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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* fdt_driver.h - Generic support for initializing drivers from DT nodes.
*
* Copyright (c) 2024 SiFive
*/
#ifndef __FDT_DRIVER_H__
#define __FDT_DRIVER_H__
#include <sbi_utils/fdt/fdt_helper.h>
struct fdt_driver {
const struct fdt_match *match_table;
int (*init)(const void *fdt, int nodeoff,
const struct fdt_match *match);
bool experimental;
};
/* List of early FDT drivers generated at compile time */
extern const struct fdt_driver *const fdt_early_drivers[];
/**
* Initialize a driver instance for a specific DT node
*
* @param fdt devicetree blob
* @param nodeoff offset of a node in the devicetree blob
* @param drivers NULL-terminated array of drivers to match against this node
*
* @return 0 if a driver was matched and successfully initialized or a negative
* error code on failure
*/
int fdt_driver_init_by_offset(const void *fdt, int nodeoff,
const struct fdt_driver *const *drivers);
/**
* Initialize a driver instance for each DT node that matches any of the
* provided drivers
*
* @param fdt devicetree blob
* @param drivers NULL-terminated array of drivers to match against each node
*
* @return 0 if drivers for all matches (if any) were successfully initialized
* or a negative error code on failure
*/
int fdt_driver_init_all(const void *fdt,
const struct fdt_driver *const *drivers);
/**
* Initialize a driver instance for the first DT node that matches any of the
* provided drivers
*
* @param fdt devicetree blob
* @param drivers NULL-terminated array of drivers to match against each node
*
* @return 0 if a driver was matched and successfully initialized or a negative
* error code on failure
*/
int fdt_driver_init_one(const void *fdt,
const struct fdt_driver *const *drivers);
#endif /* __FDT_DRIVER_H__ */
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