include/linux/pinctrl/pinconf.h

   1 /*
   2  * Interface the pinconfig portions of the pinctrl subsystem
   3  *
   4  * Copyright (C) 2011 ST-Ericsson SA
   5  * Written on behalf of Linaro for ST-Ericsson
   6  * This interface is used in the core to keep track of pins.
   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_PINCONF_H
  13 #define __LINUX_PINCTRL_PINCONF_H
  14
  15 #ifdef CONFIG_PINCONF
  16
  17 struct pinctrl_dev;
  18 struct seq_file;
  19
  20 /**
  21  * struct pinconf_ops - pin config operations, to be implemented by
  22  * pin configuration capable drivers.
  23  * @pin_config_get: get the config of a certain pin, if the requested config
  24  *      is not available on this controller this should return -ENOTSUPP
  25  *      and if it is available but disabled it should return -EINVAL
  26  * @pin_config_get: get the config of a certain pin
  27  * @pin_config_set: configure an individual pin
  28  * @pin_config_group_get: get configurations for an entire pin group
  29  * @pin_config_group_set: configure all pins in a group
  30  * @pin_config_dbg_show: optional debugfs display hook that will provide
  31  *      per-device info for a certain pin in debugfs
  32  * @pin_config_group_dbg_show: optional debugfs display hook that will provide
  33  *      per-device info for a certain group in debugfs
  34  */
  35 struct pinconf_ops {
  36         int (*pin_config_get) (struct pinctrl_dev *pctldev,
  37                                unsigned pin,
  38                                unsigned long *config);
  39         int (*pin_config_set) (struct pinctrl_dev *pctldev,
  40                                unsigned pin,
  41                                unsigned long config);
  42         int (*pin_config_group_get) (struct pinctrl_dev *pctldev,
  43                                      unsigned selector,
  44                                      unsigned long *config);
  45         int (*pin_config_group_set) (struct pinctrl_dev *pctldev,
  46                                      unsigned selector,
  47                                      unsigned long config);
  48         void (*pin_config_dbg_show) (struct pinctrl_dev *pctldev,
  49                                      struct seq_file *s,
  50                                      unsigned offset);
  51         void (*pin_config_group_dbg_show) (struct pinctrl_dev *pctldev,
  52                                            struct seq_file *s,
  53                                            unsigned selector);
  54 };
  55
  56 extern int pin_config_get(const char *dev_name, const char *name,
  57                           unsigned long *config);
  58 extern int pin_config_set(const char *dev_name, const char *name,
  59                           unsigned long config);
  60 extern int pin_config_group_get(const char *dev_name,
  61                                 const char *pin_group,
  62                                 unsigned long *config);
  63 extern int pin_config_group_set(const char *dev_name,
  64                                 const char *pin_group,
  65                                 unsigned long config);
  66
  67 #else
  68
  69 static inline int pin_config_get(const char *dev_name, const char *name,
  70                                  unsigned long *config)
  71 {
  72         return 0;
  73 }
  74
  75 static inline int pin_config_set(const char *dev_name, const char *name,
  76                                  unsigned long config)
  77 {
  78         return 0;
  79 }
  80
  81 static inline int pin_config_group_get(const char *dev_name,
  82                                        const char *pin_group,
  83                                        unsigned long *config)
  84 {
  85         return 0;
  86 }
  87
  88 static inline int pin_config_group_set(const char *dev_name,
  89                                        const char *pin_group,
  90                                        unsigned long config)
  91 {
  92         return 0;
  93 }
  94
  95 #endif
  96
  97 #endif /* __LINUX_PINCTRL_PINCONF_H */