1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __SYSCON_H 9 #define __SYSCON_H 10 11 /** 12 * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS 13 * 14 * @regmap: Register map for this controller 15 */ 16 struct syscon_uc_info { 17 struct regmap *regmap; 18 }; 19 20 /* So far there are no ops so this is a placeholder */ 21 struct syscon_ops { 22 }; 23 24 #define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops) 25 26 /** 27 * syscon_get_regmap() - Get access to a register map 28 * 29 * @dev: Device to check (UCLASS_SCON) 30 * @info: Returns regmap for the device 31 * @return 0 if OK, -ve on error 32 */ 33 struct regmap *syscon_get_regmap(struct udevice *dev); 34 35 /** 36 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID 37 * 38 * Each system controller can be accessed by its driver data, which is 39 * assumed to be unique through the scope of all system controllers that 40 * are in use. This function looks up the controller given this driver data. 41 * 42 * @driver_data: Driver data value to look up 43 * @devp: Returns the controller correponding to @driver_data 44 * @return 0 on success, -ENODEV if the ID was not found, or other -ve error 45 * code 46 */ 47 int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp); 48 49 /** 50 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID 51 * 52 * Each system controller can be accessed by its driver data, which is 53 * assumed to be unique through the scope of all system controllers that 54 * are in use. This function looks up the regmap given this driver data. 55 * 56 * @driver_data: Driver data value to look up 57 * @return register map correponding to @driver_data, or -ve error code 58 */ 59 struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data); 60 61 /** 62 * syscon_get_first_range() - get the first memory range from a syscon regmap 63 * 64 * @driver_data: Driver data value to look up 65 * @return first region of register map correponding to @driver_data, or 66 * -ve error code 67 */ 68 void *syscon_get_first_range(ulong driver_data); 69 70 #endif 71