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sd-uhs-sdr104 setting in .dts file for i.MX6QP

Question asked by Takayuki Ishii on Jul 13, 2020
Latest reply on Jul 23, 2020 by Takayuki Ishii

Hello community, 


I hope to know how register setting in "sdhci-esdhc-imx.c" if SDR104 card is inserted about delay line auto-tuning.


1. Which value does it set uSDHCx_MIX_CTRL register to enable auto tuning?

2. How set DLY_CELL_SET_XXXX bit in uSDHCx_CLK_TUNE_CTRL_STATUS register?


In Documentation/devicetree/bindings/mmc/mmc.txt, "sd-uhs-sdr104" is commented as following.

- sd-uhs-sdr104: SD UHS SDR104 speed is supported

3. Is it effect for usdhc in i.mx6xxx.dts file?


I look forward to hearing from you.


Best regards,