157251285SSimon Glass /* 257251285SSimon Glass * Copyright (c) 2015 Google, Inc 357251285SSimon Glass * Written by Simon Glass <sjg@chromium.org> 457251285SSimon Glass * 557251285SSimon Glass * SPDX-License-Identifier: GPL-2.0+ 657251285SSimon Glass */ 757251285SSimon Glass 857251285SSimon Glass #ifndef __SYSCON_H 957251285SSimon Glass #define __SYSCON_H 1057251285SSimon Glass 1157251285SSimon Glass /** 1257251285SSimon Glass * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS 1357251285SSimon Glass * 1457251285SSimon Glass * @regmap: Register map for this controller 1557251285SSimon Glass */ 1657251285SSimon Glass struct syscon_uc_info { 1757251285SSimon Glass struct regmap *regmap; 1857251285SSimon Glass }; 1957251285SSimon Glass 2057251285SSimon Glass /* So far there are no ops so this is a placeholder */ 2157251285SSimon Glass struct syscon_ops { 2257251285SSimon Glass }; 2357251285SSimon Glass 2457251285SSimon Glass #define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops) 2557251285SSimon Glass 26*04ecf36bSSimon Glass #if CONFIG_IS_ENABLED(OF_PLATDATA) 27*04ecf36bSSimon Glass /* 28*04ecf36bSSimon Glass * We don't support 64-bit machines. If they are so resource-contrained that 29*04ecf36bSSimon Glass * they need to use OF_PLATDATA, something is horribly wrong with the 30*04ecf36bSSimon Glass * education of our hardware engineers. 31*04ecf36bSSimon Glass */ 32*04ecf36bSSimon Glass struct syscon_base_platdata { 33*04ecf36bSSimon Glass u32 reg[2]; 34*04ecf36bSSimon Glass }; 35*04ecf36bSSimon Glass #endif 36*04ecf36bSSimon Glass 3757251285SSimon Glass /** 3857251285SSimon Glass * syscon_get_regmap() - Get access to a register map 3957251285SSimon Glass * 4057251285SSimon Glass * @dev: Device to check (UCLASS_SCON) 4157251285SSimon Glass * @info: Returns regmap for the device 4257251285SSimon Glass * @return 0 if OK, -ve on error 4357251285SSimon Glass */ 4457251285SSimon Glass struct regmap *syscon_get_regmap(struct udevice *dev); 4557251285SSimon Glass 4657251285SSimon Glass /** 4757251285SSimon Glass * syscon_get_regmap_by_driver_data() - Look up a controller by its ID 4857251285SSimon Glass * 4957251285SSimon Glass * Each system controller can be accessed by its driver data, which is 5057251285SSimon Glass * assumed to be unique through the scope of all system controllers that 51ac94b7bcSSimon Glass * are in use. This function looks up the controller given this driver data. 52ac94b7bcSSimon Glass * 53ac94b7bcSSimon Glass * @driver_data: Driver data value to look up 54ac94b7bcSSimon Glass * @devp: Returns the controller correponding to @driver_data 55ac94b7bcSSimon Glass * @return 0 on success, -ENODEV if the ID was not found, or other -ve error 56ac94b7bcSSimon Glass * code 57ac94b7bcSSimon Glass */ 58ac94b7bcSSimon Glass int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp); 59ac94b7bcSSimon Glass 60ac94b7bcSSimon Glass /** 61ac94b7bcSSimon Glass * syscon_get_regmap_by_driver_data() - Look up a controller by its ID 62ac94b7bcSSimon Glass * 63ac94b7bcSSimon Glass * Each system controller can be accessed by its driver data, which is 64ac94b7bcSSimon Glass * assumed to be unique through the scope of all system controllers that 6557251285SSimon Glass * are in use. This function looks up the regmap given this driver data. 6657251285SSimon Glass * 6757251285SSimon Glass * @driver_data: Driver data value to look up 6857251285SSimon Glass * @return register map correponding to @driver_data, or -ve error code 6957251285SSimon Glass */ 7057251285SSimon Glass struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data); 7157251285SSimon Glass 7257251285SSimon Glass /** 7357251285SSimon Glass * syscon_get_first_range() - get the first memory range from a syscon regmap 7457251285SSimon Glass * 7557251285SSimon Glass * @driver_data: Driver data value to look up 7657251285SSimon Glass * @return first region of register map correponding to @driver_data, or 7757251285SSimon Glass * -ve error code 7857251285SSimon Glass */ 7957251285SSimon Glass void *syscon_get_first_range(ulong driver_data); 8057251285SSimon Glass 8157251285SSimon Glass #endif 82