[U-Boot] [PATCH v4 13/18] warp7: select uuid partition based on rootpart

[Bryan O'Donoghue]

Assigning the UUID discovery path to a tweakable environment variable means
that later steps in the boot process - particularly a boot script can
change the target root partition of a particular Linux boot.

Retargeting the rootfs is an important feature when doing ping/pong
upgrades allowing a boot script to select ping or pong as necessary without
reprogramming the bootloader.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue at linaro.org>
Tested-by: Breno Lima <breno.lima at nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam at nxp.com>
---
 include/configs/warp7.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/configs/warp7.h b/include/configs/warp7.h
index a92e6758bf..f2ee09b831 100644
--- a/include/configs/warp7.h
+++ b/include/configs/warp7.h
@@ -45,7 +45,8 @@
 	"ip_dyn=yes\0" \
 	"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \
 	"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \
-	"finduuid=part uuid mmc 0:2 uuid\0" \
+	"rootpart=" __stringify(CONFIG_WARP7_ROOT_PART) "\0" \
+	"finduuid=part uuid mmc 0:${rootpart} uuid\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
 		"root=PARTUUID=${uuid} rootwait rw\0" \
 	"loadbootscript=" \
-- 
2.17.0