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
// SPDX-License-Identifier: GPL-2.0-only
/*
* Utils functions to implement the pincontrol driver.
*
* Copyright (c) 2013, NVIDIA Corporation.
*
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*/
#include <linux/array_size.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/pinctrl/pinctrl.h>
#include "core.h"
#include "pinctrl-utils.h"
int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
struct pinctrl_map **map, unsigned int *reserved_maps,
unsigned int *num_maps, unsigned int reserve)
{
unsigned int old_num = *reserved_maps;
unsigned int new_num = *num_maps + reserve;
struct pinctrl_map *new_map;
if (old_num >= new_num)
return 0;
new_map = krealloc_array(*map, new_num, sizeof(*new_map), GFP_KERNEL);
if (!new_map) {
dev_err(pctldev->dev, "krealloc(map) failed\n");
return -ENOMEM;
}
memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
*map = new_map;
*reserved_maps = new_num;
return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
struct pinctrl_map **map, unsigned int *reserved_maps,
unsigned int *num_maps, const char *group,
const char *function)
{
if (WARN_ON(*num_maps == *reserved_maps))
return -ENOSPC;
(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
(*map)[*num_maps].data.mux.group = group;
(*map)[*num_maps].data.mux.function = function;
(*num_maps)++;
return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
struct pinctrl_map **map, unsigned int *reserved_maps,
unsigned int *num_maps, const char *group,
unsigned long *configs, unsigned int num_configs,
enum pinctrl_map_type type)
{
unsigned long *dup_configs;
if (WARN_ON(*num_maps == *reserved_maps))
return -ENOSPC;
dup_configs = kmemdup_array(configs, num_configs,
sizeof(*dup_configs), GFP_KERNEL);
if (!dup_configs)
return -ENOMEM;
(*map)[*num_maps].type = type;
(*map)[*num_maps].data.configs.group_or_pin = group;
(*map)[*num_maps].data.configs.configs = dup_configs;
(*map)[*num_maps].data.configs.num_configs = num_configs;
(*num_maps)++;
return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
unsigned long **configs, unsigned int *num_configs,
unsigned long config)
{
unsigned int old_num = *num_configs;
unsigned int new_num = old_num + 1;
unsigned long *new_configs;
new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
GFP_KERNEL);
if (!new_configs) {
dev_err(pctldev->dev, "krealloc(configs) failed\n");
return -ENOMEM;
}
new_configs[old_num] = config;
*configs = new_configs;
*num_configs = new_num;
return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
void pinctrl_utils_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned int num_maps)
{
int i;
for (i = 0; i < num_maps; i++) {
switch (map[i].type) {
case PIN_MAP_TYPE_CONFIGS_GROUP:
case PIN_MAP_TYPE_CONFIGS_PIN:
kfree(map[i].data.configs.configs);
break;
default:
break;
}
}
kfree(map);
}
EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);