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MMC Issue with Upgrade to Kernel 4.1.15

Question asked by Paul DeMetrotion on Jul 15, 2016
Latest reply on Jul 18, 2016 by Fabio Estevam

I have a custom device based on the MX6Q processor that works fine with Kernel version 3.14.52. I am trying to upgrade to Kernel version 4.1.15 but the boot process will not complete due to MMC issues. Don't know if I am missing a new device tree parameter or a patch file?


The boot process stops at this line: Waiting for root device /dev/mmcblk0p2...


Here is the section of the boot cycle that is MMC specific:


sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

sdhci-pltfm: SDHCI platform and OF driver helper

/soc/aips-bus@02100000/usdhc@02190000: voltage-ranges unspecified

sdhci-esdhc-imx 2190000.usdhc: could not get ultra high speed state, work on normal mode

sdhci-esdhc-imx 2190000.usdhc: Got CD GPIO

sdhci-esdhc-imx 2190000.usdhc: No vmmc regulator found

sdhci-esdhc-imx 2190000.usdhc: No vqmmc regulator found

mmc0: SDHCI controller on 2190000.usdhc [2190000.usdhc] using ADMA

/soc/aips-bus@02100000/usdhc@02194000: voltage-ranges unspecified

sdhci-esdhc-imx 2194000.usdhc: could not get ultra high speed state, work on normal mode

sdhci-esdhc-imx 2194000.usdhc: No vmmc regulator found

sdhci-esdhc-imx 2194000.usdhc: No vqmmc regulator found

mmc1: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA


The 3.14.52 Kernel has additional MMC messages that I do not see for the newer version. These are here:


mmc0: new high speed SDHC card at address 1234

mmcblk0: mmc0:1234 SA08G 7.21 GiB

mmcblk0: p1 p2


Any insight would be appreciated!