How to enable UHS mode for SD card in u-boot_201304

[宗標廖]

Hello,

Community

I have a i.MX6Q custom board, and it supports switching to 1.8v for SDIO.

When I worked with u-boot_200908(LTIB version), I can enable the UHS mode

for SD card by setting port_supports_uhs18v filed of struct fsl_esdhc_cfg to 1.

But now I am working with u-boot_201304(Yocto Version), and in this version,

the struct fsl_esdhc_cfg  does not have port_supports_uhs18v filed.So I donnot

know how to enable UHS mode for SD card in u-boot_201304.

Could you help me!

Best Regards,

ZongbiaoLiao

[igorpadykov]

Hi ZongbiaoLiao

in u-boot_201304 voltage change is handled using

host capabilities register (HC_HOSTCAPBLT_VS18, ESDHC_HOSTCAPBLT_VS30, fsl_esdhc.c)

http://code.metager.de/source/history/denx/u-boot/drivers/mmc/

Best regards

igor

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