[U-Boot] [PATCH 3/3] mx6sxsabresd: Use PARTUUID to specify the rootfs location

[Stefano Babic]

On 22/11/2017 14:15, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam at nxp.com>
> 
> mx6sxsabresd 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 <fabio.estevam at nxp.com>
> ---
>  configs/mx6sxsabresd_defconfig | 1 +
>  include/configs/mx6sxsabresd.h | 5 +++--
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/configs/mx6sxsabresd_defconfig b/configs/mx6sxsabresd_defconfig
> index ac36a18..b707322 100644
> --- a/configs/mx6sxsabresd_defconfig
> +++ b/configs/mx6sxsabresd_defconfig
> @@ -12,6 +12,7 @@ CONFIG_CMD_BOOTZ=y
>  CONFIG_CMD_GPIO=y
>  CONFIG_CMD_I2C=y
>  CONFIG_CMD_MMC=y
> +CONFIG_CMD_PART=y
>  CONFIG_CMD_PCI=y
>  CONFIG_CMD_USB=y
>  # CONFIG_CMD_SETEXPR is not set
> diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h
> index 85b8601..906e677 100644
> --- a/include/configs/mx6sxsabresd.h
> +++ b/include/configs/mx6sxsabresd.h
> @@ -58,9 +58,9 @@
>  	"videomode=video=ctfb:x:800,y:480,depth:24,pclk:29850,le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0\0" \
>  	"mmcdev=2\0" \
>  	"mmcpart=1\0" \
> -	"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \
> +	"finduuid=part uuid mmc 2:2 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 ...; " \
> @@ -68,6 +68,7 @@
>  	"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 " \
> 

Reviewed-by: Stefano Babic <sbabic at denx.de>

Best regards,
Stefano

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