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#include <linux/gpio/driver.h>
 
11
12static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
13{
14	struct ucb1400_gpio *gpio;
15	gpio = gpiochip_get_data(gc);
16	ucb1400_gpio_set_direction(gpio->ac97, off, 0);
17	return 0;
18}
19
20static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
21{
22	struct ucb1400_gpio *gpio;
23	gpio = gpiochip_get_data(gc);
24	ucb1400_gpio_set_direction(gpio->ac97, off, 1);
25	ucb1400_gpio_set_value(gpio->ac97, off, val);
26	return 0;
27}
28
29static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
30{
31	struct ucb1400_gpio *gpio;
32
33	gpio = gpiochip_get_data(gc);
34	return !!ucb1400_gpio_get_value(gpio->ac97, off);
35}
36
37static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
38{
39	struct ucb1400_gpio *gpio;
40	gpio = gpiochip_get_data(gc);
41	ucb1400_gpio_set_value(gpio->ac97, off, val);
42}
43
44static int ucb1400_gpio_probe(struct platform_device *dev)
45{
46	struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
47	int err = 0;
48
49	if (!(ucb && ucb->gpio_offset)) {
50		err = -EINVAL;
51		goto err;
52	}
53
54	platform_set_drvdata(dev, ucb);
55
56	ucb->gc.label = "ucb1400_gpio";
57	ucb->gc.base = ucb->gpio_offset;
58	ucb->gc.ngpio = 10;
59	ucb->gc.owner = THIS_MODULE;
60
61	ucb->gc.direction_input = ucb1400_gpio_dir_in;
62	ucb->gc.direction_output = ucb1400_gpio_dir_out;
63	ucb->gc.get = ucb1400_gpio_get;
64	ucb->gc.set = ucb1400_gpio_set;
65	ucb->gc.can_sleep = true;
 
 
 
 
66
67	err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
 
68
69err:
70	return err;
71
72}
73
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
74static struct platform_driver ucb1400_gpio_driver = {
75	.probe	= ucb1400_gpio_probe,
 
76	.driver	= {
77		.name	= "ucb1400_gpio"
78	},
79};
80
81module_platform_driver(ucb1400_gpio_driver);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
82
83MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
84MODULE_LICENSE("GPL");
85MODULE_ALIAS("platform:ucb1400_gpio");

 
  1/*
  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
 15struct ucb1400_gpio_data *ucbdata;
 16
 17static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
 18{
 19	struct ucb1400_gpio *gpio;
 20	gpio = container_of(gc, struct ucb1400_gpio, gc);
 21	ucb1400_gpio_set_direction(gpio->ac97, off, 0);
 22	return 0;
 23}
 24
 25static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
 26{
 27	struct ucb1400_gpio *gpio;
 28	gpio = container_of(gc, struct ucb1400_gpio, gc);
 29	ucb1400_gpio_set_direction(gpio->ac97, off, 1);
 30	ucb1400_gpio_set_value(gpio->ac97, off, val);
 31	return 0;
 32}
 33
 34static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
 35{
 36	struct ucb1400_gpio *gpio;
 37	gpio = container_of(gc, struct ucb1400_gpio, gc);
 38	return ucb1400_gpio_get_value(gpio->ac97, off);
 
 39}
 40
 41static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
 42{
 43	struct ucb1400_gpio *gpio;
 44	gpio = container_of(gc, struct ucb1400_gpio, gc);
 45	ucb1400_gpio_set_value(gpio->ac97, off, val);
 46}
 47
 48static int ucb1400_gpio_probe(struct platform_device *dev)
 49{
 50	struct ucb1400_gpio *ucb = dev->dev.platform_data;
 51	int err = 0;
 52
 53	if (!(ucbdata && ucbdata->gpio_offset)) {
 54		err = -EINVAL;
 55		goto err;
 56	}
 57
 58	platform_set_drvdata(dev, ucb);
 59
 60	ucb->gc.label = "ucb1400_gpio";
 61	ucb->gc.base = ucbdata->gpio_offset;
 62	ucb->gc.ngpio = 10;
 63	ucb->gc.owner = THIS_MODULE;
 64
 65	ucb->gc.direction_input = ucb1400_gpio_dir_in;
 66	ucb->gc.direction_output = ucb1400_gpio_dir_out;
 67	ucb->gc.get = ucb1400_gpio_get;
 68	ucb->gc.set = ucb1400_gpio_set;
 69	ucb->gc.can_sleep = 1;
 70
 71	err = gpiochip_add(&ucb->gc);
 72	if (err)
 73		goto err;
 74
 75	if (ucbdata && ucbdata->gpio_setup)
 76		err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio);
 77
 78err:
 79	return err;
 80
 81}
 82
 83static int ucb1400_gpio_remove(struct platform_device *dev)
 84{
 85	int err = 0;
 86	struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
 87
 88	if (ucbdata && ucbdata->gpio_teardown) {
 89		err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio);
 90		if (err)
 91			return err;
 92	}
 93
 94	err = gpiochip_remove(&ucb->gc);
 95	return err;
 96}
 97
 98static struct platform_driver ucb1400_gpio_driver = {
 99	.probe	= ucb1400_gpio_probe,
100	.remove	= ucb1400_gpio_remove,
101	.driver	= {
102		.name	= "ucb1400_gpio"
103	},
104};
105
106static int __init ucb1400_gpio_init(void)
107{
108	return platform_driver_register(&ucb1400_gpio_driver);
109}
110
111static void __exit ucb1400_gpio_exit(void)
112{
113	platform_driver_unregister(&ucb1400_gpio_driver);
114}
115
116void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
117{
118	ucbdata = data;
119}
120
121module_init(ucb1400_gpio_init);
122module_exit(ucb1400_gpio_exit);
123
124MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
125MODULE_LICENSE("GPL");