include/linux/pinctrl/machine.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Machine interface for the pinctrl subsystem.
   4  *
   5  * Copyright (C) 2011 ST-Ericsson SA
   6  * Written on behalf of Linaro for ST-Ericsson
   7  * Based on bits of regulator core, gpio core and clk core
   8  *
   9  * Author: Linus Walleij <linus.walleij@linaro.org>
  10  */
  11 #ifndef __LINUX_PINCTRL_MACHINE_H
  12 #define __LINUX_PINCTRL_MACHINE_H
  13
  14 #include <linux/array_size.h>
  15
  16 #include <linux/pinctrl/pinctrl-state.h>
  17
  18 enum pinctrl_map_type {
  19         PIN_MAP_TYPE_INVALID,
  20         PIN_MAP_TYPE_DUMMY_STATE,
  21         PIN_MAP_TYPE_MUX_GROUP,
  22         PIN_MAP_TYPE_CONFIGS_PIN,
  23         PIN_MAP_TYPE_CONFIGS_GROUP,
  24 };
  25
  26 /**
  27  * struct pinctrl_map_mux - mapping table content for MAP_TYPE_MUX_GROUP
  28  * @group: the name of the group whose mux function is to be configured. This
  29  *      field may be left NULL, and the first applicable group for the function
  30  *      will be used.
  31  * @function: the mux function to select for the group
  32  */
  33 struct pinctrl_map_mux {
  34         const char *group;
  35         const char *function;
  36 };
  37
  38 /**
  39  * struct pinctrl_map_configs - mapping table content for MAP_TYPE_CONFIGS_*
  40  * @group_or_pin: the name of the pin or group whose configuration parameters
  41  *      are to be configured.
  42  * @configs: a pointer to an array of config parameters/values to program into
  43  *      hardware. Each individual pin controller defines the format and meaning
  44  *      of config parameters.
  45  * @num_configs: the number of entries in array @configs
  46  */
  47 struct pinctrl_map_configs {
  48         const char *group_or_pin;
  49         unsigned long *configs;
  50         unsigned int num_configs;
  51 };
  52
  53 /**
  54  * struct pinctrl_map - boards/machines shall provide this map for devices
  55  * @dev_name: the name of the device using this specific mapping, the name
  56  *      must be the same as in your struct device*. If this name is set to the
  57  *      same name as the pin controllers own dev_name(), the map entry will be
  58  *      hogged by the driver itself upon registration
  59  * @name: the name of this specific map entry for the particular machine.
  60  *      This is the parameter passed to pinmux_lookup_state()
  61  * @type: the type of mapping table entry
  62  * @ctrl_dev_name: the name of the device controlling this specific mapping,
  63  *      the name must be the same as in your struct device*. This field is not
  64  *      used for PIN_MAP_TYPE_DUMMY_STATE
  65  * @data: Data specific to the mapping type
  66  */
  67 struct pinctrl_map {
  68         const char *dev_name;
  69         const char *name;
  70         enum pinctrl_map_type type;
  71         const char *ctrl_dev_name;
  72         union {
  73                 struct pinctrl_map_mux mux;
  74                 struct pinctrl_map_configs configs;
  75         } data;
  76 };
  77
  78 /* Convenience macros to create mapping table entries */
  79
  80 #define PIN_MAP_DUMMY_STATE(dev, state) \
  81         {                                                               \
  82                 .dev_name = dev,                                        \
  83                 .name = state,                                          \
  84                 .type = PIN_MAP_TYPE_DUMMY_STATE,                       \
  85         }
  86
  87 #define PIN_MAP_MUX_GROUP(dev, state, pinctrl, grp, func)               \
  88         {                                                               \
  89                 .dev_name = dev,                                        \
  90                 .name = state,                                          \
  91                 .type = PIN_MAP_TYPE_MUX_GROUP,                         \
  92                 .ctrl_dev_name = pinctrl,                               \
  93                 .data.mux = {                                           \
  94                         .group = grp,                                   \
  95                         .function = func,                               \
  96                 },                                                      \
  97         }
  98
  99 #define PIN_MAP_MUX_GROUP_DEFAULT(dev, pinctrl, grp, func)              \
 100         PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, func)
 101
 102 #define PIN_MAP_MUX_GROUP_HOG(dev, state, grp, func)                    \
 103         PIN_MAP_MUX_GROUP(dev, state, dev, grp, func)
 104
 105 #define PIN_MAP_MUX_GROUP_HOG_DEFAULT(dev, grp, func)                   \
 106         PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, func)
 107
 108 #define PIN_MAP_CONFIGS_PIN(dev, state, pinctrl, pin, cfgs)             \
 109         {                                                               \
 110                 .dev_name = dev,                                        \
 111                 .name = state,                                          \
 112                 .type = PIN_MAP_TYPE_CONFIGS_PIN,                       \
 113                 .ctrl_dev_name = pinctrl,                               \
 114                 .data.configs = {                                       \
 115                         .group_or_pin = pin,                            \
 116                         .configs = cfgs,                                \
 117                         .num_configs = ARRAY_SIZE(cfgs),                \
 118                 },                                                      \
 119         }
 120
 121 #define PIN_MAP_CONFIGS_PIN_DEFAULT(dev, pinctrl, pin, cfgs)            \
 122         PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, pinctrl, pin, cfgs)
 123
 124 #define PIN_MAP_CONFIGS_PIN_HOG(dev, state, pin, cfgs)                  \
 125         PIN_MAP_CONFIGS_PIN(dev, state, dev, pin, cfgs)
 126
 127 #define PIN_MAP_CONFIGS_PIN_HOG_DEFAULT(dev, pin, cfgs)                 \
 128         PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, dev, pin, cfgs)
 129
 130 #define PIN_MAP_CONFIGS_GROUP(dev, state, pinctrl, grp, cfgs)           \
 131         {                                                               \
 132                 .dev_name = dev,                                        \
 133                 .name = state,                                          \
 134                 .type = PIN_MAP_TYPE_CONFIGS_GROUP,                     \
 135                 .ctrl_dev_name = pinctrl,                               \
 136                 .data.configs = {                                       \
 137                         .group_or_pin = grp,                            \
 138                         .configs = cfgs,                                \
 139                         .num_configs = ARRAY_SIZE(cfgs),                \
 140                 },                                                      \
 141         }
 142
 143 #define PIN_MAP_CONFIGS_GROUP_DEFAULT(dev, pinctrl, grp, cfgs)          \
 144         PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, cfgs)
 145
 146 #define PIN_MAP_CONFIGS_GROUP_HOG(dev, state, grp, cfgs)                \
 147         PIN_MAP_CONFIGS_GROUP(dev, state, dev, grp, cfgs)
 148
 149 #define PIN_MAP_CONFIGS_GROUP_HOG_DEFAULT(dev, grp, cfgs)               \
 150         PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, cfgs)
 151
 152 struct pinctrl_map;
 153
 154 #ifdef CONFIG_PINCTRL
 155
 156 extern int pinctrl_register_mappings(const struct pinctrl_map *map,
 157                                      unsigned int num_maps);
 158 extern void pinctrl_unregister_mappings(const struct pinctrl_map *map);
 159 extern void pinctrl_provide_dummies(void);
 160 #else
 161
 162 static inline int pinctrl_register_mappings(const struct pinctrl_map *map,
 163                                             unsigned int num_maps)
 164 {
 165         return 0;
 166 }
 167
 168 static inline void pinctrl_unregister_mappings(const struct pinctrl_map *map)
 169 {
 170 }
 171
 172 static inline void pinctrl_provide_dummies(void)
 173 {
 174 }
 175 #endif /* !CONFIG_PINCTRL */
 176 #endif