Re: [PATCH v1 6/8] usb: dwc3: add rk3568 dwc3 support

Peter Geis
2022-02-25T17:55:58Z

On Fri, Feb 25, 2022 at 12:08 PM Michael Riesch
<michael.riesch@wolfvision.net> wrote:
>
> Hi Peter,
>
> On 2/25/22 15:54, Peter Geis wrote:
> > The rk3568 dwc3 controller is backwards compatible with the rk3399 dwc3
> > controller.
> > Add support for it to the dwc3-of-simple driver.
> >
> > Signed-off-by: Peter Geis <pgwipeout@gmail.com>
> > ---
> > drivers/usb/dwc3/dwc3-of-simple.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
> > index 9dc6295df6b1..1d52a261af55 100644
> > --- a/drivers/usb/dwc3/dwc3-of-simple.c
> > +++ b/drivers/usb/dwc3/dwc3-of-simple.c
> > @@ -49,7 +49,8 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
> > * Some controllers need to toggle the usb3-otg reset before trying to
> > * initialize the PHY, otherwise the PHY times out.
> > */
> > - if (of_device_is_compatible(np, "rockchip,rk3399-dwc3"))
> > + if (of_device_is_compatible(np, "rockchip,rk3399-dwc3") |
> > + of_device_is_compatible(np, "rockchip,rk3568-dwc3"))
> > simple->need_reset = true;
>
> Maybe read this value out the match data...

This is a good idea, thanks!

>
> > simple->resets = of_reset_control_array_get(np, false, true,
> > @@ -176,6 +177,7 @@ static const struct of_device_id of_dwc3_simple_match[] = {
> > { .compatible = "hisilicon,hi3670-dwc3" },
> > { .compatible = "intel,keembay-dwc3" },
> > { .compatible = "rockchip,rk3399-dwc3" },
> > + { .compatible = "rockchip,rk3568-dwc3" },
>
> ... so all future variants that are compatible to the rk3399 can share it?
>
> Best regards,
> Michael
>
> > { .compatible = "sprd,sc9860-dwc3" },
> > { /* Sentinel */ }
> > };