65910 *tps65910, int chip_ngpio)
111{
112 return NULL;
113}
114#endif
115
Bill Pemberton38363092012-11-19 13:22:34 -0500116static int tps65910_gpio_probe(struct platform_device *pdev)
Graeme Gregory2537df72011-05-02 16:19:52 -0500117{
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530118 struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
119 struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);
120 struct tps65910_gpio *tps65910_gpio;
Graeme Gregory2537df72011-05-02 16:19:52 -0500121 int ret;
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530122 int i;
Graeme Gregory2537df72011-05-02 16:19:52 -0500123
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530124 tps65910_gpio = devm_kzalloc(&pdev->dev,
125 sizeof(*tps65910_gpio), GFP_KERNEL);
Jingoo Han06611752014-04-29 17:45:46 +0900126 if (!tps65910_gpio)
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530127 return -ENOMEM;
Graeme Gregory2537df72011-05-02 16:19:52 -0500128
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530129 tps65910_gpio->tps65910 = tps65910;
130
131 tps65910_gpio->gpio_chip.owner = THIS_MODULE;
132 tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -0500133
Laurent Navet195c65e2013-03-20 13:16:04 +0100134 switch (tps65910_chip_id(tps65910)) {
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -0500135 case TPS65910:
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530136 tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
Axel Lin58956ba2011-07-06 10:08:27 +0800137 break;
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -0500138 case TPS65911:
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530139 tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;
Axel Lin58956ba2011-07-06 10:08:27 +0800140 break;
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -0500141 default:
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530142 return -EINVAL;
Jorge Eduardo Candelaria11ad14f2011-05-16 18:35:42 -0500143 }
Linus Walleij9fb1f392013-12-04 14:42:46 +0100144 tps65910_gpio->gpio_chip.can_sleep = true;
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530145 tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;
146 tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;
147 tps65910_gpio->gpio_chip.set = tps65910_gpio_set;
148 tps65910_gpio->gpio_chip.get = tps65910_gpio_get;
149 tps65910_gpio->gpio_chip.dev = &pdev->dev;
Jerry Snitselaarbb39b652012-07-09 22:16:34 -0700150#ifdef CONFIG_OF_GPIO
Laxman Dewangan626f9912012-07-04 20:36:45 +0530151 tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node;
Jerry Snitselaarbb39b652012-07-09 22:16:34 -0700152#endif
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530153 if (pdata && pdata->gpio_base)
154 tps65910_gpio->gpio_chip.base = pdata->gpio_base;
155 else
156 tps65910_gpio->gpio_chip.base = -1;
Graeme Gregory2537df72011-05-02 16:19:52 -0500157
Laxman Dewangan6fe02e92012-05-19 02:01:43 +0530158 if (!pdata && tps65910->dev->of_node)
159 pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910,
160 tps65910_gpio->gpio_chip.ngpio);
161
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530162 if (!pdata)
163 goto skip_init;
Graeme Gregory2537df72011-05-02 16:19:52 -0500164
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530165 /* Configure sleep control for gpios if provided */
166 for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {
167 if (!pdata->en_gpio_sleep[i])
168 continue;
169
170 ret = tps65910_reg_set_bits(tps65910,
171 TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
172 if (ret < 0)
173 dev_warn(tps65910->dev,
174 "GPIO Sleep setting failed with err %d\n", ret);
Laxman Dewangan9467d292012-02-01 12:09:04 +0530175 }
176
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530177skip_init:
178 ret = gpiochip_add(&tps65910_gpio->gpio_chip);
179 if (ret < 0) {
180 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
181 return ret;
182 }
Graeme Gregory2537df72011-05-02 16:19:52 -0500183
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530184 platform_set_drvdata(pdev, tps65910_gpio);
185
186 return ret;
Graeme Gregory2537df72011-05-02 16:19:52 -0500187}
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530188
Bill Pemberton206210c2012-11-19 13:25:50 -0500189static int tps65910_gpio_remove(struct platform_device *pdev)
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530190{
191 struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev);
192
abdoulaye berthe9f5132a2014-07-12 22:30:12 +0200193 gpiochip_remove(&tps65910_gpio->gpio_chip);
194 return 0;
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530195}
196
197static struct platform_driver tps65910_gpio_driver = {
198 .driver.name = "tps65910-gpio",
199 .driver.owner = THIS_MODULE,
200 .probe = tps65910_gpio_probe,
Bill Pemberton8283c4f2012-11-19 13:20:08 -0500201 .remove = tps65910_gpio_remove,
Laxman Dewangan10bbc482012-05-11 21:48:27 +0530202};
203
204static int __init tps65910_gpio_init(void)
205{
206 return platform_driver_register(&tps65910_gpio_driver);
207}
208subsys_initcall(tps65910_gpio_init);
209
210static void __exit tps65910_gpio_exit(void)
211{
212 platform_driver_unregister(&tps65910_gpio_driver);
213}
214module_exit(tps65910_gpio_exit);
215
216MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
217MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>");
218MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs");
219MODULE_LICENSE("GPL v2");
220MODULE_ALIAS("platform:tps65910-gpio");