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lib: Add devtree_update bootstate hook

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Provide a weak devtree_update() hook and invoke it early in ramstage
at BS_PRE_DEVICE. Mainboards can override devtree_update() to
enable/disable devices at runtime based on CMOS/NVRAM settings.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ic84ddb25e1da050543c230ea457042b8a8a3061f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91250
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Sean Rhodes 2026-02-15 21:12:13 +00:00
commit f8494fbeae
3 changed files with 31 additions and 0 deletions
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src/include/devtree_update.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __DEVTREE_UPDATE_H__
#define __DEVTREE_UPDATE_H__
/*
* Optional mainboard hook to update devicetree runtime enable/disable state
* based on CMOS/NVRAM settings.
*
* This function is called early in ramstage at BS_PRE_DEVICE.
*/
void devtree_update(void);
#endif /* __DEVTREE_UPDATE_H__ */