tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Philips UCB1400 GPIO driver
4 *
5 * Author: Marek Vasut <marek.vasut@gmail.com>
6 */
7
8#include <linux/module.h>
9#include <linux/ucb1400.h>
10
11static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
12{
13 struct ucb1400_gpio *gpio;
14 gpio = gpiochip_get_data(gc);
15 ucb1400_gpio_set_direction(gpio->ac97, off, 0);
16 return 0;
17}
18
19static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
20{
21 struct ucb1400_gpio *gpio;
22 gpio = gpiochip_get_data(gc);
23 ucb1400_gpio_set_direction(gpio->ac97, off, 1);
24 ucb1400_gpio_set_value(gpio->ac97, off, val);
25 return 0;
26}
27
28static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
29{
30 struct ucb1400_gpio *gpio;
31
32 gpio = gpiochip_get_data(gc);
33 return !!ucb1400_gpio_get_value(gpio->ac97, off);
34}
35
36static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
37{
38 struct ucb1400_gpio *gpio;
39 gpio = gpiochip_get_data(gc);
40 ucb1400_gpio_set_value(gpio->ac97, off, val);
41}
42
43static int ucb1400_gpio_probe(struct platform_device *dev)
44{
45 struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
46 int err = 0;
47
48 if (!(ucb && ucb->gpio_offset)) {
49 err = -EINVAL;
50 goto err;
51 }
52
53 platform_set_drvdata(dev, ucb);
54
55 ucb->gc.label = "ucb1400_gpio";
56 ucb->gc.base = ucb->gpio_offset;
57 ucb->gc.ngpio = 10;
58 ucb->gc.owner = THIS_MODULE;
59
60 ucb->gc.direction_input = ucb1400_gpio_dir_in;
61 ucb->gc.direction_output = ucb1400_gpio_dir_out;
62 ucb->gc.get = ucb1400_gpio_get;
63 ucb->gc.set = ucb1400_gpio_set;
64 ucb->gc.can_sleep = true;
65
66 err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
67
68err:
69 return err;
70
71}
72
73static struct platform_driver ucb1400_gpio_driver = {
74 .probe = ucb1400_gpio_probe,
75 .driver = {
76 .name = "ucb1400_gpio"
77 },
78};
79
80module_platform_driver(ucb1400_gpio_driver);
81
82MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
83MODULE_LICENSE("GPL");
84MODULE_ALIAS("platform:ucb1400_gpio");