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