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Marek Vasut4cf8e532009-09-22 16:46:35 -07001/*
2 * Philips UCB1400 GPIO driver
3 *
4 * Author: Marek Vasut <marek.vasut@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/module.h>
13#include <linux/ucb1400.h>
14
Marek Vasut4cf8e532009-09-22 16:46:35 -070015static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
16{
17 struct ucb1400_gpio *gpio;
Linus Walleij9af4f0a2015-12-07 15:01:14 +010018 gpio = gpiochip_get_data(gc);
Marek Vasut4cf8e532009-09-22 16:46:35 -070019 ucb1400_gpio_set_direction(gpio->ac97, off, 0);
20 return 0;
21}
22
23static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
24{
25 struct ucb1400_gpio *gpio;
Linus Walleij9af4f0a2015-12-07 15:01:14 +010026 gpio = gpiochip_get_data(gc);
Marek Vasut4cf8e532009-09-22 16:46:35 -070027 ucb1400_gpio_set_direction(gpio->ac97, off, 1);
28 ucb1400_gpio_set_value(gpio->ac97, off, val);
29 return 0;
30}
31
32static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
33{
34 struct ucb1400_gpio *gpio;
Linus Walleij9af4f0a2015-12-07 15:01:14 +010035
36 gpio = gpiochip_get_data(gc);
Linus Walleijc9d4ab02015-12-21 14:56:04 +010037 return !!ucb1400_gpio_get_value(gpio->ac97, off);
Marek Vasut4cf8e532009-09-22 16:46:35 -070038}
39
40static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
41{
42 struct ucb1400_gpio *gpio;
Linus Walleij9af4f0a2015-12-07 15:01:14 +010043 gpio = gpiochip_get_data(gc);
Marek Vasut4cf8e532009-09-22 16:46:35 -070044 ucb1400_gpio_set_value(gpio->ac97, off, val);
45}
46
47static int ucb1400_gpio_probe(struct platform_device *dev)
48{
Jingoo Hane56aee12013-07-30 17:08:05 +090049 struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
Marek Vasut4cf8e532009-09-22 16:46:35 -070050 int err = 0;
51
Marek Vasut360e64d2013-04-14 20:35:48 +020052 if (!(ucb && ucb->gpio_offset)) {
Marek Vasut4cf8e532009-09-22 16:46:35 -070053 err = -EINVAL;
54 goto err;
55 }
56
57 platform_set_drvdata(dev, ucb);
58
59 ucb->gc.label = "ucb1400_gpio";
Marek Vasut360e64d2013-04-14 20:35:48 +020060 ucb->gc.base = ucb->gpio_offset;
Marek Vasut4cf8e532009-09-22 16:46:35 -070061 ucb->gc.ngpio = 10;
62 ucb->gc.owner = THIS_MODULE;
63
64 ucb->gc.direction_input = ucb1400_gpio_dir_in;
65 ucb->gc.direction_output = ucb1400_gpio_dir_out;
66 ucb->gc.get = ucb1400_gpio_get;
67 ucb->gc.set = ucb1400_gpio_set;
Linus Walleij9fb1f392013-12-04 14:42:46 +010068 ucb->gc.can_sleep = true;
Marek Vasut4cf8e532009-09-22 16:46:35 -070069
Laxman Dewangan5d61a9e2016-02-22 17:43:28 +053070 err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
Marek Vasut4cf8e532009-09-22 16:46:35 -070071 if (err)
72 goto err;
73
Rickard Strandqvist31a3f9d2014-06-26 18:18:51 +020074 if (ucb->gpio_setup)
Marek Vasut360e64d2013-04-14 20:35:48 +020075 err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
Marek Vasut4cf8e532009-09-22 16:46:35 -070076
77err:
78 return err;
79
80}
81
82static int ucb1400_gpio_remove(struct platform_device *dev)
83{
84 int err = 0;
85 struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
86
Marek Vasut360e64d2013-04-14 20:35:48 +020087 if (ucb && ucb->gpio_teardown) {
88 err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
Marek Vasut4cf8e532009-09-22 16:46:35 -070089 if (err)
90 return err;
91 }
92
Marek Vasut4cf8e532009-09-22 16:46:35 -070093 return err;
94}
95
96static struct platform_driver ucb1400_gpio_driver = {
97 .probe = ucb1400_gpio_probe,
98 .remove = ucb1400_gpio_remove,
99 .driver = {
100 .name = "ucb1400_gpio"
101 },
102};
103
Mark Brown6f614152011-12-08 00:24:00 +0800104module_platform_driver(ucb1400_gpio_driver);
Marek Vasut4cf8e532009-09-22 16:46:35 -0700105
106MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
107MODULE_LICENSE("GPL");
Axel Lin41ad7302013-11-19 15:31:20 +0800108MODULE_ALIAS("platform:ucb1400_gpio");