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
|
/*
* Copyright 2011 Texas Instruments Inc.
*
* Author: Margarita Olaya <magi@slimlogic.co.uk>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This driver is based on wm8350 implementation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/mfd/tps65912.h>
struct tps65912_gpio_data {
struct tps65912 *tps65912;
struct gpio_chip gpio_chip;
};
#define to_tgd(gc) container_of(gc, struct tps65912_gpio_data, gpio_chip)
static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
int val;
val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
if (val & GPIO_STS_MASK)
return 1;
return 0;
}
static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
if (value)
tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
GPIO_SET_MASK);
else
tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
GPIO_SET_MASK);
}
static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
/* Set the initial value */
tps65912_gpio_set(gc, offset, value);
return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
GPIO_CFG_MASK);
}
static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
{
struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
GPIO_CFG_MASK);
}
static struct gpio_chip template_chip = {
.label = "tps65912",
.owner = THIS_MODULE,
.direction_input = tps65912_gpio_input,
.direction_output = tps65912_gpio_output,
.get = tps65912_gpio_get,
.set = tps65912_gpio_set,
.can_sleep = true,
.ngpio = 5,
.base = -1,
};
static int tps65912_gpio_probe(struct platform_device *pdev)
{
struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
struct tps65912_gpio_data *tps65912_gpio;
int ret;
tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
GFP_KERNEL);
if (tps65912_gpio == NULL)
return -ENOMEM;
tps65912_gpio->tps65912 = tps65912;
tps65912_gpio->gpio_chip = template_chip;
tps65912_gpio->gpio_chip.dev = &pdev->dev;
if (pdata && pdata->gpio_base)
tps65912_gpio->gpio_chip.base = pdata->gpio_base;
ret = gpiochip_add(&tps65912_gpio->gpio_chip);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, tps65912_gpio);
return ret;
}
static int tps65912_gpio_remove(struct platform_device *pdev)
{
struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
gpiochip_remove(&tps65912_gpio->gpio_chip);
return 0;
}
static struct platform_driver tps65912_gpio_driver = {
.driver = {
.name = "tps65912-gpio",
},
.probe = tps65912_gpio_probe,
.remove = tps65912_gpio_remove,
};
static int __init tps65912_gpio_init(void)
{
return platform_driver_register(&tps65912_gpio_driver);
}
subsys_initcall(tps65912_gpio_init);
static void __exit tps65912_gpio_exit(void)
{
platform_driver_unregister(&tps65912_gpio_driver);
}
module_exit(tps65912_gpio_exit);
MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65912-gpio");
|
