1 /*
2 * Consumer interface the pin control subsystem
3 *
4 * Copyright (C) 2012 ST-Ericsson SA
5 * Written on behalf of Linaro for ST-Ericsson
6 * Based on bits of regulator core, gpio core and clk core
7 *
8 * Author: Linus Walleij <linus.walleij@linaro.org>
9 *
10 * License terms: GNU General Public License (GPL) version 2
11 */
12 #ifndef __LINUX_PINCTRL_CONSUMER_H
13 #define __LINUX_PINCTRL_CONSUMER_H
14
15 #include <linux/err.h>
16 #include <linux/list.h>
17 #include <linux/seq_file.h>
18 #include "pinctrl-state.h"
19
20 /* This struct is private to the core and should be regarded as a cookie */
21 struct pinctrl;
22 struct pinctrl_state;
23
24 #ifdef CONFIG_PINCTRL
25
26 /* External interface to pin control */
27 extern int pinctrl_request_gpio(unsigned gpio);
28 extern void pinctrl_free_gpio(unsigned gpio);
29 extern int pinctrl_gpio_direction_input(unsigned gpio);
30 extern int pinctrl_gpio_direction_output(unsigned gpio);
31
32 extern struct pinctrl * __must_check pinctrl_get(struct device *dev);
33 extern void pinctrl_put(struct pinctrl *p);
34 extern struct pinctrl_state * __must_check pinctrl_lookup_state(
35 struct pinctrl *p,
36 const char *name);
37 extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s);
38
39 #else /* !CONFIG_PINCTRL */
40
pinctrl_request_gpio(unsigned gpio)41 static inline int pinctrl_request_gpio(unsigned gpio)
42 {
43 return 0;
44 }
45
pinctrl_free_gpio(unsigned gpio)46 static inline void pinctrl_free_gpio(unsigned gpio)
47 {
48 }
49
pinctrl_gpio_direction_input(unsigned gpio)50 static inline int pinctrl_gpio_direction_input(unsigned gpio)
51 {
52 return 0;
53 }
54
pinctrl_gpio_direction_output(unsigned gpio)55 static inline int pinctrl_gpio_direction_output(unsigned gpio)
56 {
57 return 0;
58 }
59
pinctrl_get(struct device * dev)60 static inline struct pinctrl * __must_check pinctrl_get(struct device *dev)
61 {
62 return NULL;
63 }
64
pinctrl_put(struct pinctrl * p)65 static inline void pinctrl_put(struct pinctrl *p)
66 {
67 }
68
pinctrl_lookup_state(struct pinctrl * p,const char * name)69 static inline struct pinctrl_state * __must_check pinctrl_lookup_state(
70 struct pinctrl *p,
71 const char *name)
72 {
73 return NULL;
74 }
75
pinctrl_select_state(struct pinctrl * p,struct pinctrl_state * s)76 static inline int pinctrl_select_state(struct pinctrl *p,
77 struct pinctrl_state *s)
78 {
79 return 0;
80 }
81
82 #endif /* CONFIG_PINCTRL */
83
pinctrl_get_select(struct device * dev,const char * name)84 static inline struct pinctrl * __must_check pinctrl_get_select(
85 struct device *dev, const char *name)
86 {
87 struct pinctrl *p;
88 struct pinctrl_state *s;
89 int ret;
90
91 p = pinctrl_get(dev);
92 if (IS_ERR(p))
93 return p;
94
95 s = pinctrl_lookup_state(p, name);
96 if (IS_ERR(s)) {
97 pinctrl_put(p);
98 return ERR_PTR(PTR_ERR(s));
99 }
100
101 ret = pinctrl_select_state(p, s);
102 if (ret < 0) {
103 pinctrl_put(p);
104 return ERR_PTR(ret);
105 }
106
107 return p;
108 }
109
pinctrl_get_select_default(struct device * dev)110 static inline struct pinctrl * __must_check pinctrl_get_select_default(
111 struct device *dev)
112 {
113 return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
114 }
115
116 #ifdef CONFIG_PINCONF
117
118 extern int pin_config_get(const char *dev_name, const char *name,
119 unsigned long *config);
120 extern int pin_config_set(const char *dev_name, const char *name,
121 unsigned long config);
122 extern int pin_config_group_get(const char *dev_name,
123 const char *pin_group,
124 unsigned long *config);
125 extern int pin_config_group_set(const char *dev_name,
126 const char *pin_group,
127 unsigned long config);
128
129 #else
130
pin_config_get(const char * dev_name,const char * name,unsigned long * config)131 static inline int pin_config_get(const char *dev_name, const char *name,
132 unsigned long *config)
133 {
134 return 0;
135 }
136
pin_config_set(const char * dev_name,const char * name,unsigned long config)137 static inline int pin_config_set(const char *dev_name, const char *name,
138 unsigned long config)
139 {
140 return 0;
141 }
142
pin_config_group_get(const char * dev_name,const char * pin_group,unsigned long * config)143 static inline int pin_config_group_get(const char *dev_name,
144 const char *pin_group,
145 unsigned long *config)
146 {
147 return 0;
148 }
149
pin_config_group_set(const char * dev_name,const char * pin_group,unsigned long config)150 static inline int pin_config_group_set(const char *dev_name,
151 const char *pin_group,
152 unsigned long config)
153 {
154 return 0;
155 }
156
157 #endif
158
159 #endif /* __LINUX_PINCTRL_CONSUMER_H */
160