[Buildroot] [PATCH v2 1/2] board/stm32mp157c-dk2: fix U-Boot corruption on the first boot

[Sergey Matyukevich]

The stm32mp157c-dk2 image successfully boots only once. Subsequent boot
attempts fail to reach U-Boot. The root cause turns out to be in U-Boot
corruption during the first boot. The stm32mp1 U-Boot stores its
environment at the end of GPT partition named 'ssbl' since v2020.10-rc2.
However Buildroot genimage template for stm32mp157 boards creates 'ssbl'
partition w/o extra space for U-Boot primary and redundant environments.
This patch explicitly specifies 'ssbl' partition size that should be
enough for both u-boot.stm32 image (~1M) and both environments (16K).

Signed-off-by: Sergey Matyukevich <geomatsi at gmail.com>
---
 board/stmicroelectronics/common/stm32mp157/genimage.cfg.template | 1 +
 1 file changed, 1 insertion(+)

diff --git a/board/stmicroelectronics/common/stm32mp157/genimage.cfg.template b/board/stmicroelectronics/common/stm32mp157/genimage.cfg.template
index f341c19f2f..03fba8daf0 100644
--- a/board/stmicroelectronics/common/stm32mp157/genimage.cfg.template
+++ b/board/stmicroelectronics/common/stm32mp157/genimage.cfg.template
@@ -13,6 +13,7 @@ image sdcard.img {
 
 	partition ssbl {
 		image = "u-boot.stm32"
+		size = 2M
 	}
 
 	partition rootfs {
-- 
2.32.0