| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Internal interface between the core pin control system and the |
| 4 | * pinmux portions |
| 5 | * |
| 6 | * Copyright (C) 2011 ST-Ericsson SA |
| 7 | * Written on behalf of Linaro for ST-Ericsson |
| 8 | * Based on bits of regulator core, gpio core and clk core |
| 9 | * |
| 10 | * Author: Linus Walleij <linus.walleij@linaro.org> |
| 11 | */ |
| 12 | |
| 13 | #include <linux/types.h> |
| 14 | |
| 15 | struct dentry; |
| 16 | struct seq_file; |
| 17 | |
| 18 | struct pinctrl_dev; |
| 19 | struct pinctrl_gpio_range; |
| 20 | struct pinctrl_map; |
| 21 | struct pinctrl_setting; |
| 22 | |
| 23 | #ifdef CONFIG_PINMUX |
| 24 | |
| 25 | int pinmux_check_ops(struct pinctrl_dev *pctldev); |
| 26 | |
| 27 | int pinmux_validate_map(const struct pinctrl_map *map, int i); |
| 28 | |
| 29 | bool pinmux_can_be_used_for_gpio(struct pinctrl_dev *pctldev, unsigned int pin); |
| 30 | |
| 31 | int pinmux_request_gpio(struct pinctrl_dev *pctldev, |
| 32 | struct pinctrl_gpio_range *range, |
| 33 | unsigned int pin, unsigned int gpio); |
| 34 | void pinmux_free_gpio(struct pinctrl_dev *pctldev, unsigned int pin, |
| 35 | struct pinctrl_gpio_range *range); |
| 36 | int pinmux_gpio_direction(struct pinctrl_dev *pctldev, |
| 37 | struct pinctrl_gpio_range *range, |
| 38 | unsigned int pin, bool input); |
| 39 | |
| 40 | int pinmux_map_to_setting(const struct pinctrl_map *map, |
| 41 | struct pinctrl_setting *setting); |
| 42 | void pinmux_free_setting(const struct pinctrl_setting *setting); |
| 43 | int pinmux_enable_setting(const struct pinctrl_setting *setting); |
| 44 | void pinmux_disable_setting(const struct pinctrl_setting *setting); |
| 45 | |
| 46 | #else |
| 47 | |
| 48 | static inline int pinmux_check_ops(struct pinctrl_dev *pctldev) |
| 49 | { |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static inline int pinmux_validate_map(const struct pinctrl_map *map, int i) |
| 54 | { |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | static inline bool pinmux_can_be_used_for_gpio(struct pinctrl_dev *pctldev, |
| 59 | unsigned int pin) |
| 60 | { |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | static inline int pinmux_request_gpio(struct pinctrl_dev *pctldev, |
| 65 | struct pinctrl_gpio_range *range, |
| 66 | unsigned int pin, unsigned int gpio) |
| 67 | { |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static inline void pinmux_free_gpio(struct pinctrl_dev *pctldev, |
| 72 | unsigned int pin, |
| 73 | struct pinctrl_gpio_range *range) |
| 74 | { |
| 75 | } |
| 76 | |
| 77 | static inline int pinmux_gpio_direction(struct pinctrl_dev *pctldev, |
| 78 | struct pinctrl_gpio_range *range, |
| 79 | unsigned int pin, bool input) |
| 80 | { |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static inline int pinmux_map_to_setting(const struct pinctrl_map *map, |
| 85 | struct pinctrl_setting *setting) |
| 86 | { |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static inline void pinmux_free_setting(const struct pinctrl_setting *setting) |
| 91 | { |
| 92 | } |
| 93 | |
| 94 | static inline int pinmux_enable_setting(const struct pinctrl_setting *setting) |
| 95 | { |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static inline void pinmux_disable_setting(const struct pinctrl_setting *setting) |
| 100 | { |
| 101 | } |
| 102 | |
| 103 | #endif |
| 104 | |
| 105 | #if defined(CONFIG_PINMUX) && defined(CONFIG_DEBUG_FS) |
| 106 | |
| 107 | void pinmux_show_map(struct seq_file *s, const struct pinctrl_map *map); |
| 108 | void pinmux_show_setting(struct seq_file *s, |
| 109 | const struct pinctrl_setting *setting); |
| 110 | void pinmux_init_device_debugfs(struct dentry *devroot, |
| 111 | struct pinctrl_dev *pctldev); |
| 112 | |
| 113 | #else |
| 114 | |
| 115 | static inline void pinmux_show_map(struct seq_file *s, |
| 116 | const struct pinctrl_map *map) |
| 117 | { |
| 118 | } |
| 119 | |
| 120 | static inline void pinmux_show_setting(struct seq_file *s, |
| 121 | const struct pinctrl_setting *setting) |
| 122 | { |
| 123 | } |
| 124 | |
| 125 | static inline void pinmux_init_device_debugfs(struct dentry *devroot, |
| 126 | struct pinctrl_dev *pctldev) |
| 127 | { |
| 128 | } |
| 129 | |
| 130 | #endif |
| 131 | |
| 132 | #ifdef CONFIG_GENERIC_PINMUX_FUNCTIONS |
| 133 | |
| 134 | /** |
| 135 | * struct function_desc - generic function descriptor |
| 136 | * @func: generic data of the pin function (name and groups of pins) |
| 137 | * @data: pin controller driver specific data |
| 138 | */ |
| 139 | struct function_desc { |
| 140 | struct pinfunction func; |
| 141 | void *data; |
| 142 | }; |
| 143 | |
| 144 | /* Convenient macro to define a generic pin function descriptor */ |
| 145 | #define PINCTRL_FUNCTION_DESC(_name, _grps, _num_grps, _data) \ |
| 146 | (struct function_desc) { \ |
| 147 | .func = PINCTRL_PINFUNCTION(_name, _grps, _num_grps), \ |
| 148 | .data = _data, \ |
| 149 | } |
| 150 | |
| 151 | int pinmux_generic_get_function_count(struct pinctrl_dev *pctldev); |
| 152 | |
| 153 | const char * |
| 154 | pinmux_generic_get_function_name(struct pinctrl_dev *pctldev, |
| 155 | unsigned int selector); |
| 156 | |
| 157 | int pinmux_generic_get_function_groups(struct pinctrl_dev *pctldev, |
| 158 | unsigned int selector, |
| 159 | const char * const **groups, |
| 160 | unsigned int * const ngroups); |
| 161 | |
| 162 | struct function_desc *pinmux_generic_get_function(struct pinctrl_dev *pctldev, |
| 163 | unsigned int selector); |
| 164 | |
| 165 | int pinmux_generic_add_function(struct pinctrl_dev *pctldev, |
| 166 | const char *name, |
| 167 | const char * const *groups, |
| 168 | unsigned int const ngroups, |
| 169 | void *data); |
| 170 | |
| 171 | int pinmux_generic_remove_function(struct pinctrl_dev *pctldev, |
| 172 | unsigned int selector); |
| 173 | |
| 174 | void pinmux_generic_free_functions(struct pinctrl_dev *pctldev); |
| 175 | |
| 176 | #else |
| 177 | |
| 178 | static inline void pinmux_generic_free_functions(struct pinctrl_dev *pctldev) |
| 179 | { |
| 180 | } |
| 181 | |
| 182 | #endif /* CONFIG_GENERIC_PINMUX_FUNCTIONS */ |
| 183 | |