include/linux/pinctrl/consumer.h

   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 <linux/pinctrl/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 struct device;
  24
  25 #ifdef CONFIG_PINCTRL
  26
  27 /* External interface to pin control */
  28 extern int pinctrl_gpio_request(unsigned gpio);
  29 extern void pinctrl_gpio_free(unsigned gpio);
  30 extern int pinctrl_gpio_direction_input(unsigned gpio);
  31 extern int pinctrl_gpio_direction_output(unsigned gpio);
  32 extern int pinctrl_gpio_set_config(unsigned gpio, unsigned long config);
  33
  34 extern struct pinctrl * __must_check pinctrl_get(struct device *dev);
  35 extern void pinctrl_put(struct pinctrl *p);
  36 extern struct pinctrl_state * __must_check pinctrl_lookup_state(
  37                                                         struct pinctrl *p,
  38                                                         const char *name);
  39 extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s);
  40
  41 extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev);
  42 extern void devm_pinctrl_put(struct pinctrl *p);
  43
  44 #ifdef CONFIG_PM
  45 extern int pinctrl_pm_select_default_state(struct device *dev);
  46 extern int pinctrl_pm_select_sleep_state(struct device *dev);
  47 extern int pinctrl_pm_select_idle_state(struct device *dev);
  48 #else
  49 static inline int pinctrl_pm_select_default_state(struct device *dev)
  50 {
  51         return 0;
  52 }
  53 static inline int pinctrl_pm_select_sleep_state(struct device *dev)
  54 {
  55         return 0;
  56 }
  57 static inline int pinctrl_pm_select_idle_state(struct device *dev)
  58 {
  59         return 0;
  60 }
  61 #endif
  62
  63 #else /* !CONFIG_PINCTRL */
  64
  65 static inline int pinctrl_gpio_request(unsigned gpio)
  66 {
  67         return 0;
  68 }
  69
  70 static inline void pinctrl_gpio_free(unsigned gpio)
  71 {
  72 }
  73
  74 static inline int pinctrl_gpio_direction_input(unsigned gpio)
  75 {
  76         return 0;
  77 }
  78
  79 static inline int pinctrl_gpio_direction_output(unsigned gpio)
  80 {
  81         return 0;
  82 }
  83
  84 static inline int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
  85 {
  86         return 0;
  87 }
  88
  89 static inline struct pinctrl * __must_check pinctrl_get(struct device *dev)
  90 {
  91         return NULL;
  92 }
  93
  94 static inline void pinctrl_put(struct pinctrl *p)
  95 {
  96 }
  97
  98 static inline struct pinctrl_state * __must_check pinctrl_lookup_state(
  99                                                         struct pinctrl *p,
 100                                                         const char *name)
 101 {
 102         return NULL;
 103 }
 104
 105 static inline int pinctrl_select_state(struct pinctrl *p,
 106                                        struct pinctrl_state *s)
 107 {
 108         return 0;
 109 }
 110
 111 static inline struct pinctrl * __must_check devm_pinctrl_get(struct device *dev)
 112 {
 113         return NULL;
 114 }
 115
 116 static inline void devm_pinctrl_put(struct pinctrl *p)
 117 {
 118 }
 119
 120 static inline int pinctrl_pm_select_default_state(struct device *dev)
 121 {
 122         return 0;
 123 }
 124
 125 static inline int pinctrl_pm_select_sleep_state(struct device *dev)
 126 {
 127         return 0;
 128 }
 129
 130 static inline int pinctrl_pm_select_idle_state(struct device *dev)
 131 {
 132         return 0;
 133 }
 134
 135 #endif /* CONFIG_PINCTRL */
 136
 137 static inline struct pinctrl * __must_check pinctrl_get_select(
 138                                         struct device *dev, const char *name)
 139 {
 140         struct pinctrl *p;
 141         struct pinctrl_state *s;
 142         int ret;
 143
 144         p = pinctrl_get(dev);
 145         if (IS_ERR(p))
 146                 return p;
 147
 148         s = pinctrl_lookup_state(p, name);
 149         if (IS_ERR(s)) {
 150                 pinctrl_put(p);
 151                 return ERR_CAST(s);
 152         }
 153
 154         ret = pinctrl_select_state(p, s);
 155         if (ret < 0) {
 156                 pinctrl_put(p);
 157                 return ERR_PTR(ret);
 158         }
 159
 160         return p;
 161 }
 162
 163 static inline struct pinctrl * __must_check pinctrl_get_select_default(
 164                                         struct device *dev)
 165 {
 166         return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
 167 }
 168
 169 static inline struct pinctrl * __must_check devm_pinctrl_get_select(
 170                                         struct device *dev, const char *name)
 171 {
 172         struct pinctrl *p;
 173         struct pinctrl_state *s;
 174         int ret;
 175
 176         p = devm_pinctrl_get(dev);
 177         if (IS_ERR(p))
 178                 return p;
 179
 180         s = pinctrl_lookup_state(p, name);
 181         if (IS_ERR(s)) {
 182                 devm_pinctrl_put(p);
 183                 return ERR_CAST(s);
 184         }
 185
 186         ret = pinctrl_select_state(p, s);
 187         if (ret < 0) {
 188                 devm_pinctrl_put(p);
 189                 return ERR_PTR(ret);
 190         }
 191
 192         return p;
 193 }
 194
 195 static inline struct pinctrl * __must_check devm_pinctrl_get_select_default(
 196                                         struct device *dev)
 197 {
 198         return devm_pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
 199 }
 200
 201 #endif /* __LINUX_PINCTRL_CONSUMER_H */