i.MX Processors中的主题 [IMX6Q] Waiting for MMC device

[IMX6Q] Waiting for MMC device

mathijsjonker — Mon, 09 Jan 2017 13:54:18 GMT

Hi all,

I'm trying to switch from an ancient linux to a newer linux. I see there is upstream support for Compulab's CM-FX6 which is imx6q compatible. There is a DTS for this board in the Linux. I'm using the latest buildroot to compile everything, compilation is working properly but I'm having issues when booting. It hangs with "Waiting for root device /dev/mmcblk0p2..."

I'm out of ideas on where to look for the solution.

I've attached the boot log and kernel config.

Any suggestion is appreciated

Original Attachment has been moved to: .config.zip
Original Attachment has been moved to: U-Boot-2014.04-cm-fx6-upstream-linux.zip

Re: [IMX6Q] Waiting for MMC device

mathijsjonker — Mon, 09 Jan 2017 14:58:53 GMT

btw I'm booting from SD. The kernel is located in the first partition and the rootfs in the second partition. U-boot has no problem loading the kernel from the SD card so the SD card is fine.

Re: [IMX6Q] Waiting for MMC device

vipulkumar — Mon, 09 Jan 2017 17:31:15 GMT

Hi Jonker,

The issue is that kernel is not able to find the file system from /dev/mmcblk0p2 to mount.

You need to pass correct partitions for file system in the u-boot environment.

Re: [IMX6Q] Waiting for MMC device

igorpadykov — Mon, 09 Jan 2017 23:53:30 GMT

Hi Mathijs

may be useful to check Table 27. Linux uSDHC relationships

atatched Linux Guide.

Best regards
igor

Re: [IMX6Q] Waiting for MMC device

mathijsjonker — Tue, 10 Jan 2017 07:09:00 GMT

I understand that it has problem finding the file system. The partition layout is correct, I've verified it from Ubuntu.

Re: [IMX6Q] Waiting for MMC device

mathijsjonker — Tue, 10 Jan 2017 07:12:25 GMT

Thanks for the mapping table, however Linux reports no SD devices at all even tho the kernel was loaded from it.

Re: [IMX6Q] Waiting for MMC device

quigibo — Tue, 18 Jul 2017 23:13:47 GMT

Any solution? This sounds exactly like what I'm running into.