Hi Romain
Change
set_bootargs=setenv bootargs console=ttyO0,115200n8 root=/dev/${
bootpartition} ro rootfstype=ext4 rootwait
to
set_bootargs=setenv bootargs console=ttyO0,115200n8 root=/dev/${
bootpartition} rw rootfstype=ext4 rootwait
On Wednesday, November 21, 2018 at 3:24:51 PM UTC+7, Romain REIGNIER wrote:
>
> Hi everyone,
>
> I am facing an issue with uBoot.
>
> I have built a small system with buildroot 2018.05 and mainline uBoot
> 2018.03.
> The whole sdcard.img image has been dd to /dev/mmcblk1.
> I have tried both am335x_evm_defconfig and am335x_boneblack_defconfig.
>
> But on uBoot start, it seems that it does not read the uEnv.txt file.
> But if I put the zImage in mmcblk1p2 in /boot, it manages to find the
> image and start the kernel but with default bootargs.
>
> I have the following log:
>
> U-Boot SPL 2018.03 (Nov 20 2018 - 19:28:32 +0100)
> Trying to boot from MMC2
> Loading Environment from FAT... Card did not respond to voltage select!
> ** Bad device mmc 0 **
> Failed (-5)
>
>
> U-Boot 2018.03 (Nov 20 2018 - 19:28:32 +0100)
>
> CPU : AM335X-GP rev 2.1
> Model: TI AM335x BeagleBone Black
> DRAM: 512 MiB
> NAND: 0 MiB
> MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
> Loading Environment from FAT... MMC: no card present
> ** Bad device mmc 0 **
> Failed (-5)
> No USB device found
> <ethaddr> not set. Validating first E-fuse MAC
> Net: eth0: ethernet@4a100000
> Hit any key to stop autoboot: 0
> MMC: no card present
> MMC: no card present
> MMC: no card present
> MMC: no card present
> MMC: no card present
> switch to partitions #0, OK
> mmc1(part 0) is current device
> Scanning mmc 1:1...
> switch to partitions #0, OK
> mmc1(part 0) is current device
> SD/MMC found on device 1
> 4517040 bytes read in 309 ms (13.9 MiB/s)
> 38181 bytes read in 20 ms (1.8 MiB/s)
> ## Flattened Device Tree blob at 88000000
> Booting using the fdt blob at 0x88000000
> Loading Device Tree to 8fff3000, end 8ffff524 ... OK
>
> Starting kernel ...
>
> I have copied the uEnv.txt file to :
>
> - mmcblk1p1 -> /uEnv.txt
> - mmcblk1p1 -> /boot/uEnv.txt
> - mmcblk1p2 -> /uEnv.txt
> - mmcblk1p2 -> /boot/uEnv.txt
>
> My goal was to put it in mmcblk1p1 as /uEnv.txt, so my uEnv.txt content is
> :
>
> bootpart=1:1
> devtype=mmc
> bootdir=
> bootfile=zImage
> bootpartition=mmcblk1p2
> set_bootargs=setenv bootargs console=ttyO0,115200n8 root=/dev/${
> bootpartition} ro rootfstype=ext4 rootwait
> uenvcmd=run set_bootargs;run loadimage;run loadfdt;printenv bootargs;bootz
> ${loadaddr} - ${fdtaddr}
>
> So the fallback could be OK, but I want my rootfs to be mounted as
> read-only and the default cmdline is set to rw.
>
> Does anyone have already encounter this issue?
>
> Romain
>
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