r8152: fix tx packets accounting
[linux/fpc-iii.git] / drivers / gpio / gpio-tps65912.c
blobabc0798ef843a485a88b4a520cb529e1b6b99780
1 /*
2 * GPIO driver for TI TPS65912x PMICs
4 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
5 * Andrew F. Davis <afd@ti.com>
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.
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.
16 * Based on the Arizona GPIO driver and the previous TPS65912 driver by
17 * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
20 #include <linux/gpio.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
24 #include <linux/mfd/tps65912.h>
26 struct tps65912_gpio {
27 struct gpio_chip gpio_chip;
28 struct tps65912 *tps;
31 static int tps65912_gpio_get_direction(struct gpio_chip *gc,
32 unsigned offset)
34 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
36 int ret, val;
38 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
39 if (ret)
40 return ret;
42 if (val & GPIO_CFG_MASK)
43 return GPIOF_DIR_OUT;
44 else
45 return GPIOF_DIR_IN;
48 static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
50 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
52 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
53 GPIO_CFG_MASK, 0);
56 static int tps65912_gpio_direction_output(struct gpio_chip *gc,
57 unsigned offset, int value)
59 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
61 /* Set the initial value */
62 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
63 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
65 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
66 GPIO_CFG_MASK, GPIO_CFG_MASK);
69 static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
71 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
72 int ret, val;
74 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
75 if (ret)
76 return ret;
78 if (val & GPIO_STS_MASK)
79 return 1;
81 return 0;
84 static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
85 int value)
87 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
89 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
90 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
93 static const struct gpio_chip template_chip = {
94 .label = "tps65912-gpio",
95 .owner = THIS_MODULE,
96 .get_direction = tps65912_gpio_get_direction,
97 .direction_input = tps65912_gpio_direction_input,
98 .direction_output = tps65912_gpio_direction_output,
99 .get = tps65912_gpio_get,
100 .set = tps65912_gpio_set,
101 .base = -1,
102 .ngpio = 5,
103 .can_sleep = true,
106 static int tps65912_gpio_probe(struct platform_device *pdev)
108 struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
109 struct tps65912_gpio *gpio;
110 int ret;
112 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
113 if (!gpio)
114 return -ENOMEM;
116 gpio->tps = dev_get_drvdata(pdev->dev.parent);
117 gpio->gpio_chip = template_chip;
118 gpio->gpio_chip.parent = tps->dev;
120 ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip,
121 gpio);
122 if (ret < 0) {
123 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
124 return ret;
127 platform_set_drvdata(pdev, gpio);
129 return 0;
132 static const struct platform_device_id tps65912_gpio_id_table[] = {
133 { "tps65912-gpio", },
134 { /* sentinel */ }
136 MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
138 static struct platform_driver tps65912_gpio_driver = {
139 .driver = {
140 .name = "tps65912-gpio",
142 .probe = tps65912_gpio_probe,
143 .id_table = tps65912_gpio_id_table,
145 module_platform_driver(tps65912_gpio_driver);
147 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
148 MODULE_DESCRIPTION("TPS65912 GPIO driver");
149 MODULE_LICENSE("GPL v2");