111 lines
2.2 KiB
C
111 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2021 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#ifndef _DM_TAG_H
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#define _DM_TAG_H
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#include <linux/list.h>
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#include <linux/types.h>
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struct udevice;
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enum dm_tag_t {
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/* EFI_LOADER */
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DM_TAG_EFI = 0,
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DM_TAG_COUNT,
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};
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/**
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* dmtag_node
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*
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* @sibling: List of dm-tag nodes
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* @dev: Associated udevice
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* @tag: Tag type
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* @ptr: Pointer as a value
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* @val: Value
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*/
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struct dmtag_node {
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struct list_head sibling;
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struct udevice *dev;
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enum dm_tag_t tag;
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union {
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void *ptr;
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ulong val;
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};
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};
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/**
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* dev_tag_set_ptr() - set a tag's value as a pointer
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* @dev: Device to operate
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* @tag: Tag type
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* @ptr: Pointer to set
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*
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* Set the value, @ptr, as of @tag associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_set_ptr(struct udevice *dev, enum dm_tag_t tag, void *ptr);
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/**
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* dev_tag_set_val() set a tag's value as an integer
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* @dev: Device to operate
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* @tag: Tag type
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* @val: Value to set
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*
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* Set the value, @val, as of @tag associated with the device, @dev
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*
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* Return: on success, -ve on error
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*/
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int dev_tag_set_val(struct udevice *dev, enum dm_tag_t tag, ulong val);
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/**
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* dev_tag_get_ptr() - get a tag's value as a pointer
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* @dev: Device to operate
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* @tag: Tag type
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* @ptrp: Pointer to tag's value (pointer)
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*
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* Get a tag's value as a pointer
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*
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* Return: on success, -ve on error
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*/
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int dev_tag_get_ptr(struct udevice *dev, enum dm_tag_t tag, void **ptrp);
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/**
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* dev_tag_get_val() - get a tag's value as an integer
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* @dev: Device to operate
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* @tag: Tag type
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* @valp: Pointer to tag's value (ulong)
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*
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* Get a tag's value as an integer
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_get_val(struct udevice *dev, enum dm_tag_t tag, ulong *valp);
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/**
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* dev_tag_del() - delete a tag
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* @dev: Device to operate
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* @tag: Tag type
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*
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* Delete a tag of @tag associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_del(struct udevice *dev, enum dm_tag_t tag);
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/**
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* dev_tag_del_all() - delete all tags
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* @dev: Device to operate
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*
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* Delete all the tags associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_del_all(struct udevice *dev);
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#endif /* _DM_TAG_H */
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