[PATCH v2 2/3] ARM: dts: aspeed: Add USB2.0 device controller node

[Neal Liu]

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
> Sent: Tuesday, May 17, 2022 10:54 PM
> To: Neal Liu <neal_liu at aspeedtech.com>; Greg Kroah-Hartman
> <gregkh at linuxfoundation.org>; Rob Herring <robh+dt at kernel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt at linaro.org>; Joel Stanley <joel at jms.id.au>;
> Andrew Jeffery <andrew at aj.id.au>; Felipe Balbi <balbi at kernel.org>; Sumit
> Semwal <sumit.semwal at linaro.org>; Christian König
> <christian.koenig at amd.com>; Geert Uytterhoeven <geert at linux-m68k.org>;
> Li Yang <leoyang.li at nxp.com>
> Cc: linux-aspeed at lists.ozlabs.org; linux-usb at vger.kernel.org;
> devicetree at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> linux-kernel at vger.kernel.org; linux-media at vger.kernel.org;
> dri-devel at lists.freedesktop.org; linaro-mm-sig at lists.linaro.org
> Subject: Re: [PATCH v2 2/3] ARM: dts: aspeed: Add USB2.0 device controller
> node
> 
> On 17/05/2022 16:50, Neal Liu wrote:
> >> -----Original Message-----
> >> From: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
> >> Sent: Tuesday, May 17, 2022 8:00 PM
> >> To: Neal Liu <neal_liu at aspeedtech.com>; Greg Kroah-Hartman
> >> <gregkh at linuxfoundation.org>; Rob Herring <robh+dt at kernel.org>;
> >> Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>; Joel Stanley
> >> <joel at jms.id.au>; Andrew Jeffery <andrew at aj.id.au>; Felipe Balbi
> >> <balbi at kernel.org>; Sumit Semwal <sumit.semwal at linaro.org>; Christian
> >> König <christian.koenig at amd.com>; Geert Uytterhoeven
> >> <geert at linux-m68k.org>; Li Yang <leoyang.li at nxp.com>
> >> Cc: linux-aspeed at lists.ozlabs.org; linux-usb at vger.kernel.org;
> >> devicetree at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> >> linux-kernel at vger.kernel.org; linux-media at vger.kernel.org;
> >> dri-devel at lists.freedesktop.org; linaro-mm-sig at lists.linaro.org
> >> Subject: Re: [PATCH v2 2/3] ARM: dts: aspeed: Add USB2.0 device
> >> controller node
> >>
> >> On 17/05/2022 10:25, Neal Liu wrote:
> >>> Add USB2.0 device controller(udc) node to device tree for AST2600.
> >>>
> >>> Signed-off-by: Neal Liu <neal_liu at aspeedtech.com>
> >>> ---
> >>>  arch/arm/boot/dts/aspeed-g6.dtsi | 10 ++++++++++
> >>>  1 file changed, 10 insertions(+)
> >>>
> >>> diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi
> >>> b/arch/arm/boot/dts/aspeed-g6.dtsi
> >>> index 3d5ce9da42c3..5517313eb2b5 100644
> >>> --- a/arch/arm/boot/dts/aspeed-g6.dtsi
> >>> +++ b/arch/arm/boot/dts/aspeed-g6.dtsi
> >>> @@ -298,6 +298,16 @@ vhub: usb-vhub at 1e6a0000 {
> >>>  			status = "disabled";
> >>>  		};
> >>>
> >>> +		udc: udc at 1e6a2000 {
> >>
> >> The same as DTS in bindings - generic node name, please.
> >>
> >
> > Is it possible to use "udc: usb-udc at 1e6a2000" to distinguish it between "vhub:
> usb-vhub at 1e6a0000"?
> 
> Possible yes :), but not recommended and not wanted. Nodes should be generic
> and prefixes are added only if there is no unit address. You can though use
> some more descriptive label.
> 
"udc: usb at 1e6a2000" is okay for you?

> 
> Best regards,
> Krzysztof