u-boot/include/syscon.h
Johan Jonker 0fbb96964b core: remap: fix regmap_init_mem_plat() reg size handeling
The fdt_addr_t and phys_addr_t size have been decoupled.
A 32bit CPU can expect 64-bit data from the device tree parser,
so convert regmap_init_mem_plat() input to handel both. The
syscon class driver also makes use of the regmap_init_mem_plat()
function, but has no way of knowing the format of the
device-specific platform data. In case of odd reg structures other
then that the syscon class driver assumes the regmap must be
filled in the individual syscon driver before pre-probe.
Also fix the ARRAY_SIZE divider in the syscon class driver.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-05-06 17:28:18 +08:00

92 lines
2.7 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)
/**
* 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