[U-Boot] [PATCH] ARM: ti_armv7_common: Use partuuid for detecting mmc root fs

[Lokesh Vutla]

Linux kernel can enumerate mmc sd as either mmcblk0 or mmcblk1.
But u-boot default environment assumes that sd always populates
as mmcblk0. With this the root fs is not being mounted when
mmc sd is enumerated as mmcblk1.
So use partuuid to update root= option in default environment.
Defining all the mmcargs in ti_armv7_common.h instead of
defining these in all omap/amx3x board files.

Reported-by: Yan Liu <yan-liu at ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
---
 include/configs/am335x_evm.h      |  9 ++-------
 include/configs/am43xx_evm.h      |  9 ++-------
 include/configs/ti_armv7_common.h | 10 ++++++++++
 include/configs/ti_omap4_common.h | 10 +++-------
 include/configs/ti_omap5_common.h | 10 ++--------
 5 files changed, 19 insertions(+), 29 deletions(-)

diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index e89c49e..36de421 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -70,6 +70,7 @@
 #ifndef CONFIG_SPL_BUILD
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	DEFAULT_LINUX_BOOT_ENV \
+	DEFAULT_MMC_TI_ARGS \
 	"boot_fdt=try\0" \
 	"bootpart=0:2\0" \
 	"bootdir=/boot\0" \
@@ -80,15 +81,8 @@
 		"uuid_disk=${uuid_gpt_disk};" \
 		"name=rootfs,start=2MiB,size=-,uuid=${uuid_gpt_rootfs}\0" \
 	"optargs=\0" \
-	"mmcdev=0\0" \
-	"mmcroot=/dev/mmcblk0p2 ro\0" \
-	"mmcrootfstype=ext4 rootwait\0" \
 	"ramroot=/dev/ram0 rw\0" \
 	"ramrootfstype=ext2\0" \
-	"mmcargs=setenv bootargs console=${console} " \
-		"${optargs} " \
-		"root=${mmcroot} " \
-		"rootfstype=${mmcrootfstype}\0" \
 	"spiroot=/dev/mtdblock4 rw\0" \
 	"spirootfstype=jffs2\0" \
 	"spisrcaddr=0xe0000\0" \
@@ -171,6 +165,7 @@
 
 #define CONFIG_BOOTCOMMAND \
 	"run findfdt; " \
+	"run finduuid; " \
 	"run mmcboot;" \
 	"setenv mmcdev 1; " \
 	"setenv bootpart 1:2; " \
diff --git a/include/configs/am43xx_evm.h b/include/configs/am43xx_evm.h
index d148169..9c614b9 100644
--- a/include/configs/am43xx_evm.h
+++ b/include/configs/am43xx_evm.h
@@ -216,6 +216,7 @@
 #ifndef CONFIG_SPL_BUILD
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	DEFAULT_LINUX_BOOT_ENV \
+	DEFAULT_MMC_TI_ARGS \
 	"fdtfile=undefined\0" \
 	"bootpart=0:2\0" \
 	"bootdir=/boot\0" \
@@ -225,18 +226,11 @@
 		"uuid_disk=${uuid_gpt_disk};" \
 		"name=rootfs,start=2MiB,size=-,uuid=${uuid_gpt_rootfs}\0" \
 	"optargs=\0" \
-	"mmcdev=0\0" \
-	"mmcroot=/dev/mmcblk0p2 rw\0" \
-	"mmcrootfstype=ext4 rootwait\0" \
 	"usbroot=/dev/sda2 rw\0" \
 	"usbrootfstype=ext4 rootwait\0" \
 	"usbdev=0\0" \
 	"ramroot=/dev/ram0 rw\0" \
 	"ramrootfstype=ext2\0" \
-	"mmcargs=setenv bootargs console=${console} " \
-		"${optargs} " \
-		"root=${mmcroot} " \
-		"rootfstype=${mmcrootfstype}\0" \
 	"usbargs=setenv bootargs console=${console} " \
 		"${optargs} " \
 		"root=${usbroot} " \
@@ -309,6 +303,7 @@
 
 #define CONFIG_BOOTCOMMAND \
 	"run findfdt; " \
+	"run finduuid; " \
 	"run mmcboot;" \
 	"run usbboot;" \
 	NANDBOOT \
diff --git a/include/configs/ti_armv7_common.h b/include/configs/ti_armv7_common.h
index 18fca02..73c2573 100644
--- a/include/configs/ti_armv7_common.h
+++ b/include/configs/ti_armv7_common.h
@@ -58,6 +58,16 @@
 	"ramdisk_addr_r=0x88080000\0" \
 	"bootm_size=0x10000000\0"
 
+#define DEFAULT_MMC_TI_ARGS \
+	"mmcdev=0\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
+	"finduuid=part uuid mmc 0:2 uuid\0" \
+	"mmcargs=setenv bootargs console=${console} " \
+		"${optargs} " \
+		"vram=${vram} " \
+		"root=PARTUUID=${uuid} rw" \
+		"rootfstype=${mmcrootfstype}\0"
+
 /*
  * Default to a quick boot delay.
  */
diff --git a/include/configs/ti_omap4_common.h b/include/configs/ti_omap4_common.h
index 2eaa3b6..e2f4917 100644
--- a/include/configs/ti_omap4_common.h
+++ b/include/configs/ti_omap4_common.h
@@ -83,20 +83,15 @@
  */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	DEFAULT_LINUX_BOOT_ENV \
+	DEFAULT_MMC_TI_ARGS \
 	"console=ttyO2,115200n8\0" \
 	"fdtfile=undefined\0" \
 	"bootpart=0:2\0" \
 	"bootdir=/boot\0" \
 	"bootfile=zImage\0" \
 	"usbtty=cdc_acm\0" \
+	"optargs=\0" \
 	"vram=16M\0" \
-	"mmcdev=0\0" \
-	"mmcroot=/dev/mmcblk0p2 rw\0" \
-	"mmcrootfstype=ext3 rootwait\0" \
-	"mmcargs=setenv bootargs console=${console} " \
-		"vram=${vram} " \
-		"root=${mmcroot} " \
-		"rootfstype=${mmcrootfstype}\0" \
 	"loadbootscript=load mmc ${mmcdev} ${loadaddr} boot.scr\0" \
 	"bootscript=echo Running bootscript from mmc${mmcdev} ...; " \
 		"source ${loadaddr}\0" \
@@ -128,6 +123,7 @@
 
 #define CONFIG_BOOTCOMMAND \
 	"run findfdt; " \
+	"run finduuid; " \
 	"mmc dev ${mmcdev}; if mmc rescan; then " \
 		"echo SD/MMC found on device ${mmcdev};" \
 		"if run loadbootscript; then " \
diff --git a/include/configs/ti_omap5_common.h b/include/configs/ti_omap5_common.h
index 1c1f8c0..b571355 100644
--- a/include/configs/ti_omap5_common.h
+++ b/include/configs/ti_omap5_common.h
@@ -70,6 +70,7 @@
 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	DEFAULT_LINUX_BOOT_ENV \
+	DEFAULT_MMC_TI_ARGS \
 	"console=" CONSOLEDEV ",115200n8\0" \
 	"fdtfile=undefined\0" \
 	"bootpart=0:2\0" \
@@ -80,14 +81,6 @@
 	"partitions=" PARTS_DEFAULT "\0" \
 	"optargs=\0" \
 	"dofastboot=0\0" \
-	"mmcdev=0\0" \
-	"mmcroot=/dev/mmcblk0p2 rw\0" \
-	"mmcrootfstype=ext4 rootwait\0" \
-	"mmcargs=setenv bootargs console=${console} " \
-		"${optargs} " \
-		"vram=${vram} " \
-		"root=${mmcroot} " \
-		"rootfstype=${mmcrootfstype}\0" \
 	"loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \
 	"bootscript=echo Running bootscript from mmc${mmcdev} ...; " \
 		"source ${loadaddr}\0" \
@@ -137,6 +130,7 @@
 		"echo Booting into fastboot ...; fastboot 0;" \
 	"fi;" \
 	"run findfdt; " \
+	"run finduuid; " \
 	"run mmcboot;" \
 	"setenv mmcdev 1; " \
 	"setenv bootpart 1:2; " \
-- 
2.1.4