Hi,
We are using i.MX8M custom board with Linux4.9.51_ga release.
We are facing issue with UHS sd cards.
Even after removing "sd-uhs-sdr104" property from "&usdhc2" node in dts, card will detect with UHS SDR104 mode and fails. Kindly let us know where exactly we needs to change in order to make card detect only n DDR50 mode.
Thanks in advance.
Regards,
Yashavantha
Hi Yashavantha
"sd-uhs-sdr104" property is not supported by i.MX8M usdhc driver
fsl-imx8mq.dtsi\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel
one can try "no-1-8-v", like:
&usdhc { ..
no-1-8-v;
status = "okay";
Best regards
igor
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Hi Igor,
What do u mean by ""sd-uhs-sdr104" property is not supported by i.MX8M"? Can't we test ultra high speed cards in i.MX8M board?
Then what is the maximum SD speed supported?
Thanks and Regards,
Yashavantha
"sd-uhs-sdr104" property is optional and not supported by i.MX8M esdhc driver
linux/drivers/mmc/host/sdhci-esdhc-imx.c
sdhci-esdhc-imx.c\host\mmc\drivers - linux-imx - i.MX Linux kernel
What is supported is documented on
linux/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
fsl-imx-esdhc.txt\mmc\bindings\devicetree\Documentation - linux-imx - i.MX Linux kernel
Supported speeds are described in sect.10.3.1.1 Features i.MX8M Reference Manual.
Best regards
igor
Hi,
Any answer?
Thanks and Regardsm
Yashavantha