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**Date** **Thread**

> On R-Car Gen2, you do get an external abort when accessing hardware
> registers while the module's clock is turned off.  Has anyone tested
> usbhs on R-Car Gen2 recently?
>
Yes I tested this with the patch applied,
https://gist.github.com/prabhakarlad/3d1bbb6f745d8d867c8e6e009ab93f8d

1] For R-Car Gen3 looking at the r8a77951.dtsi we have the below:

hsusb: usb@e6590000 {
        compatible = "renesas,usbhs-r8a7795",
        ...
        clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>;
        ....
};

The same clocks are used for ehci0/ohci0/phy0 in  r8a77951.dtsi,
probably by the time we reach probing the usbhs driver these clocks
may have been already enabled hence register reads were sensible.

2] For the R-Car Gen2, looking at the RZ/G1H USBHS node we have the below:

hsusb: usb@e6590000 {
    ....
    clocks = <&cpg CPG_MOD 704>;
    ....
};

Same clock is for USBPHY, even in this case the PHY driver is probed
first due to which the clock is ON and then we probe usbhs driver..

Cheers,
Prabhakar