6b13f685e
 김민수
BSP 최초 추가
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* GPIO driver for RICOH583 power management chip.
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
* Author: Laxman dewangan <ldewangan@nvidia.com>
*
* Based on code
* Copyright (C) 2011 RICOH COMPANY,LTD
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/mfd/rc5t583.h>
struct rc5t583_gpio {
struct gpio_chip gpio_chip;
struct rc5t583 *rc5t583;
};
static inline struct rc5t583_gpio *to_rc5t583_gpio(struct gpio_chip *chip)
{
return container_of(chip, struct rc5t583_gpio, gpio_chip);
}
static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
struct device *parent = rc5t583_gpio->rc5t583->dev;
uint8_t val = 0;
int ret;
ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
if (ret < 0)
return ret;
return !!(val & BIT(offset));
}
static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
struct device *parent = rc5t583_gpio->rc5t583->dev;
if (val)
rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
else
rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
}
static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
struct device *parent = rc5t583_gpio->rc5t583->dev;
int ret;
ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
if (ret < 0)
return ret;
/* Set pin to gpio mode */
return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}
static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
struct device *parent = rc5t583_gpio->rc5t583->dev;
int ret;
rc5t583_gpio_set(gc, offset, value);
ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
if (ret < 0)
return ret;
/* Set pin to gpio mode */
return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}
static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
if ((offset >= 0) && (offset < 8))
return rc5t583_gpio->rc5t583->irq_base +
RC5T583_IRQ_GPIO0 + offset;
return -EINVAL;
}
static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
{
struct rc5t583_gpio *rc5t583_gpio = to_rc5t583_gpio(gc);
struct device *parent = rc5t583_gpio->rc5t583->dev;
rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}
static int rc5t583_gpio_probe(struct platform_device *pdev)
{
struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
struct rc5t583_gpio *rc5t583_gpio;
rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
GFP_KERNEL);
if (!rc5t583_gpio) {
dev_warn(&pdev->dev, "Mem allocation for rc5t583_gpio failed");
return -ENOMEM;
}
rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
rc5t583_gpio->gpio_chip.can_sleep = true,
rc5t583_gpio->gpio_chip.dev = &pdev->dev;
rc5t583_gpio->gpio_chip.base = -1;
rc5t583_gpio->rc5t583 = rc5t583;
if (pdata && pdata->gpio_base)
rc5t583_gpio->gpio_chip.base = pdata->gpio_base;
platform_set_drvdata(pdev, rc5t583_gpio);
return gpiochip_add(&rc5t583_gpio->gpio_chip);
}
static int rc5t583_gpio_remove(struct platform_device *pdev)
{
struct rc5t583_gpio *rc5t583_gpio = platform_get_drvdata(pdev);
return gpiochip_remove(&rc5t583_gpio->gpio_chip);
}
static struct platform_driver rc5t583_gpio_driver = {
.driver = {
.name = "rc5t583-gpio",
.owner = THIS_MODULE,
},
.probe = rc5t583_gpio_probe,
.remove = rc5t583_gpio_remove,
};
static int __init rc5t583_gpio_init(void)
{
return platform_driver_register(&rc5t583_gpio_driver);
}
subsys_initcall(rc5t583_gpio_init);
static void __exit rc5t583_gpio_exit(void)
{
platform_driver_unregister(&rc5t583_gpio_driver);
}
module_exit(rc5t583_gpio_exit);
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_DESCRIPTION("GPIO interface for RC5T583");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:rc5t583-gpio");
|