On Wed, Jun 19, 2019 at 1:17 AM Jernej Škrabec <jernej.skra...@gmail.com> wrote:
>
> Dne torek, 18. junij 2019 ob 19:13:16 CEST je Clément Péron napisal(a):
> > Hi,
> >
> > On Thu, 16 May 2019 at 03:27, Andre Przywara <andre.przyw...@arm.com> wrote:
> > > The first USB controller on the H6 SoC shares a PHY with the OTG
> > > controller. Reportedly to avoid problems with the VBUS regulator under
> > > Linux, we don't link OHCI0/EHCI0 to the USB PHY in the H6 .dtsi file.
> > >
> > > However on boards which can't use peripheral mode (because they have an
> > > always-on VBUS supply on an USB-A socket) we don't need this trick, and
> > > can properly connect host controller 0 to the PHY 0.
> > >
> > > Amend the Pine H64 .dts to reflect this. This enables the upper USB port
> > > in U-Boot on this board.
> > >
> > > Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
> > > ---
> > >
> > > arch/arm/dts/sun50i-h6-pine-h64.dts | 5 ++++-
> > > 1 file changed, 4 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm/dts/sun50i-h6-pine-h64.dts
> > > b/arch/arm/dts/sun50i-h6-pine-h64.dts index 4802902e12..aad7646b18 100644
> > > --- a/arch/arm/dts/sun50i-h6-pine-h64.dts
> > > +++ b/arch/arm/dts/sun50i-h6-pine-h64.dts
> > > @@ -96,6 +96,8 @@
> > >
> > > };
> > >
> > > &ehci0 {
> > >
> > > + phys = <&usb2phy 0>;
> > > + phy-names = "usb";
> > >
> > > status = "okay";
> > >
> > > };
> > >
> > > @@ -120,6 +122,8 @@
> > >
> > > };
> > >
> > > &ohci0 {
> > >
> > > + phys = <&usb2phy 0>;
> > > + phy-names = "usb";
> > >
> > > status = "okay";
> > >
> > > };
> > >
> > > @@ -255,7 +259,6 @@
> > >
> > > &usb2otg {
> > >
> > > dr_mode = "host";
> > >
> > > - status = "okay";
> > >
> > > };
> >
> > Maybe you should add explicit comments in the device-tree to avoid
> > losing this at next sync with linux dt.
>
> If DT change is U-Boot specific, it should be moved to *-u-boot.dtsi file,
> although I'm not sure if you can delete properties in such way.
You can use /delete-property/. Though in the case of "status",
it is best to set it to "disabled", since no property is the same
as "okay".
The question then becomes when the *-u-boot.dtsi file is merged in.
ChenYu
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