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
 15static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
 16{
 17	struct ucb1400_gpio *gpio;
 18	gpio = container_of(gc, struct ucb1400_gpio, gc);
 19	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;
 26	gpio = container_of(gc, struct ucb1400_gpio, gc);
 27	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;
 35	gpio = container_of(gc, struct ucb1400_gpio, gc);
 36	return ucb1400_gpio_get_value(gpio->ac97, off);
 
 37}
 38
 39static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
 40{
 41	struct ucb1400_gpio *gpio;
 42	gpio = container_of(gc, struct ucb1400_gpio, gc);
 43	ucb1400_gpio_set_value(gpio->ac97, off, val);
 44}
 45
 46static int ucb1400_gpio_probe(struct platform_device *dev)
 47{
 48	struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
 49	int err = 0;
 50
 51	if (!(ucb && ucb->gpio_offset)) {
 52		err = -EINVAL;
 53		goto err;
 54	}
 55
 56	platform_set_drvdata(dev, ucb);
 57
 58	ucb->gc.label = "ucb1400_gpio";
 59	ucb->gc.base = ucb->gpio_offset;
 60	ucb->gc.ngpio = 10;
 61	ucb->gc.owner = THIS_MODULE;
 62
 63	ucb->gc.direction_input = ucb1400_gpio_dir_in;
 64	ucb->gc.direction_output = ucb1400_gpio_dir_out;
 65	ucb->gc.get = ucb1400_gpio_get;
 66	ucb->gc.set = ucb1400_gpio_set;
 67	ucb->gc.can_sleep = true;
 68
 69	err = gpiochip_add(&ucb->gc);
 70	if (err)
 71		goto err;
 72
 73	if (ucb && ucb->gpio_setup)
 74		err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
 75
 76err:
 77	return err;
 78
 79}
 80
 81static int ucb1400_gpio_remove(struct platform_device *dev)
 82{
 83	int err = 0;
 84	struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
 85
 86	if (ucb && ucb->gpio_teardown) {
 87		err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
 88		if (err)
 89			return err;
 90	}
 91
 92	err = gpiochip_remove(&ucb->gc);
 93	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
104module_platform_driver(ucb1400_gpio_driver);
105
106MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
107MODULE_LICENSE("GPL");
108MODULE_ALIAS("platform:ucb1400_gpio");