Commit | Line | Data |
---|---|---|
2537df72 | 1 | /* |
c103de24 | 2 | * TI TPS6591x GPIO driver |
2537df72 GG |
3 | * |
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> | |
10bbc48d | 21 | #include <linux/platform_device.h> |
2537df72 | 22 | #include <linux/mfd/tps65910.h> |
6fe02e9f | 23 | #include <linux/of_device.h> |
2537df72 | 24 | |
10bbc48d LD |
25 | struct tps65910_gpio { |
26 | struct gpio_chip gpio_chip; | |
27 | struct tps65910 *tps65910; | |
28 | }; | |
29 | ||
30 | static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip) | |
31 | { | |
32 | return container_of(chip, struct tps65910_gpio, gpio_chip); | |
33 | } | |
34 | ||
2537df72 GG |
35 | static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) |
36 | { | |
10bbc48d LD |
37 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
38 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
3f7e8275 | 39 | unsigned int val; |
2537df72 | 40 | |
3f7e8275 | 41 | tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val); |
2537df72 | 42 | |
11ad14f8 | 43 | if (val & GPIO_STS_MASK) |
2537df72 GG |
44 | return 1; |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, | |
50 | int value) | |
51 | { | |
10bbc48d LD |
52 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
53 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 GG |
54 | |
55 | if (value) | |
3f7e8275 | 56 | tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 57 | GPIO_SET_MASK); |
2537df72 | 58 | else |
3f7e8275 | 59 | tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 60 | GPIO_SET_MASK); |
2537df72 GG |
61 | } |
62 | ||
63 | static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, | |
64 | int value) | |
65 | { | |
10bbc48d LD |
66 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
67 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 GG |
68 | |
69 | /* Set the initial value */ | |
94bd2442 | 70 | tps65910_gpio_set(gc, offset, value); |
2537df72 | 71 | |
3f7e8275 | 72 | return tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 73 | GPIO_CFG_MASK); |
2537df72 GG |
74 | } |
75 | ||
76 | static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) | |
77 | { | |
10bbc48d LD |
78 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
79 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 | 80 | |
3f7e8275 | 81 | return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 82 | GPIO_CFG_MASK); |
2537df72 GG |
83 | } |
84 | ||
6fe02e9f LD |
85 | #ifdef CONFIG_OF |
86 | static 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 | |
109 | static 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 | ||
10bbc48d | 116 | static int __devinit tps65910_gpio_probe(struct platform_device *pdev) |
2537df72 | 117 | { |
10bbc48d LD |
118 | 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; | |
2537df72 | 121 | int ret; |
10bbc48d LD |
122 | int i; |
123 | ||
124 | tps65910_gpio = devm_kzalloc(&pdev->dev, | |
125 | sizeof(*tps65910_gpio), GFP_KERNEL); | |
126 | if (!tps65910_gpio) { | |
127 | dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n"); | |
128 | return -ENOMEM; | |
129 | } | |
2537df72 | 130 | |
10bbc48d | 131 | tps65910_gpio->tps65910 = tps65910; |
2537df72 | 132 | |
10bbc48d LD |
133 | tps65910_gpio->gpio_chip.owner = THIS_MODULE; |
134 | tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; | |
11ad14f8 JEC |
135 | |
136 | switch(tps65910_chip_id(tps65910)) { | |
137 | case TPS65910: | |
10bbc48d | 138 | tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; |
58956ba2 | 139 | break; |
11ad14f8 | 140 | case TPS65911: |
10bbc48d | 141 | tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; |
58956ba2 | 142 | break; |
11ad14f8 | 143 | default: |
10bbc48d | 144 | return -EINVAL; |
11ad14f8 | 145 | } |
10bbc48d LD |
146 | tps65910_gpio->gpio_chip.can_sleep = 1; |
147 | tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; | |
148 | tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; | |
149 | tps65910_gpio->gpio_chip.set = tps65910_gpio_set; | |
150 | tps65910_gpio->gpio_chip.get = tps65910_gpio_get; | |
151 | tps65910_gpio->gpio_chip.dev = &pdev->dev; | |
152 | if (pdata && pdata->gpio_base) | |
153 | tps65910_gpio->gpio_chip.base = pdata->gpio_base; | |
154 | else | |
155 | tps65910_gpio->gpio_chip.base = -1; | |
156 | ||
6fe02e9f LD |
157 | if (!pdata && tps65910->dev->of_node) |
158 | pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910, | |
159 | tps65910_gpio->gpio_chip.ngpio); | |
160 | ||
10bbc48d LD |
161 | if (!pdata) |
162 | goto skip_init; | |
163 | ||
164 | /* Configure sleep control for gpios if provided */ | |
165 | for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { | |
166 | if (!pdata->en_gpio_sleep[i]) | |
167 | continue; | |
168 | ||
169 | ret = tps65910_reg_set_bits(tps65910, | |
170 | TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); | |
171 | if (ret < 0) | |
172 | dev_warn(tps65910->dev, | |
173 | "GPIO Sleep setting failed with err %d\n", ret); | |
174 | } | |
175 | ||
176 | skip_init: | |
177 | ret = gpiochip_add(&tps65910_gpio->gpio_chip); | |
178 | if (ret < 0) { | |
179 | dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); | |
180 | return ret; | |
9467d298 LD |
181 | } |
182 | ||
10bbc48d | 183 | platform_set_drvdata(pdev, tps65910_gpio); |
2537df72 | 184 | |
10bbc48d | 185 | return ret; |
2537df72 | 186 | } |
10bbc48d LD |
187 | |
188 | static int __devexit tps65910_gpio_remove(struct platform_device *pdev) | |
189 | { | |
190 | struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev); | |
191 | ||
192 | return gpiochip_remove(&tps65910_gpio->gpio_chip); | |
193 | } | |
194 | ||
195 | static struct platform_driver tps65910_gpio_driver = { | |
196 | .driver.name = "tps65910-gpio", | |
197 | .driver.owner = THIS_MODULE, | |
198 | .probe = tps65910_gpio_probe, | |
199 | .remove = __devexit_p(tps65910_gpio_remove), | |
200 | }; | |
201 | ||
202 | static int __init tps65910_gpio_init(void) | |
203 | { | |
204 | return platform_driver_register(&tps65910_gpio_driver); | |
205 | } | |
206 | subsys_initcall(tps65910_gpio_init); | |
207 | ||
208 | static void __exit tps65910_gpio_exit(void) | |
209 | { | |
210 | platform_driver_unregister(&tps65910_gpio_driver); | |
211 | } | |
212 | module_exit(tps65910_gpio_exit); | |
213 | ||
214 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
215 | MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>"); | |
216 | MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs"); | |
217 | MODULE_LICENSE("GPL v2"); | |
218 | MODULE_ALIAS("platform:tps65910-gpio"); |