Commit | Line | Data |
---|---|---|
668a6cc7 | 1 | /* |
ca801a22 | 2 | * GPIO driver for TI TPS65912x PMICs |
668a6cc7 | 3 | * |
ca801a22 AD |
4 | * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ |
5 | * Andrew F. Davis <afd@ti.com> | |
668a6cc7 | 6 | * |
ca801a22 AD |
7 | * This program is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
668a6cc7 | 10 | * |
ca801a22 AD |
11 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
12 | * kind, whether expressed or implied; without even the implied warranty | |
13 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License version 2 for more details. | |
15 | * | |
16 | * Based on the Arizona GPIO driver and the previous TPS65912 driver by | |
17 | * Margarita Olaya Cabrera <magi@slimlogic.co.uk> | |
668a6cc7 MO |
18 | */ |
19 | ||
668a6cc7 | 20 | #include <linux/gpio.h> |
ca801a22 | 21 | #include <linux/module.h> |
668a6cc7 | 22 | #include <linux/platform_device.h> |
ca801a22 | 23 | |
668a6cc7 MO |
24 | #include <linux/mfd/tps65912.h> |
25 | ||
ca801a22 | 26 | struct tps65912_gpio { |
668a6cc7 | 27 | struct gpio_chip gpio_chip; |
ca801a22 | 28 | struct tps65912 *tps; |
668a6cc7 MO |
29 | }; |
30 | ||
ca801a22 AD |
31 | static int tps65912_gpio_get_direction(struct gpio_chip *gc, |
32 | unsigned offset) | |
668a6cc7 | 33 | { |
ca801a22 | 34 | struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
668a6cc7 | 35 | |
ca801a22 | 36 | int ret, val; |
668a6cc7 | 37 | |
ca801a22 AD |
38 | ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); |
39 | if (ret) | |
40 | return ret; | |
668a6cc7 | 41 | |
ca801a22 AD |
42 | if (val & GPIO_CFG_MASK) |
43 | return GPIOF_DIR_OUT; | |
44 | else | |
45 | return GPIOF_DIR_IN; | |
668a6cc7 MO |
46 | } |
47 | ||
ca801a22 | 48 | static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset) |
668a6cc7 | 49 | { |
ca801a22 | 50 | struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
668a6cc7 | 51 | |
ca801a22 AD |
52 | return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
53 | GPIO_CFG_MASK, 0); | |
668a6cc7 MO |
54 | } |
55 | ||
ca801a22 AD |
56 | static int tps65912_gpio_direction_output(struct gpio_chip *gc, |
57 | unsigned offset, int value) | |
668a6cc7 | 58 | { |
ca801a22 | 59 | struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
668a6cc7 MO |
60 | |
61 | /* Set the initial value */ | |
ca801a22 AD |
62 | regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
63 | GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); | |
668a6cc7 | 64 | |
ca801a22 AD |
65 | return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
66 | GPIO_CFG_MASK, GPIO_CFG_MASK); | |
668a6cc7 MO |
67 | } |
68 | ||
ca801a22 | 69 | static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset) |
668a6cc7 | 70 | { |
ca801a22 AD |
71 | struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
72 | int ret, val; | |
73 | ||
74 | ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); | |
75 | if (ret) | |
76 | return ret; | |
668a6cc7 | 77 | |
ca801a22 AD |
78 | if (val & GPIO_STS_MASK) |
79 | return 1; | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset, | |
85 | int value) | |
86 | { | |
87 | struct tps65912_gpio *gpio = gpiochip_get_data(gc); | |
88 | ||
89 | regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, | |
90 | GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); | |
668a6cc7 MO |
91 | } |
92 | ||
93 | static struct gpio_chip template_chip = { | |
ca801a22 | 94 | .label = "tps65912-gpio", |
668a6cc7 | 95 | .owner = THIS_MODULE, |
ca801a22 AD |
96 | .get_direction = tps65912_gpio_get_direction, |
97 | .direction_input = tps65912_gpio_direction_input, | |
98 | .direction_output = tps65912_gpio_direction_output, | |
668a6cc7 MO |
99 | .get = tps65912_gpio_get, |
100 | .set = tps65912_gpio_set, | |
668a6cc7 | 101 | .base = -1, |
ca801a22 AD |
102 | .ngpio = 5, |
103 | .can_sleep = true, | |
668a6cc7 MO |
104 | }; |
105 | ||
3836309d | 106 | static int tps65912_gpio_probe(struct platform_device *pdev) |
668a6cc7 | 107 | { |
ca801a22 AD |
108 | struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent); |
109 | struct tps65912_gpio *gpio; | |
668a6cc7 MO |
110 | int ret; |
111 | ||
ca801a22 AD |
112 | gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); |
113 | if (!gpio) | |
668a6cc7 MO |
114 | return -ENOMEM; |
115 | ||
ca801a22 AD |
116 | gpio->tps = dev_get_drvdata(pdev->dev.parent); |
117 | gpio->gpio_chip = template_chip; | |
118 | gpio->gpio_chip.parent = tps->dev; | |
668a6cc7 | 119 | |
9d93efe3 LW |
120 | ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, |
121 | gpio); | |
668a6cc7 | 122 | if (ret < 0) { |
ca801a22 | 123 | dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); |
45e253a7 | 124 | return ret; |
668a6cc7 MO |
125 | } |
126 | ||
ca801a22 | 127 | platform_set_drvdata(pdev, gpio); |
668a6cc7 | 128 | |
ca801a22 | 129 | return 0; |
668a6cc7 MO |
130 | } |
131 | ||
ca801a22 AD |
132 | static const struct platform_device_id tps65912_gpio_id_table[] = { |
133 | { "tps65912-gpio", }, | |
134 | { /* sentinel */ } | |
135 | }; | |
136 | MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table); | |
137 | ||
668a6cc7 MO |
138 | static struct platform_driver tps65912_gpio_driver = { |
139 | .driver = { | |
140 | .name = "tps65912-gpio", | |
668a6cc7 MO |
141 | }, |
142 | .probe = tps65912_gpio_probe, | |
ca801a22 | 143 | .id_table = tps65912_gpio_id_table, |
668a6cc7 | 144 | }; |
ca801a22 | 145 | module_platform_driver(tps65912_gpio_driver); |
668a6cc7 | 146 | |
ca801a22 AD |
147 | MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); |
148 | MODULE_DESCRIPTION("TPS65912 GPIO driver"); | |
668a6cc7 | 149 | MODULE_LICENSE("GPL v2"); |