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/list.h>
  16 #include <linux/seq_file.h>
  17 #include "pinctrl.h"
  18
  19 /* This struct is private to the core and should be regarded as a cookie */
  20 struct pinctrl;
  21
  22 #ifdef CONFIG_PINCTRL
  23
  24 /* External interface to pin control */
  25 extern int pinctrl_request_gpio(unsigned gpio);
  26 extern void pinctrl_free_gpio(unsigned gpio);
  27 extern int pinctrl_gpio_direction_input(unsigned gpio);
  28 extern int pinctrl_gpio_direction_output(unsigned gpio);
  29 extern struct pinctrl * __must_check pinctrl_get(struct device *dev, const char *name);
  30 extern void pinctrl_put(struct pinctrl *p);
  31 extern int pinctrl_enable(struct pinctrl *p);
  32 extern void pinctrl_disable(struct pinctrl *p);
  33
  34 #else /* !CONFIG_PINCTRL */
  35
  36 static inline int pinctrl_request_gpio(unsigned gpio)
  37 {
  38         return 0;
  39 }
  40
  41 static inline void pinctrl_free_gpio(unsigned gpio)
  42 {
  43 }
  44
  45 static inline int pinctrl_gpio_direction_input(unsigned gpio)
  46 {
  47         return 0;
  48 }
  49
  50 static inline int pinctrl_gpio_direction_output(unsigned gpio)
  51 {
  52         return 0;
  53 }
  54
  55 static inline struct pinctrl * __must_check pinctrl_get(struct device *dev, const char *name)
  56 {
  57         return NULL;
  58 }
  59
  60 static inline void pinctrl_put(struct pinctrl *p)
  61 {
  62 }
  63
  64 static inline int pinctrl_enable(struct pinctrl *p)
  65 {
  66         return 0;
  67 }
  68
  69 static inline void pinctrl_disable(struct pinctrl *p)
  70 {
  71 }
  72
  73 #endif /* CONFIG_PINCTRL */
  74
  75 #ifdef CONFIG_PINCONF
  76
  77 extern int pin_config_get(const char *dev_name, const char *name,
  78                           unsigned long *config);
  79 extern int pin_config_set(const char *dev_name, const char *name,
  80                           unsigned long config);
  81 extern int pin_config_group_get(const char *dev_name,
  82                                 const char *pin_group,
  83                                 unsigned long *config);
  84 extern int pin_config_group_set(const char *dev_name,
  85                                 const char *pin_group,
  86                                 unsigned long config);
  87
  88 #else
  89
  90 static inline int pin_config_get(const char *dev_name, const char *name,
  91                                  unsigned long *config)
  92 {
  93         return 0;
  94 }
  95
  96 static inline int pin_config_set(const char *dev_name, const char *name,
  97                                  unsigned long config)
  98 {
  99         return 0;
 100 }
 101
 102 static inline int pin_config_group_get(const char *dev_name,
 103                                        const char *pin_group,
 104                                        unsigned long *config)
 105 {
 106         return 0;
 107 }
 108
 109 static inline int pin_config_group_set(const char *dev_name,
 110                                        const char *pin_group,
 111                                        unsigned long config)
 112 {
 113         return 0;
 114 }
 115
 116 #endif
 117
 118 #endif /* __LINUX_PINCTRL_CONSUMER_H */