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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2021, Linaro Limited
* Copyright (c) 2021, Bootlin
*/
#ifndef __DT_DRIVER_H
#define __DT_DRIVER_H
#include <kernel/dt.h>
#include <stdint.h>
#include <sys/queue.h>
/**
* struct dt_driver_phandle_args - Devicetree phandle arguments
* @args_count: Count of cells for the device
* @args: Device consumer specifiers
*/
struct dt_driver_phandle_args {
int args_count;
uint32_t args[];
};
/*
* get_of_device_func - Callback function for returning a driver private
* instance based on a FDT phandle with possible arguments and the
* registered dt_driver private data reference.
*
* @parg: phandle argument(s) referencing the device in the FDT.
* @data: driver private data registered in struct dt_driver.
*
* Return a device opaque reference, e.g. a struct clk pointer for a clock
* driver, or NULL if not found.
*/
typedef void *(*get_of_device_func)(struct dt_driver_phandle_args *parg,
void *data);
/*
* struct dt_driver_provider - DT related info on probed device
*
* Saves information on the probed device so that device
* drivers can get resources from DT phandle and related arguments.
*
* @nodeoffset: Node offset of device referenced in the FDT
* @type: One of DT_DRIVER_* or DT_DRIVER_NOTYPE.
* @provider_cells: Cells count in the FDT used by the driver's references
* @get_of_device: Function to get driver's device ref from phandle data
* @priv_data: Driver private data passed as @get_of_device argument
* @link: Reference in DT driver providers list
*/
struct dt_driver_provider {
int nodeoffset;
enum dt_driver_type type;
unsigned int provider_cells;
uint32_t phandle;
get_of_device_func get_of_device;
void *priv_data;
SLIST_ENTRY(dt_driver_provider) link;
};
SLIST_HEAD(dt_driver_prov_list, dt_driver_provider);
extern struct dt_driver_prov_list dt_driver_provider_list;
#endif /* __DT_DRIVER_H */
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