mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 20:54:31 +00:00
04ecf36ba6
Provide a new function which can cope with obtaining information from of-platdata instead of the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __SYSCON_H
|
|
#define __SYSCON_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.
|
|
*/
|
|
struct syscon_base_platdata {
|
|
u32 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
|