1 /* 2 * Machine interface for the pinctrl subsystem. 3 * 4 * Copyright (C) 2011 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 <[email protected]> 9 * 10 * License terms: GNU General Public License (GPL) version 2 11 */ 12 #ifndef __LINUX_PINCTRL_MACHINE_H 13 #define __LINUX_PINCTRL_MACHINE_H 14 15 /** 16 * struct pinctrl_map - boards/machines shall provide this map for devices 17 * @name: the name of this specific map entry for the particular machine. 18 * This is the second parameter passed to pinmux_get() when you want 19 * to have several mappings to the same device 20 * @ctrl_dev_name: the name of the device controlling this specific mapping, 21 * the name must be the same as in your struct device* 22 * @function: a function in the driver to use for this mapping, the driver 23 * will lookup the function referenced by this ID on the specified 24 * pin control device 25 * @group: sometimes a function can map to different pin groups, so this 26 * selects a certain specific pin group to activate for the function, if 27 * left as NULL, the first applicable group will be used 28 * @dev_name: the name of the device using this specific mapping, the name 29 * must be the same as in your struct device*. If this name is set to the 30 * same name as the pin controllers own dev_name(), the map entry will be 31 * hogged by the driver itself upon registration 32 */ 33 struct pinctrl_map { 34 const char *name; 35 const char *ctrl_dev_name; 36 const char *function; 37 const char *group; 38 const char *dev_name; 39 }; 40 41 /* 42 * Convenience macro to set a simple map from a certain pin controller and a 43 * certain function to a named device 44 */ 45 #define PIN_MAP(a, b, c, d) \ 46 { .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d } 47 48 /* 49 * Convenience macro to map a system function onto a certain pinctrl device. 50 * System functions are not assigned to a particular device. 51 */ 52 #define PIN_MAP_SYS(a, b, c) \ 53 { .name = a, .ctrl_dev_name = b, .function = c } 54 55 /* 56 * Convenience macro to map a system function onto a certain pinctrl device, 57 * to be hogged by the pin control core until the system shuts down. 58 */ 59 #define PIN_MAP_SYS_HOG(a, b, c) \ 60 { .name = a, .ctrl_dev_name = b, .dev_name = b, .function = c, } 61 62 /* 63 * Convenience macro to map a system function onto a certain pinctrl device 64 * using a specified group, to be hogged by the pin control core until the 65 * system shuts down. 66 */ 67 #define PIN_MAP_SYS_HOG_GROUP(a, b, c, d) \ 68 { .name = a, .ctrl_dev_name = b, .dev_name = b, .function = c, \ 69 .group = d, } 70 71 #ifdef CONFIG_PINMUX 72 73 extern int pinctrl_register_mappings(struct pinctrl_map const *map, 74 unsigned num_maps); 75 76 #else 77 78 static inline int pinctrl_register_mappings(struct pinctrl_map const *map, 79 unsigned num_maps) 80 { 81 return 0; 82 } 83 84 #endif /* !CONFIG_PINMUX */ 85 #endif 86