Re: [PATCH] phy: lantiq: rcu-usb2: wait after clock enable

[Martin Blumenstingl]

On Thu, Jan 7, 2021 at 11:49 PM Mathias Kresin <dev@xxxxxxxxx> wrote:
>
> Commit 65dc2e725286 ("usb: dwc2: Update Core Reset programming flow.")
> revealed that the phy isn't ready immediately after enabling it's
> clocks. The dwc2_check_core_version() fails and the dwc2 usb driver
> errors out.
>
> Add a short delay to let the phy get up and running. There isn't any
> documentation how much time is required, the value was chosen based on
> tests.
>
> Cc: <stable@xxxxxxxxxxxxxxx> # v5.7+
> Signed-off-by: Mathias Kresin <dev@xxxxxxxxx>
Acked-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>