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f9b139342c
The extension_overlay_cmd environment variable approach is specific to the U-Boot extension_board command, while other boot flows (pxe_utils, bootstd) handle overlay loading differently. Move the extension_overlay_cmd execution out of the core extension framework to the command level. This decouples the framework from command-specific behavior and prepares for future extension support in other boot flows. Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com> Reviewed-by: Simon Glass <sjg@chromium.org>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2021
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* Köry Maincent, Bootlin, <kory.maincent@bootlin.com>
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*/
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#ifndef __EXTENSION_SUPPORT_H
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#define __EXTENSION_SUPPORT_H
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#include <alist.h>
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#include <dm/device.h>
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#include <linux/list.h>
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#include <dm/platdata.h>
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extern struct list_head extension_list;
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/**
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* extension_get_list - Get the extension list
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* Return: The extension alist pointer, or NULL if no such list exists.
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*
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* The caller must not free the list.
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*/
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struct alist *extension_get_list(void);
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/**
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* extension_probe - Probe extension device
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* @dev: Extension device that needs to be probed
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* Return: Zero on success, negative on failure.
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*/
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int extension_probe(struct udevice *dev);
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/**
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* extension_remove - Remove extension device
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* @dev: Extension device that needs to be removed
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* Return: Zero on success, negative on failure.
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*/
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int extension_remove(struct udevice *dev);
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/**
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* extension_scan - Scan extension boards available.
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* Return: Zero on success, negative on failure.
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*/
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int extension_scan(void);
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/**
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* extension_apply - Apply extension board overlay to the devicetree
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* @working_fdt: Pointer to working flattened device tree
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* @size: Size of the devicetree overlay
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* Return: Zero on success, negative on failure.
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*/
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int extension_apply(struct fdt_header *working_fdt, ulong size);
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/**
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* extension - Description fields of an extension board
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* @name: Name of the extension
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* @owner: Owner of the extension
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* @version: Version of the extension
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* @overlay: Devicetree overlay name to be loaded for this extension
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* @other: Other information of this extension
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*/
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struct extension {
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char name[32];
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char owner[32];
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char version[32];
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char overlay[64];
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char other[32];
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};
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struct extension_ops {
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/**
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* scan - Add system-specific function to scan extension boards.
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* @dev: extension device
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* @extension_list: alist of extension to expand
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* Return: The number of extension or a negative value in case of
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* error.
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*/
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int (*scan)(struct udevice *dev, struct alist *extension_list);
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};
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#define extension_get_ops(dev) ((struct extension_ops *)(dev)->driver->ops)
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/* Currently, only one extension driver enabled at a time is supported */
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#define U_BOOT_EXTENSION(_name, _scan_func) \
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U_BOOT_DRIVER(_name) = { \
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.name = #_name, \
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.id = UCLASS_EXTENSION, \
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.probe = extension_probe, \
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.remove = extension_remove, \
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.ops = &(struct extension_ops) { \
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.scan = _scan_func, \
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}, \
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.priv_auto = sizeof(struct alist), \
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}
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#endif /* __EXTENSION_SUPPORT_H */
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