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clock frequency of sdio in u-boot & linux

Question asked by ranshalit on Nov 10, 2016
Latest reply on Nov 11, 2016 by igorpadykov

Hello,

 

In linux device tree there is configuration for sdio clock-frequency:

&usdhc2 {

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_usdhc2_2>;

    no-1-8-v;

    bus-width = <4>;

    clock-frequency = <40000000>;

    max-frequency = <40000000>;

    keep-power-in-suspend;

    enable-sdio-wakeup;

    status = "okay";

};

But in u-boot I don't find such configuration, so I wander, how is it that u-boot can manage working with sdio in a slower rate, while linux need to be configured for that rate in device tree ?

 

Thank you,

Ran

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