[U-Boot] [PATCH] rockchip: use UUID for root partitions

[Kever Yang]

We use to use /dev/mmcbl0p7 as root partition, and pass it
to kernel by cmdline, but the mmc number in kernel in not
fixed, we need to change the bootargs to adapt it from time
to time.
We can use the UUID to fix it, the ID is from:
https://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/
ARM 32bit: 69dad710-2ce4-4e3c-b16c-21a1d49abed3
ARM 64bit: b921b045-1df0-41c3-af44-4c6f280d3fae

Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

 include/configs/rockchip-common.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/configs/rockchip-common.h b/include/configs/rockchip-common.h
index 9d183ce..e330cd5 100644
--- a/include/configs/rockchip-common.h
+++ b/include/configs/rockchip-common.h
@@ -28,6 +28,12 @@
 #endif
 
 #define CONFIG_RANDOM_UUID
+
+#ifdef CONFIG_ARM64
+#define ROOT_UUID "B921B045-1DF0-41C3-AF44-4C6F280D3FAE;\0"
+#else
+#define ROOT_UUID "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3;\0"
+#endif
 #define PARTS_DEFAULT \
 	"uuid_disk=${uuid_gpt_disk};" \
 	"name=loader1,start=32K,size=4000K,uuid=${uuid_gpt_loader1};" \
@@ -36,7 +42,7 @@
 	"name=loader2,size=4MB,uuid=${uuid_gpt_loader2};" \
 	"name=atf,size=4M,uuid=${uuid_gpt_atf};" \
 	"name=boot,size=112M,bootable,uuid=${uuid_gpt_boot};" \
-	"name=rootfs,size=-,uuid=${uuid_gpt_rootfs};\0" \
+	"name=rootfs,size=-,uuid="ROOT_UUID
 
 #endif
 
-- 
1.9.1