mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 07:34:31 +00:00
5725128507
Many SoCs have a number of system controllers which are dealt with as a group by a single driver. It is a pain to have to add lots of compatible strings and/or separate drivers for each. Instead we can identify the controllers by a number and request the address of the one we want. Add a simple implementation of this which can be used by SoC driver code. Signed-off-by: Simon Glass <sjg@chromium.org>
56 lines
1.5 KiB
C
56 lines
1.5 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)
|
|
|
|
/**
|
|
* 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 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
|