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include/syscon.h
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/* * Copyright (c) 2015 Google, Inc * Written by Simon Glass <sjg@chromium.org> * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef __SYSCON_H #define __SYSCON_H #include <fdtdec.h> /** * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS * * @regmap: Register map for this controller */ struct syscon_uc_info { struct regmap *regmap; }; /* So far there are no ops so this is a placeholder */ struct syscon_ops { }; #define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops) #if CONFIG_IS_ENABLED(OF_PLATDATA) /* * We don't support 64-bit machines. If they are so resource-contrained that * they need to use OF_PLATDATA, something is horribly wrong with the * education of our hardware engineers. * * Update: 64-bit is now supported and we have an education crisis. */ struct syscon_base_platdata { fdt_val_t reg[2]; }; #endif /** * syscon_get_regmap() - Get access to a register map * * @dev: Device to check (UCLASS_SCON) * @info: Returns regmap for the device * @return 0 if OK, -ve on error */ struct regmap *syscon_get_regmap(struct udevice *dev); /** * syscon_get_regmap_by_driver_data() - Look up a controller by its ID * * Each system controller can be accessed by its driver data, which is * assumed to be unique through the scope of all system controllers that * are in use. This function looks up the controller given this driver data. * * @driver_data: Driver data value to look up * @devp: Returns the controller correponding to @driver_data * @return 0 on success, -ENODEV if the ID was not found, or other -ve error * code */ int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp); /** * syscon_get_regmap_by_driver_data() - Look up a controller by its ID * * Each system controller can be accessed by its driver data, which is * assumed to be unique through the scope of all system controllers that * are in use. This function looks up the regmap given this driver data. * * @driver_data: Driver data value to look up * @return register map correponding to @driver_data, or -ve error code */ struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data); /** * syscon_get_first_range() - get the first memory range from a syscon regmap * * @driver_data: Driver data value to look up * @return first region of register map correponding to @driver_data, or * -ve error code */ void *syscon_get_first_range(ulong driver_data); #endif |