blob: 38c1d47b29a1efae11ccf916143f54da781a8bb0 (
plain)
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
|
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/err.h>
#include <plat/pincfg.h>
#include "pins.h"
static LIST_HEAD(pin_lookups);
static DEFINE_MUTEX(pin_lookups_mutex);
static DEFINE_SPINLOCK(pins_lock);
void __init ux500_pins_add(struct ux500_pin_lookup *pl, size_t num)
{
mutex_lock(&pin_lookups_mutex);
while (num--) {
list_add_tail(&pl->node, &pin_lookups);
pl++;
}
mutex_unlock(&pin_lookups_mutex);
}
struct ux500_pins *ux500_pins_get(const char *name)
{
struct ux500_pins *pins = NULL;
struct ux500_pin_lookup *pl;
mutex_lock(&pin_lookups_mutex);
list_for_each_entry(pl, &pin_lookups, node) {
if (!strcmp(pl->name, name)) {
pins = pl->pins;
goto out;
}
}
out:
mutex_unlock(&pin_lookups_mutex);
return pins;
}
int ux500_pins_enable(struct ux500_pins *pins)
{
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&pins_lock, flags);
if (pins->usage++ == 0)
ret = nmk_config_pins(pins->cfg, pins->num);
spin_unlock_irqrestore(&pins_lock, flags);
return ret;
}
int ux500_pins_disable(struct ux500_pins *pins)
{
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&pins_lock, flags);
if (WARN_ON(pins->usage == 0))
goto out;
if (--pins->usage == 0)
ret = nmk_config_pins_sleep(pins->cfg, pins->num);
out:
spin_unlock_irqrestore(&pins_lock, flags);
return ret;
}
void ux500_pins_put(struct ux500_pins *pins)
{
WARN_ON(!pins);
}
|
