summaryrefslogtreecommitdiff
path: root/include/linux/pinctrl/consumer.h
blob: 4729d54e8995359cd7f2a494ba99c012bf4c83cb (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
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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Consumer interface the pin control subsystem
 *
 * Copyright (C) 2012 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 * Based on bits of regulator core, gpio core and clk core
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 */
#ifndef __LINUX_PINCTRL_CONSUMER_H
#define __LINUX_PINCTRL_CONSUMER_H

#include <linux/err.h>
#include <linux/types.h>

#include <linux/pinctrl/pinctrl-state.h>

struct device;

/* This struct is private to the core and should be regarded as a cookie */
struct pinctrl;
struct pinctrl_state;

#ifdef CONFIG_PINCTRL

/* External interface to pin control */
extern bool pinctrl_gpio_can_use_line(unsigned gpio);
extern int pinctrl_gpio_request(unsigned gpio);
extern void pinctrl_gpio_free(unsigned gpio);
extern int pinctrl_gpio_direction_input(unsigned gpio);
extern int pinctrl_gpio_direction_output(unsigned gpio);
extern int pinctrl_gpio_set_config(unsigned gpio, unsigned long config);

extern struct pinctrl * __must_check pinctrl_get(struct device *dev);
extern void pinctrl_put(struct pinctrl *p);
extern struct pinctrl_state * __must_check pinctrl_lookup_state(struct pinctrl *p,
								const char *name);
extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s);

extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev);
extern void devm_pinctrl_put(struct pinctrl *p);
extern int pinctrl_select_default_state(struct device *dev);

#ifdef CONFIG_PM
extern int pinctrl_pm_select_default_state(struct device *dev);
extern int pinctrl_pm_select_sleep_state(struct device *dev);
extern int pinctrl_pm_select_idle_state(struct device *dev);
#else
static inline int pinctrl_pm_select_default_state(struct device *dev)
{
	return 0;
}
static inline int pinctrl_pm_select_sleep_state(struct device *dev)
{
	return 0;
}
static inline int pinctrl_pm_select_idle_state(struct device *dev)
{
	return 0;
}
#endif

#else /* !CONFIG_PINCTRL */

static inline bool pinctrl_gpio_can_use_line(unsigned gpio)
{
	return true;
}

static inline int pinctrl_gpio_request(unsigned gpio)
{
	return 0;
}

static inline void pinctrl_gpio_free(unsigned gpio)
{
}

static inline int pinctrl_gpio_direction_input(unsigned gpio)
{
	return 0;
}

static inline int pinctrl_gpio_direction_output(unsigned gpio)
{
	return 0;
}

static inline int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
{
	return 0;
}

static inline struct pinctrl * __must_check pinctrl_get(struct device *dev)
{
	return NULL;
}

static inline void pinctrl_put(struct pinctrl *p)
{
}

static inline struct pinctrl_state * __must_check pinctrl_lookup_state(struct pinctrl *p,
								       const char *name)
{
	return NULL;
}

static inline int pinctrl_select_state(struct pinctrl *p,
				       struct pinctrl_state *s)
{
	return 0;
}

static inline struct pinctrl * __must_check devm_pinctrl_get(struct device *dev)
{
	return NULL;
}

static inline void devm_pinctrl_put(struct pinctrl *p)
{
}

static inline int pinctrl_select_default_state(struct device *dev)
{
	return 0;
}

static inline int pinctrl_pm_select_default_state(struct device *dev)
{
	return 0;
}

static inline int pinctrl_pm_select_sleep_state(struct device *dev)
{
	return 0;
}

static inline int pinctrl_pm_select_idle_state(struct device *dev)
{
	return 0;
}

#endif /* CONFIG_PINCTRL */

static inline struct pinctrl * __must_check pinctrl_get_select(struct device *dev,
							       const char *name)
{
	struct pinctrl *p;
	struct pinctrl_state *s;
	int ret;

	p = pinctrl_get(dev);
	if (IS_ERR(p))
		return p;

	s = pinctrl_lookup_state(p, name);
	if (IS_ERR(s)) {
		pinctrl_put(p);
		return ERR_CAST(s);
	}

	ret = pinctrl_select_state(p, s);
	if (ret < 0) {
		pinctrl_put(p);
		return ERR_PTR(ret);
	}

	return p;
}

static inline struct pinctrl * __must_check pinctrl_get_select_default(struct device *dev)
{
	return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
}

static inline struct pinctrl * __must_check devm_pinctrl_get_select(struct device *dev,
								    const char *name)
{
	struct pinctrl *p;
	struct pinctrl_state *s;
	int ret;

	p = devm_pinctrl_get(dev);
	if (IS_ERR(p))
		return p;

	s = pinctrl_lookup_state(p, name);
	if (IS_ERR(s)) {
		devm_pinctrl_put(p);
		return ERR_CAST(s);
	}

	ret = pinctrl_select_state(p, s);
	if (ret < 0) {
		devm_pinctrl_put(p);
		return ERR_PTR(ret);
	}

	return p;
}

static inline struct pinctrl * __must_check devm_pinctrl_get_select_default(struct device *dev)
{
	return devm_pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
}

#endif /* __LINUX_PINCTRL_CONSUMER_H */