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
|
/*
* Copyright (C) ST-Ericsson SA 2010
* Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-sysctrl.h>
static struct device *sysctrl_dev;
static inline bool valid_bank(u8 bank)
{
return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
(bank == AB8500_SYS_CTRL2_BLOCK));
}
int ab8500_sysctrl_read(u16 reg, u8 *value)
{
u8 bank;
if (sysctrl_dev == NULL)
return -EAGAIN;
bank = (reg >> 8);
if (!valid_bank(bank))
return -EINVAL;
return abx500_get_register_interruptible(sysctrl_dev, bank,
(u8)(reg & 0xFF), value);
}
int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
{
u8 bank;
if (sysctrl_dev == NULL)
return -EAGAIN;
bank = (reg >> 8);
if (!valid_bank(bank))
return -EINVAL;
return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
(u8)(reg & 0xFF), mask, value);
}
static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev)
{
sysctrl_dev = &pdev->dev;
return 0;
}
static int __devexit ab8500_sysctrl_remove(struct platform_device *pdev)
{
sysctrl_dev = NULL;
return 0;
}
static const struct of_device_id ab8500_sysctrl_match[] = {
{ .compatible = "stericsson,ab8500-sysctrl", },
{}
};
static struct platform_driver ab8500_sysctrl_driver = {
.driver = {
.name = "ab8500-sysctrl",
.owner = THIS_MODULE,
.of_match_table = ab8500_sysctrl_match,
},
.probe = ab8500_sysctrl_probe,
.remove = __devexit_p(ab8500_sysctrl_remove),
};
static int __init ab8500_sysctrl_init(void)
{
return platform_driver_register(&ab8500_sysctrl_driver);
}
subsys_initcall(ab8500_sysctrl_init);
MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com");
MODULE_DESCRIPTION("AB8500 system control driver");
MODULE_LICENSE("GPL v2");
|
