mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 07:28:51 +09:00
![Jean-Jacques Hiblot](/assets/img/avatar_default.png)
syscon_regmap_lookup_by_phandle() can be used to get the regmap of a syscon device from a reference in the DTS. It operates similarly to the linux version of the namesake function. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#ifndef __SYSCON_H
|
|
#define __SYSCON_H
|
|
|
|
#include <dm/ofnode.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_regmap_lookup_by_phandle() - Look up a controller by a phandle
|
|
*
|
|
* This operates by looking up the given name in the device (device
|
|
* tree property) of the device using the system controller.
|
|
*
|
|
* @dev: Device using the system controller
|
|
* @name: Name of property referring to the system controller
|
|
* @return A pointer to the regmap if found, ERR_PTR(-ve) on error
|
|
*/
|
|
struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
|
|
const char *name);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* syscon_node_to_regmap - get regmap from syscon
|
|
*
|
|
* @node: Device node of syscon
|
|
*/
|
|
struct regmap *syscon_node_to_regmap(ofnode node);
|
|
|
|
#endif
|