include/dm/uclass-internal.h - filogic/uboot - Gitiles

 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2013 Google, Inc
  *
  * (C) Copyright 2012
  * Pavel Herrmann <morpheus.ibis@gmail.com>
  */

 #ifndef _DM_UCLASS_INTERNAL_H
 #define _DM_UCLASS_INTERNAL_H

 #include <dm/ofnode.h>

 /**
  * uclass_find_next_free_req_seq() - Get the next free req_seq number
  *
  * This returns the next free req_seq number. This is useful only if
  * OF_CONTROL is not used. The next free req_seq number is simply the
  * maximum req_seq of the uclass + 1.
  * This allows assiging req_seq number in the binding order.
  *
  * @uc:		uclass to check
  * @return	The next free req_seq number
  */
 int uclass_find_next_free_req_seq(struct uclass *uc);

 /**
  * uclass_get_device_tail() - handle the end of a get_device call
  *
  * This handles returning an error or probing a device as needed.
  *
  * @dev: Device that needs to be probed
  * @ret: Error to return. If non-zero then the device is not probed
  * @devp: Returns the value of 'dev' if there is no error
  * @return ret, if non-zero, else the result of the device_probe() call
  */
 int uclass_get_device_tail(struct udevice *dev, int ret, struct udevice **devp);

 /**
  * dev_get_uclass_index() - Get uclass and index of device
  * @dev:	- in - Device that we want the uclass/index of
  * @ucp:	- out - A pointer to the uclass the device belongs to
  *
  * The device is not prepared for use - this is an internal function.
  *
  * @return the index of the device in the uclass list or -ENODEV if not found.
  */
 int dev_get_uclass_index(struct udevice *dev, struct uclass **ucp);

 /**
  * uclass_find_device() - Return n-th child of uclass
  * @id:		Id number of the uclass
  * @index:	Position of the child in uclass's list
  * #devp:	Returns pointer to device, or NULL on error
  *
  * The device is not prepared for use - this is an internal function.
  * The function uclass_get_device_tail() can be used to probe the device.
  *
  * @return the uclass pointer of a child at the given index or
  * return NULL on error.
  */
 int uclass_find_device(enum uclass_id id, int index, struct udevice **devp);

 /**
  * uclass_find_first_device() - Return the first device in a uclass
  * @id:		Id number of the uclass
  * #devp:	Returns pointer to device, or NULL on error
  *
  * The device is not prepared for use - this is an internal function.
  * The function uclass_get_device_tail() can be used to probe the device.
  *
  * @return 0 if OK (found or not found), -ve on error
  */
 int uclass_find_first_device(enum uclass_id id, struct udevice **devp);

 /**
  * uclass_find_next_device() - Return the next device in a uclass
  * @devp: On entry, pointer to device to lookup. On exit, returns pointer
  * to the next device in the same uclass, or NULL if none
  *
  * The device is not prepared for use - this is an internal function.
  * The function uclass_get_device_tail() can be used to probe the device.
  *
  * @return 0 if OK (found or not found), -ve on error
  */
 int uclass_find_next_device(struct udevice **devp);

 /**
  * uclass_find_device_by_name() - Find uclass device based on ID and name
  *
  * This searches for a device with the exactly given name.
  *
  * The device is NOT probed, it is merely returned.
  *
  * @id: ID to look up
  * @name: name of a device to find
  * @devp: Returns pointer to device (the first one with the name)
  * @return 0 if OK, -ve on error
  */
 int uclass_find_device_by_name(enum uclass_id id, const char *name,
 			       struct udevice **devp);

 /**
  * uclass_find_device_by_seq() - Find uclass device based on ID and sequence
  *
  * This searches for a device with the given seq or req_seq.
  *
  * For seq, if an active device has this sequence it will be returned.
  * If there is no such device then this will return -ENODEV.
  *
  * For req_seq, if a device (whether activated or not) has this req_seq
  * value, that device will be returned. This is a strong indication that
  * the device will receive that sequence when activated.
  *
  * The device is NOT probed, it is merely returned.
  *
  * @id: ID to look up
  * @seq_or_req_seq: Sequence number to find (0=first)
  * @find_req_seq: true to find req_seq, false to find seq
  * @devp: Returns pointer to device (there is only one per for each seq)
  * @return 0 if OK, -ve on error
  */
 int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
 			      bool find_req_seq, struct udevice **devp);

 /**
  * uclass_find_device_by_of_offset() - Find a uclass device by device tree node
  *
  * This searches the devices in the uclass for one attached to the given
  * device tree node.
  *
  * The device is NOT probed, it is merely returned.
  *
  * @id: ID to look up
  * @node: Device tree offset to search for (if -ve then -ENODEV is returned)
  * @devp: Returns pointer to device (there is only one for each node)
  * @return 0 if OK, -ve on error
  */
 int uclass_find_device_by_of_offset(enum uclass_id id, int node,
 				    struct udevice **devp);

 /**
  * uclass_find_device_by_of_node() - Find a uclass device by device tree node
  *
  * This searches the devices in the uclass for one attached to the given
  * device tree node.
  *
  * The device is NOT probed, it is merely returned.
  *
  * @id: ID to look up
  * @node: Device tree offset to search for (if NULL then -ENODEV is returned)
  * @devp: Returns pointer to device (there is only one for each node)
  * @return 0 if OK, -ve on error
  */
 int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
 				 struct udevice **devp);

 /**
  * uclass_find_device_by_phandle() - Find a uclass device by phandle
  *
  * This searches the devices in the uclass for one with the given phandle.
  *
  * The device is NOT probed, it is merely returned.
  *
  * @id: ID to look up
  * @parent: Parent device containing the phandle pointer
  * @name: Name of property in the parent device node
  * @devp: Returns pointer to device (there is only one for each node)
  * @return 0 if OK, -ENOENT if there is no @name present in the node, other
  *	-ve on error
  */
 int uclass_find_device_by_phandle(enum uclass_id id, struct udevice *parent,
 				  const char *name, struct udevice **devp);

 /**
  * uclass_bind_device() - Associate device with a uclass
  *
  * Connect the device into uclass's list of devices.
  *
  * @dev:	Pointer to the device
  * #return 0 on success, -ve on error
  */
 int uclass_bind_device(struct udevice *dev);

 /**
  * uclass_unbind_device() - Deassociate device with a uclass
  *
  * Disconnect the device from uclass's list of devices.
  *
  * @dev:	Pointer to the device
  * #return 0 on success, -ve on error
  */
 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
 int uclass_unbind_device(struct udevice *dev);
 #else
 static inline int uclass_unbind_device(struct udevice *dev) { return 0; }
 #endif

 /**
  * uclass_pre_probe_device() - Deal with a device that is about to be probed
  *
  * Perform any pre-processing that is needed by the uclass before it can be
  * probed. This includes the uclass' pre-probe() method and the parent
  * uclass' child_pre_probe() method.
  *
  * @dev:	Pointer to the device
  * #return 0 on success, -ve on error
  */
 int uclass_pre_probe_device(struct udevice *dev);

 /**
  * uclass_post_probe_device() - Deal with a device that has just been probed
  *
  * Perform any post-processing of a probed device that is needed by the
  * uclass.
  *
  * @dev:	Pointer to the device
  * #return 0 on success, -ve on error
  */
 int uclass_post_probe_device(struct udevice *dev);

 /**
  * uclass_pre_remove_device() - Handle a device which is about to be removed
  *
  * Perform any pre-processing of a device that is about to be removed.
  *
  * @dev:	Pointer to the device
  * #return 0 on success, -ve on error
  */
 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
 int uclass_pre_remove_device(struct udevice *dev);
 #else
 static inline int uclass_pre_remove_device(struct udevice *dev) { return 0; }
 #endif

 /**
  * uclass_find() - Find uclass by its id
  *
  * @id:		Id to serach for
  * @return pointer to uclass, or NULL if not found
  */
 struct uclass *uclass_find(enum uclass_id key);

 /**
  * uclass_destroy() - Destroy a uclass
  *
  * Destroy a uclass and all its devices
  *
  * @uc: uclass to destroy
  * @return 0 on success, -ve on error
  */
 int uclass_destroy(struct uclass *uc);

 #endif
	/* SPDX-License-Identifier: GPL-2.0+ */
	/*
	* Copyright (c) 2013 Google, Inc
	*
	* (C) Copyright 2012
	* Pavel Herrmann <morpheus.ibis@gmail.com>
	*/

	#ifndef _DM_UCLASS_INTERNAL_H
	#define _DM_UCLASS_INTERNAL_H

	#include <dm/ofnode.h>

	/**
	* uclass_find_next_free_req_seq() - Get the next free req_seq number
	*
	* This returns the next free req_seq number. This is useful only if
	* OF_CONTROL is not used. The next free req_seq number is simply the
	* maximum req_seq of the uclass + 1.
	* This allows assiging req_seq number in the binding order.
	*
	* @uc: uclass to check
	* @return The next free req_seq number
	*/
	int uclass_find_next_free_req_seq(struct uclass *uc);

	/**
	* uclass_get_device_tail() - handle the end of a get_device call
	*
	* This handles returning an error or probing a device as needed.
	*
	* @dev: Device that needs to be probed
	* @ret: Error to return. If non-zero then the device is not probed
	* @devp: Returns the value of 'dev' if there is no error
	* @return ret, if non-zero, else the result of the device_probe() call
	*/
	int uclass_get_device_tail(struct udevice dev, int ret, struct udevice *devp);

	/**
	* dev_get_uclass_index() - Get uclass and index of device
	* @dev: - in - Device that we want the uclass/index of
	* @ucp: - out - A pointer to the uclass the device belongs to
	*
	* The device is not prepared for use - this is an internal function.
	*
	* @return the index of the device in the uclass list or -ENODEV if not found.
	*/
	int dev_get_uclass_index(struct udevice dev, struct uclass *ucp);

	/**
	* uclass_find_device() - Return n-th child of uclass
	* @id: Id number of the uclass
	* @index: Position of the child in uclass's list
	* #devp: Returns pointer to device, or NULL on error
	*
	* The device is not prepared for use - this is an internal function.
	* The function uclass_get_device_tail() can be used to probe the device.
	*
	* @return the uclass pointer of a child at the given index or
	* return NULL on error.
	*/
	int uclass_find_device(enum uclass_id id, int index, struct udevice **devp);

	/**
	* uclass_find_first_device() - Return the first device in a uclass
	* @id: Id number of the uclass
	* #devp: Returns pointer to device, or NULL on error
	*
	* The device is not prepared for use - this is an internal function.
	* The function uclass_get_device_tail() can be used to probe the device.
	*
	* @return 0 if OK (found or not found), -ve on error
	*/
	int uclass_find_first_device(enum uclass_id id, struct udevice **devp);

	/**
	* uclass_find_next_device() - Return the next device in a uclass
	* @devp: On entry, pointer to device to lookup. On exit, returns pointer
	* to the next device in the same uclass, or NULL if none
	*
	* The device is not prepared for use - this is an internal function.
	* The function uclass_get_device_tail() can be used to probe the device.
	*
	* @return 0 if OK (found or not found), -ve on error
	*/
	int uclass_find_next_device(struct udevice **devp);

	/**
	* uclass_find_device_by_name() - Find uclass device based on ID and name
	*
	* This searches for a device with the exactly given name.
	*
	* The device is NOT probed, it is merely returned.
	*
	* @id: ID to look up
	* @name: name of a device to find
	* @devp: Returns pointer to device (the first one with the name)
	* @return 0 if OK, -ve on error
	*/
	int uclass_find_device_by_name(enum uclass_id id, const char *name,
	struct udevice **devp);

	/**
	* uclass_find_device_by_seq() - Find uclass device based on ID and sequence
	*
	* This searches for a device with the given seq or req_seq.
	*
	* For seq, if an active device has this sequence it will be returned.
	* If there is no such device then this will return -ENODEV.
	*
	* For req_seq, if a device (whether activated or not) has this req_seq
	* value, that device will be returned. This is a strong indication that
	* the device will receive that sequence when activated.
	*
	* The device is NOT probed, it is merely returned.
	*
	* @id: ID to look up
	* @seq_or_req_seq: Sequence number to find (0=first)
	* @find_req_seq: true to find req_seq, false to find seq
	* @devp: Returns pointer to device (there is only one per for each seq)
	* @return 0 if OK, -ve on error
	*/
	int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
	bool find_req_seq, struct udevice **devp);

	/**
	* uclass_find_device_by_of_offset() - Find a uclass device by device tree node
	*
	* This searches the devices in the uclass for one attached to the given
	* device tree node.
	*
	* The device is NOT probed, it is merely returned.
	*
	* @id: ID to look up
	* @node: Device tree offset to search for (if -ve then -ENODEV is returned)
	* @devp: Returns pointer to device (there is only one for each node)
	* @return 0 if OK, -ve on error
	*/
	int uclass_find_device_by_of_offset(enum uclass_id id, int node,
	struct udevice **devp);

	/**
	* uclass_find_device_by_of_node() - Find a uclass device by device tree node
	*
	* This searches the devices in the uclass for one attached to the given
	* device tree node.
	*
	* The device is NOT probed, it is merely returned.
	*
	* @id: ID to look up
	* @node: Device tree offset to search for (if NULL then -ENODEV is returned)
	* @devp: Returns pointer to device (there is only one for each node)
	* @return 0 if OK, -ve on error
	*/
	int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
	struct udevice **devp);

	/**
	* uclass_find_device_by_phandle() - Find a uclass device by phandle
	*
	* This searches the devices in the uclass for one with the given phandle.
	*
	* The device is NOT probed, it is merely returned.
	*
	* @id: ID to look up
	* @parent: Parent device containing the phandle pointer
	* @name: Name of property in the parent device node
	* @devp: Returns pointer to device (there is only one for each node)
	* @return 0 if OK, -ENOENT if there is no @name present in the node, other
	* -ve on error
	*/
	int uclass_find_device_by_phandle(enum uclass_id id, struct udevice *parent,
	const char name, struct udevice *devp);

	/**
	* uclass_bind_device() - Associate device with a uclass
	*
	* Connect the device into uclass's list of devices.
	*
	* @dev: Pointer to the device
	* #return 0 on success, -ve on error
	*/
	int uclass_bind_device(struct udevice *dev);

	/**
	* uclass_unbind_device() - Deassociate device with a uclass
	*
	* Disconnect the device from uclass's list of devices.
	*
	* @dev: Pointer to the device
	* #return 0 on success, -ve on error
	*/
	#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
	int uclass_unbind_device(struct udevice *dev);
	#else
	static inline int uclass_unbind_device(struct udevice *dev) { return 0; }
	#endif

	/**
	* uclass_pre_probe_device() - Deal with a device that is about to be probed
	*
	* Perform any pre-processing that is needed by the uclass before it can be
	* probed. This includes the uclass' pre-probe() method and the parent
	* uclass' child_pre_probe() method.
	*
	* @dev: Pointer to the device
	* #return 0 on success, -ve on error
	*/
	int uclass_pre_probe_device(struct udevice *dev);

	/**
	* uclass_post_probe_device() - Deal with a device that has just been probed
	*
	* Perform any post-processing of a probed device that is needed by the
	* uclass.
	*
	* @dev: Pointer to the device
	* #return 0 on success, -ve on error
	*/
	int uclass_post_probe_device(struct udevice *dev);

	/**
	* uclass_pre_remove_device() - Handle a device which is about to be removed
	*
	* Perform any pre-processing of a device that is about to be removed.
	*
	* @dev: Pointer to the device
	* #return 0 on success, -ve on error
	*/
	#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
	int uclass_pre_remove_device(struct udevice *dev);
	#else
	static inline int uclass_pre_remove_device(struct udevice *dev) { return 0; }
	#endif

	/**
	* uclass_find() - Find uclass by its id
	*
	* @id: Id to serach for
	* @return pointer to uclass, or NULL if not found
	*/
	struct uclass *uclass_find(enum uclass_id key);

	/**
	* uclass_destroy() - Destroy a uclass
	*
	* Destroy a uclass and all its devices
	*
	* @uc: uclass to destroy
	* @return 0 on success, -ve on error
	*/
	int uclass_destroy(struct uclass *uc);

	#endif