mx6slevk: Use PARTUUID to specify the rootfs location
PATCH 1/1 mx6slevk: Use PARTUUID to specify the rootfs location
From: Fabio Estevam <[email protected]>
mx6slevk can run different kernel versions, such as NXP 4.1 or mainline.
Currently the rootfs location is passed via mmcblk number and the problem with this approach is that the mmcblk number for the SD card changes depending on the kernel version.
In order to avoid such issue, use the UUID method to specify the rootfs location.
--- configs/mx6slevk_defconfig | 1 + configs/mx6slevk_spl_defconfig | 1 + include/configs/mx6slevk.h | 5 +++-- 3 files changed, 5 insertions(+), 2 deletions(-)
configs/mx6slevk_defconfig +1 -0
@@ -13,6 +13,7 @@ CONFIG_CMD_BOOTZ=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y +CONFIG_CMD_PART=y CONFIG_CMD_SF=y CONFIG_CMD_USB=y # CONFIG_CMD_SETEXPR is not set
configs/mx6slevk_spl_defconfig +1 -0
@@ -21,6 +21,7 @@ CONFIG_CMD_BOOTZ=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y +CONFIG_CMD_PART=y CONFIG_CMD_SF=y CONFIG_CMD_USB=y CONFIG_CMD_DHCP=y
include/configs/mx6slevk.h +3 -2
@@ -53,9 +53,9 @@"ip_dyn=yes\0" \"mmcdev=1\0" \"mmcpart=1\0" \ -"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \ +"finduuid=part uuid mmc 1:2 uuid\0" \"mmcargs=setenv bootargs console=${console},${baudrate} " \ -"root=${mmcroot}\0" \ +"root=PARTUUID=${uuid} rootwait rw\0" \"loadbootscript=" \"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \"bootscript=echo Running bootscript from mmc ...; " \
@@ -63,6 +63,7 @@"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \"mmcboot=echo Booting from mmc ...; " \ +"run finduuid; " \"run mmcargs; " \"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \"if run loadfdt; then " \
Signature · 1 line
2.7.4
PATCH 1/1 mx6slevk: Use PARTUUID to specify the rootfs location
Quoted 8 lines · Fabio Estevam
From: Fabio Estevam <[email protected]>
mx6slevk can run different kernel versions, such as NXP 4.1 or mainline.
Currently the rootfs location is passed via mmcblk number and the problem with this approach is that the mmcblk number for the SD card changes depending on the kernel version.
Quoted 5 lines
In order to avoid such issue, use the UUID method to specify the rootfs location.
Signed-off-by Fabio Estevam <[email protected]>---
Applied to u-boot-imx, thanks !
Best regards,
Stefano Babic
Signature · 5 lines
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PATCH 1/1 mx6slevk: Use PARTUUID to specify the rootfs location
In reply to Fabio EstevamQuoted 47 lines · Fabio Estevam
From: Fabio Estevam <[email protected]>
mx6slevk can run different kernel versions, such as NXP 4.1 or mainline.
Currently the rootfs location is passed via mmcblk number and the problem with this approach is that the mmcblk number for the SD card changes depending on the kernel version.
In order to avoid such issue, use the UUID method to specify the rootfs location.
Signed-off-by Fabio Estevam <[email protected]>--- configs/mx6slevk_defconfig | 1 + configs/mx6slevk_spl_defconfig | 1 + include/configs/mx6slevk.h | 5 +++-- 3 files changed, 5 insertions(+), 2 deletions(-)configs/mx6slevk_defconfig +1
-0@@ -13,6 +13,7 @@ CONFIG_CMD_BOOTZ=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y +CONFIG_CMD_PART=y CONFIG_CMD_SF=y CONFIG_CMD_USB=y # CONFIG_CMD_SETEXPR is not setconfigs/mx6slevk_spl_defconfig +1
-0@@ -21,6 +21,7 @@ CONFIG_CMD_BOOTZ=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y +CONFIG_CMD_PART=y CONFIG_CMD_SF=y CONFIG_CMD_USB=y CONFIG_CMD_DHCP=yinclude/configs/mx6slevk.h +0
-0
include/configs/mx6slevk.h line 58
Quoted 8 lines
include/configs/mx6slevk.h +2
-2@@ -53,9 +53,9 @@"ip_dyn=yes\0" \"mmcdev=1\0" \"mmcpart=1\0" \ -"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \ +"finduuid=part uuid mmc 1:2 uuid\0" \"mmcargs=setenv bootargs console=${console},${baudrate} " \ -"root=${mmcroot}\0" \ +"root=PARTUUID=${uuid} rootwait rw\0" \
Shouldn't mmcpart be changed to 2 here as well and finduud be part uuid ${mmcdev}:${mmcpart} ? This would also make things a bit more scriptable for use in other distros.
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PATCH 1/1 mx6slevk: Use PARTUUID to specify the rootfs location
Quoted 3 lines · Tom Rini
Shouldn't mmcpart be changed to 2 here as well and finduud be part uuid ${mmcdev}:${mmcpart} ? This would also make things a bit more scriptable for use in other distros.
mmcpart is still used to load kernel and dtb from the fat partition, so it should remain at 1.
I can probably remove this partition scheme assumptions from U-Boot and use distro_config instead for the next release.
Thanks
Quoted 3 lines
--
Tom
PATCH 1/1 mx6slevk: Use PARTUUID to specify the rootfs location
Quoted 11 lines · Fabio Estevam
Quoted 3 lines · Tom Rini
Shouldn't mmcpart be changed to 2 here as well and finduud be part uuid ${mmcdev}:${mmcpart} ? This would also make things a bit more scriptable for use in other distros.
mmcpart is still used to load kernel and dtb from the fat partition, so it should remain at 1.
I can probably remove this partition scheme assumptions from U-Boot and use
distro_configinstead for the next release.
OK, thanks.
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