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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
*/
#ifndef _DM_ROOT_H_
#define _DM_ROOT_H_
struct udevice;
/* Head of the uclass list if CONFIG_OF_PLATDATA_INST is enabled */
extern struct list_head uclass_head;
/**
* dm_root() - Return pointer to the top of the driver tree
*
* This function returns pointer to the root node of the driver tree,
*
* Return: pointer to root device, or NULL if not inited yet
*/
struct udevice *dm_root(void);
struct global_data;
/**
* dm_fixup_for_gd_move() - Handle global_data moving to a new place
*
* @new_gd: Pointer to the new global data
*
* The uclass list is part of global_data. Due to the way lists work, moving
* the list will cause it to become invalid. This function fixes that up so
* that the uclass list will work correctly.
*/
void dm_fixup_for_gd_move(struct global_data *new_gd);
/**
* dm_scan_plat() - Scan all platform data and bind drivers
*
* This scans all available plat and creates drivers for each
*
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
* flag. If false bind all drivers.
* Return: 0 if OK, -ve on error
*/
int dm_scan_plat(bool pre_reloc_only);
/**
* dm_scan_fdt() - Scan the device tree and bind drivers
*
* This scans the device tree and creates a driver for each node. Only
* the top-level subnodes are examined.
*
* @pre_reloc_only: If true, bind only nodes with special devicetree properties,
* or drivers with the DM_FLAG_PRE_RELOC flag. If false bind all drivers.
* Return: 0 if OK, -ve on error
*/
int dm_scan_fdt(bool pre_reloc_only);
/**
* dm_extended_scan() - Scan the device tree and bind drivers
*
* This calls dm_scna_dft() which scans the device tree and creates a driver
* for each node. the top-level subnodes are examined and also all sub-nodes
* of "clocks" node.
*
* @pre_reloc_only: If true, bind only nodes with special devicetree properties,
* or drivers with the DM_FLAG_PRE_RELOC flag. If false bind all drivers.
* Return: 0 if OK, -ve on error
*/
int dm_extended_scan(bool pre_reloc_only);
/**
* dm_scan_other() - Scan for other devices
*
* Some devices may not be visible to Driver Model. This weak function can
* be provided by boards which wish to create their own devices
* programmaticaly. They should do this by calling device_bind() on each
* device.
*
* @pre_reloc_only: If true, bind only nodes with special devicetree properties,
* or drivers with the DM_FLAG_PRE_RELOC flag. If false bind all drivers.
* Return: 0 if OK, -ve on error
*/
int dm_scan_other(bool pre_reloc_only);
/**
* dm_init_and_scan() - Initialise Driver Model structures and scan for devices
*
* This function initialises the roots of the driver tree and uclass trees,
* then scans and binds available devices from platform data and the FDT.
* This calls dm_init() to set up Driver Model structures.
*
* @pre_reloc_only: If true, bind only nodes with special devicetree properties,
* or drivers with the DM_FLAG_PRE_RELOC flag. If false bind all drivers.
* Return: 0 if OK, -ve on error
*/
int dm_init_and_scan(bool pre_reloc_only);
/**
* dm_init() - Initialise Driver Model structures
*
* This function will initialize roots of driver tree and class tree.
* This needs to be called before anything uses the DM
*
* @of_live: Enable live device tree
* Return: 0 if OK, -ve on error
*/
int dm_init(bool of_live);
/**
* dm_uninit - Uninitialise Driver Model structures
*
* All devices will be removed and unbound
* Return: 0 if OK, -ve on error
*/
int dm_uninit(void);
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
/**
* dm_remove_devices_flags - Call remove function of all drivers with
* specific removal flags set to selectively
* remove drivers
*
* All devices with the matching flags set will be removed
*
* @flags: Flags for selective device removal
* Return: 0 if OK, -ve on error
*/
int dm_remove_devices_flags(uint flags);
#else
static inline int dm_remove_devices_flags(uint flags) { return 0; }
#endif
/**
* dm_get_stats() - Get some stats for driver mode
*
* @device_countp: Returns total number of devices that are bound
* @uclass_countp: Returns total number of uclasses in use
*/
void dm_get_stats(int *device_countp, int *uclass_countp);
#endif
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