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board: st: stm32mp25: support dynamic A/B bank bootup

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Enable automatic detection of the active A/B bank by retrieving
partition GUIDs from FWU metadata.

This ensures the system correctly identifies the bootable partitions
even in multi-bank scenarios, falling back to a standard bootable flag
scan if the UUIDs are missing.

To enable A/B bank bootup on stm32mp25 boards, add the following Kconfig
options to the stm32mp25_defconfig:

 CONFIG_FWU_MULTI_BANK_UPDATE=y
 CONFIG_FWU_MDATA=y
 CONFIG_FWU_NUM_BANKS=2
 CONFIG_FWU_NUM_IMAGES_PER_BANK=3
 CONFIG_CMD_FWU_METADATA=y
 CONFIG_FWU_MDATA_V2=y

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Dario Binacchi
2026-04-30 10:06:09 +02:00
committed by Patrice Chotard
parent 63fc73ff31
commit 4300f9f4c5
2 changed files with 47 additions and 0 deletions
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32
board/st/stm32mp2/stm32mp2.c
View File

@@ -208,4 +208,36 @@ void fwu_plat_get_bootidx(uint *boot_idx)
*boot_idx = (readl(TAMP_FWU_BOOT_INFO_REG) >>
TAMP_FWU_BOOT_IDX_OFFSET) & TAMP_FWU_BOOT_IDX_MASK;
}
int fwu_platform_hook(struct udevice *dev, struct fwu_data *data)
{
uint boot_idx;
efi_guid_t boot_uuid, root_uuid;
const efi_guid_t boot_type_guid = PARTITION_XBOOTLDR;
const efi_guid_t root_type_guid =
PARTITION_LINUX_FILE_SYSTEM_DATA_GUID;
char uuidbuf[UUID_STR_LEN + 1];
int retb, retr;
fwu_plat_get_bootidx(&boot_idx);
retb = fwu_mdata_get_image_guid(&boot_uuid, &boot_type_guid, boot_idx);
retr = fwu_mdata_get_image_guid(&root_uuid, &root_type_guid, boot_idx);
if (!retb && !retr) {
uuid_bin_to_str(boot_uuid.b, uuidbuf, UUID_STR_FORMAT_GUID);
env_set("boot_partuuid", uuidbuf);
uuid_bin_to_str(root_uuid.b, uuidbuf, UUID_STR_FORMAT_GUID);
env_set("root_partuuid", uuidbuf);
} else if (!retb && retr) {
log_warning("%s: found boot GUID but missing root GUID (%d)\n",
__func__, retr);
} else if (!retr && retb) {
log_warning("%s: found root GUID but missing boot GUID (%d)\n",
__func__, retb);
}
return 0;
}
#endif /* CONFIG_FWU_MULTI_BANK_UPDATE */

15
include/configs/stm32mp25_st_common.h
View File

@@ -8,7 +8,22 @@
#ifndef __CONFIG_STM32MP25_ST_COMMON_H__
#define __CONFIG_STM32MP25_ST_COMMON_H__
#ifdef CONFIG_FWU_MULTI_BANK_UPDATE
#define SCAN_DEV_FOR_BOOT_PARTS \
"setenv devplist; " \
"env exists boot_partuuid && " \
"part number ${devtype} ${devnum} ${boot_partuuid} devplist; " \
"env exists devplist || " \
"part list ${devtype} ${devnum} -bootable devplist; "
#define ST_STM32MP25_FWU_ENV \
"altbootcmd=${bootcmd}\0"
#else
#define ST_STM32MP25_FWU_ENV
#endif
#define STM32MP_BOARD_EXTRA_ENV \
ST_STM32MP25_FWU_ENV \
"usb_pgood_delay=2000\0" \
"console=ttySTM0\0"