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
|
/*
* TI TPS6591x GPIO driver
*
* Copyright 2010 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
* Author: Jorge Eduardo Candelaria jedu@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.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/tps65910.h>
static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
uint8_t val;
tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);
if (val & GPIO_STS_MASK)
return 1;
return 0;
}
static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
if (value)
tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_SET_MASK);
else
tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_SET_MASK);
}
static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
/* Set the initial value */
tps65910_gpio_set(gc, 0, value);
return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_CFG_MASK);
}
static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_CFG_MASK);
}
void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
{
int ret;
if (!gpio_base)
return;
tps65910->gpio.owner = THIS_MODULE;
tps65910->gpio.label = tps65910->i2c_client->name;
tps65910->gpio.dev = tps65910->dev;
tps65910->gpio.base = gpio_base;
switch(tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910->gpio.ngpio = 6;
break;
case TPS65911:
tps65910->gpio.ngpio = 9;
break;
default:
return;
}
tps65910->gpio.can_sleep = 1;
tps65910->gpio.direction_input = tps65910_gpio_input;
tps65910->gpio.direction_output = tps65910_gpio_output;
tps65910->gpio.set = tps65910_gpio_set;
tps65910->gpio.get = tps65910_gpio_get;
ret = gpiochip_add(&tps65910->gpio);
if (ret)
dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
}
|
