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Commit | Line | Data |
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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 GG |
22 | #include <linux/mfd/tps65910.h> |
23 | ||
10bbc48d LD |
24 | struct tps65910_gpio { |
25 | struct gpio_chip gpio_chip; | |
26 | struct tps65910 *tps65910; | |
27 | }; | |
28 | ||
29 | static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip) | |
30 | { | |
31 | return container_of(chip, struct tps65910_gpio, gpio_chip); | |
32 | } | |
33 | ||
2537df72 GG |
34 | static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) |
35 | { | |
10bbc48d LD |
36 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
37 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
3f7e8275 | 38 | unsigned int val; |
2537df72 | 39 | |
3f7e8275 | 40 | tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val); |
2537df72 | 41 | |
11ad14f8 | 42 | if (val & GPIO_STS_MASK) |
2537df72 GG |
43 | return 1; |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, | |
49 | int value) | |
50 | { | |
10bbc48d LD |
51 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
52 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 GG |
53 | |
54 | if (value) | |
3f7e8275 | 55 | tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 56 | GPIO_SET_MASK); |
2537df72 | 57 | else |
3f7e8275 | 58 | tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 59 | GPIO_SET_MASK); |
2537df72 GG |
60 | } |
61 | ||
62 | static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, | |
63 | int value) | |
64 | { | |
10bbc48d LD |
65 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
66 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 GG |
67 | |
68 | /* Set the initial value */ | |
94bd2442 | 69 | tps65910_gpio_set(gc, offset, value); |
2537df72 | 70 | |
3f7e8275 | 71 | return tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 72 | GPIO_CFG_MASK); |
2537df72 GG |
73 | } |
74 | ||
75 | static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) | |
76 | { | |
10bbc48d LD |
77 | struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); |
78 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; | |
2537df72 | 79 | |
3f7e8275 | 80 | return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 81 | GPIO_CFG_MASK); |
2537df72 GG |
82 | } |
83 | ||
10bbc48d | 84 | static int __devinit tps65910_gpio_probe(struct platform_device *pdev) |
2537df72 | 85 | { |
10bbc48d LD |
86 | struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); |
87 | struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); | |
88 | struct tps65910_gpio *tps65910_gpio; | |
2537df72 | 89 | int ret; |
10bbc48d LD |
90 | int i; |
91 | ||
92 | tps65910_gpio = devm_kzalloc(&pdev->dev, | |
93 | sizeof(*tps65910_gpio), GFP_KERNEL); | |
94 | if (!tps65910_gpio) { | |
95 | dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n"); | |
96 | return -ENOMEM; | |
97 | } | |
2537df72 | 98 | |
10bbc48d | 99 | tps65910_gpio->tps65910 = tps65910; |
2537df72 | 100 | |
10bbc48d LD |
101 | tps65910_gpio->gpio_chip.owner = THIS_MODULE; |
102 | tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; | |
11ad14f8 JEC |
103 | |
104 | switch(tps65910_chip_id(tps65910)) { | |
105 | case TPS65910: | |
10bbc48d | 106 | tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; |
58956ba2 | 107 | break; |
11ad14f8 | 108 | case TPS65911: |
10bbc48d | 109 | tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; |
58956ba2 | 110 | break; |
11ad14f8 | 111 | default: |
10bbc48d | 112 | return -EINVAL; |
11ad14f8 | 113 | } |
10bbc48d LD |
114 | tps65910_gpio->gpio_chip.can_sleep = 1; |
115 | tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; | |
116 | tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; | |
117 | tps65910_gpio->gpio_chip.set = tps65910_gpio_set; | |
118 | tps65910_gpio->gpio_chip.get = tps65910_gpio_get; | |
119 | tps65910_gpio->gpio_chip.dev = &pdev->dev; | |
120 | if (pdata && pdata->gpio_base) | |
121 | tps65910_gpio->gpio_chip.base = pdata->gpio_base; | |
122 | else | |
123 | tps65910_gpio->gpio_chip.base = -1; | |
124 | ||
125 | if (!pdata) | |
126 | goto skip_init; | |
127 | ||
128 | /* Configure sleep control for gpios if provided */ | |
129 | for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { | |
130 | if (!pdata->en_gpio_sleep[i]) | |
131 | continue; | |
132 | ||
133 | ret = tps65910_reg_set_bits(tps65910, | |
134 | TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); | |
135 | if (ret < 0) | |
136 | dev_warn(tps65910->dev, | |
137 | "GPIO Sleep setting failed with err %d\n", ret); | |
138 | } | |
139 | ||
140 | skip_init: | |
141 | ret = gpiochip_add(&tps65910_gpio->gpio_chip); | |
142 | if (ret < 0) { | |
143 | dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); | |
144 | return ret; | |
9467d298 LD |
145 | } |
146 | ||
10bbc48d | 147 | platform_set_drvdata(pdev, tps65910_gpio); |
2537df72 | 148 | |
10bbc48d | 149 | return ret; |
2537df72 | 150 | } |
10bbc48d LD |
151 | |
152 | static int __devexit tps65910_gpio_remove(struct platform_device *pdev) | |
153 | { | |
154 | struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev); | |
155 | ||
156 | return gpiochip_remove(&tps65910_gpio->gpio_chip); | |
157 | } | |
158 | ||
159 | static struct platform_driver tps65910_gpio_driver = { | |
160 | .driver.name = "tps65910-gpio", | |
161 | .driver.owner = THIS_MODULE, | |
162 | .probe = tps65910_gpio_probe, | |
163 | .remove = __devexit_p(tps65910_gpio_remove), | |
164 | }; | |
165 | ||
166 | static int __init tps65910_gpio_init(void) | |
167 | { | |
168 | return platform_driver_register(&tps65910_gpio_driver); | |
169 | } | |
170 | subsys_initcall(tps65910_gpio_init); | |
171 | ||
172 | static void __exit tps65910_gpio_exit(void) | |
173 | { | |
174 | platform_driver_unregister(&tps65910_gpio_driver); | |
175 | } | |
176 | module_exit(tps65910_gpio_exit); | |
177 | ||
178 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
179 | MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>"); | |
180 | MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs"); | |
181 | MODULE_LICENSE("GPL v2"); | |
182 | MODULE_ALIAS("platform:tps65910-gpio"); |