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Commit | Line | Data |
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d5a4da15 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
2537df72 | 2 | /* |
c103de24 | 3 | * TI TPS6591x GPIO driver |
2537df72 GG |
4 | * |
5 | * Copyright 2010 Texas Instruments Inc. | |
6 | * | |
7 | * Author: Graeme Gregory <[email protected]> | |
02c7a13e | 8 | * Author: Jorge Eduardo Candelaria <[email protected]> |
2537df72 GG |
9 | */ |
10 | ||
11 | #include <linux/kernel.h> | |
02c7a13e | 12 | #include <linux/init.h> |
2537df72 | 13 | #include <linux/errno.h> |
5d75683e | 14 | #include <linux/gpio/driver.h> |
2537df72 | 15 | #include <linux/i2c.h> |
10bbc48d | 16 | #include <linux/platform_device.h> |
2537df72 | 17 | #include <linux/mfd/tps65910.h> |
6fe02e9f | 18 | #include <linux/of_device.h> |
2537df72 | 19 | |
10bbc48d LD |
20 | struct tps65910_gpio { |
21 | struct gpio_chip gpio_chip; | |
22 | struct tps65910 *tps65910; | |
23 | }; | |
24 | ||
2537df72 GG |
25 | static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) |
26 | { | |
b7c17b1b | 27 | struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
10bbc48d | 28 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
3f7e8275 | 29 | unsigned int val; |
2537df72 | 30 | |
3f7e8275 | 31 | tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val); |
2537df72 | 32 | |
11ad14f8 | 33 | if (val & GPIO_STS_MASK) |
2537df72 GG |
34 | return 1; |
35 | ||
36 | return 0; | |
37 | } | |
38 | ||
39 | static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, | |
40 | int value) | |
41 | { | |
b7c17b1b | 42 | struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
10bbc48d | 43 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
2537df72 GG |
44 | |
45 | if (value) | |
3f7e8275 | 46 | tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 47 | GPIO_SET_MASK); |
2537df72 | 48 | else |
3f7e8275 | 49 | tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 50 | GPIO_SET_MASK); |
2537df72 GG |
51 | } |
52 | ||
53 | static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, | |
54 | int value) | |
55 | { | |
b7c17b1b | 56 | struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
10bbc48d | 57 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
2537df72 GG |
58 | |
59 | /* Set the initial value */ | |
94bd2442 | 60 | tps65910_gpio_set(gc, offset, value); |
2537df72 | 61 | |
3f7e8275 | 62 | return tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 63 | GPIO_CFG_MASK); |
2537df72 GG |
64 | } |
65 | ||
66 | static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) | |
67 | { | |
b7c17b1b | 68 | struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
10bbc48d | 69 | struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
2537df72 | 70 | |
3f7e8275 | 71 | return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, |
11ad14f8 | 72 | GPIO_CFG_MASK); |
2537df72 GG |
73 | } |
74 | ||
6fe02e9f LD |
75 | #ifdef CONFIG_OF |
76 | static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, | |
77 | struct tps65910 *tps65910, int chip_ngpio) | |
78 | { | |
79 | struct tps65910_board *tps65910_board = tps65910->of_plat_data; | |
80 | unsigned int prop_array[TPS6591X_MAX_NUM_GPIO]; | |
81 | int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO); | |
82 | int ret; | |
83 | int idx; | |
84 | ||
85 | tps65910_board->gpio_base = -1; | |
86 | ret = of_property_read_u32_array(tps65910->dev->of_node, | |
87 | "ti,en-gpio-sleep", prop_array, ngpio); | |
88 | if (ret < 0) { | |
89 | dev_dbg(dev, "ti,en-gpio-sleep not specified\n"); | |
90 | return tps65910_board; | |
91 | } | |
92 | ||
93 | for (idx = 0; idx < ngpio; idx++) | |
94 | tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0); | |
95 | ||
96 | return tps65910_board; | |
97 | } | |
98 | #else | |
99 | static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, | |
100 | struct tps65910 *tps65910, int chip_ngpio) | |
101 | { | |
102 | return NULL; | |
103 | } | |
104 | #endif | |
105 | ||
3836309d | 106 | static int tps65910_gpio_probe(struct platform_device *pdev) |
2537df72 | 107 | { |
10bbc48d LD |
108 | struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); |
109 | struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); | |
110 | struct tps65910_gpio *tps65910_gpio; | |
2537df72 | 111 | int ret; |
10bbc48d LD |
112 | int i; |
113 | ||
114 | tps65910_gpio = devm_kzalloc(&pdev->dev, | |
115 | sizeof(*tps65910_gpio), GFP_KERNEL); | |
0661175a | 116 | if (!tps65910_gpio) |
10bbc48d | 117 | return -ENOMEM; |
2537df72 | 118 | |
10bbc48d | 119 | tps65910_gpio->tps65910 = tps65910; |
2537df72 | 120 | |
10bbc48d LD |
121 | tps65910_gpio->gpio_chip.owner = THIS_MODULE; |
122 | tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; | |
11ad14f8 | 123 | |
195c65e8 | 124 | switch (tps65910_chip_id(tps65910)) { |
11ad14f8 | 125 | case TPS65910: |
10bbc48d | 126 | tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; |
58956ba2 | 127 | break; |
11ad14f8 | 128 | case TPS65911: |
10bbc48d | 129 | tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; |
58956ba2 | 130 | break; |
11ad14f8 | 131 | default: |
10bbc48d | 132 | return -EINVAL; |
11ad14f8 | 133 | } |
9fb1f39e | 134 | tps65910_gpio->gpio_chip.can_sleep = true; |
10bbc48d LD |
135 | tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; |
136 | tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; | |
137 | tps65910_gpio->gpio_chip.set = tps65910_gpio_set; | |
138 | tps65910_gpio->gpio_chip.get = tps65910_gpio_get; | |
58383c78 | 139 | tps65910_gpio->gpio_chip.parent = &pdev->dev; |
bb39b655 | 140 | #ifdef CONFIG_OF_GPIO |
626f9914 | 141 | tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node; |
bb39b655 | 142 | #endif |
10bbc48d LD |
143 | if (pdata && pdata->gpio_base) |
144 | tps65910_gpio->gpio_chip.base = pdata->gpio_base; | |
145 | else | |
146 | tps65910_gpio->gpio_chip.base = -1; | |
147 | ||
6fe02e9f LD |
148 | if (!pdata && tps65910->dev->of_node) |
149 | pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910, | |
150 | tps65910_gpio->gpio_chip.ngpio); | |
151 | ||
10bbc48d LD |
152 | if (!pdata) |
153 | goto skip_init; | |
154 | ||
155 | /* Configure sleep control for gpios if provided */ | |
156 | for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { | |
157 | if (!pdata->en_gpio_sleep[i]) | |
158 | continue; | |
159 | ||
160 | ret = tps65910_reg_set_bits(tps65910, | |
161 | TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); | |
162 | if (ret < 0) | |
163 | dev_warn(tps65910->dev, | |
164 | "GPIO Sleep setting failed with err %d\n", ret); | |
165 | } | |
166 | ||
167 | skip_init: | |
bf6e855a LD |
168 | ret = devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip, |
169 | tps65910_gpio); | |
10bbc48d LD |
170 | if (ret < 0) { |
171 | dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); | |
172 | return ret; | |
9467d298 LD |
173 | } |
174 | ||
10bbc48d | 175 | platform_set_drvdata(pdev, tps65910_gpio); |
2537df72 | 176 | |
10bbc48d | 177 | return ret; |
2537df72 | 178 | } |
10bbc48d | 179 | |
10bbc48d LD |
180 | static struct platform_driver tps65910_gpio_driver = { |
181 | .driver.name = "tps65910-gpio", | |
10bbc48d | 182 | .probe = tps65910_gpio_probe, |
10bbc48d LD |
183 | }; |
184 | ||
185 | static int __init tps65910_gpio_init(void) | |
186 | { | |
187 | return platform_driver_register(&tps65910_gpio_driver); | |
188 | } | |
189 | subsys_initcall(tps65910_gpio_init); |