Am Donnerstag, 8. September 2022, 11:12:23 CEST schrieb Jun Li:
> > -----Original Message-----
> > From: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > Sent: Wednesday, September 7, 2022 10:46 PM
> > To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>; Rob Herring
> > <robh+dt@xxxxxxxxxx>; Krzysztof Kozlowski
> > <krzysztof.kozlowski+dt@xxxxxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>;
> > Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>; Pengutronix Kernel Team
> > <kernel@xxxxxxxxxxxxxx>; Fabio Estevam <festevam@xxxxxxxxx>; dl-linux-imx
> > <linux-imx@xxxxxxx>; Jun Li <jun.li@xxxxxxx>
> > Cc: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>;
> > linux-usb@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx;
> > linux-kernel@xxxxxxxxxxxxxxx
> > Subject: [PATCH 3/4] arm64: dts: imx8mp: Add snps,gfladj-refclk-lpm-sel
> > quirk to USB nodes
> >
> > With this set the SOF/ITP counter is based on ref_clk when 2.0 ports are
> > suspended.
> >
> > Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > ---
> >
> > arch/arm64/boot/dts/freescale/imx8mp.dtsi | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > index 53493dc7d976..0e7f5842a3e4 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > @@ -1300,6 +1300,7 @@ usb_dwc3_0: usb@38100000 {
> >
> > phys = <&usb3_phy0>, <&usb3_phy0>;
> > phy-names = "usb2-phy", "usb3-
phy";
> > snps,dis-u2-freeclk-exists-quirk;
>
> So this property can be removed?
I'm not so sure about this one, as the description is talking about USB2 PHY
providing a free-running PHY clock. I don't know the details if this is true
or not.
But removing snps,dis-u2-freeclk-exists-quirk from both USB device nodes, USB
devices attachments are still detected when the USB hub is suspended, both
super-speed and high-speed ports.
Best regards,
Alexander
> > + snps,gfladj-refclk-lpm-sel-quirk;
> >
> > };
> >
> > };
> >
> > @@ -1342,6 +1343,7 @@ usb_dwc3_1: usb@38200000 {
> >
> > phys = <&usb3_phy1>, <&usb3_phy1>;
> > phy-names = "usb2-phy", "usb3-
phy";
> > snps,dis-u2-freeclk-exists-quirk;
>
> Ditto.
>
> Li Jun
>
> > + snps,gfladj-refclk-lpm-sel-quirk;
> >
> > };
> >
> > };
> >
> > --
> > 2.25.1
