Re: [PATCH v2 3/3] usb: renesas_usbhs: Reorder clock handling and power management in probe

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Hi Geert,

On Tue, Apr 8, 2025 at 4:43 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> Hi Shimoda-san,
>
> On Tue, 8 Apr 2025 at 12:40, Yoshihiro Shimoda
> <yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> > > From: Prabhakar, Sent: Monday, April 7, 2025 7:50 PM
> > >
> > > Reorder the initialization sequence in `usbhs_probe()` to enable runtime
> > > PM before accessing registers, preventing potential crashes due to
> > > uninitialized clocks.
> >
> > Just for a record. I don't know why, but the issue didn't occur on the original code
> > with my environment (R-Car H3). But, anyway, I understood that we need this patch for RZ/V2H.
>
> On R-Car Gen3 and later, the firmware must trap the external abort,
> as usually no crash happens, but register reads return zero when
> the module clock is turned off.  I am wondering why RZ/V2H behaves
> differently than R-Car Gen3?
>

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