Re: [PATCH v3 2/2] ARM: at91/dt: sama5d2: Use new compatible for ohci node

Alexandre Belloni
2016-06-08T10:33:09Z

On 08/06/2016 at 12:06:11 +0200, Nicolas Ferre wrote :
> Le 08/06/2016 06:15, Wenyou Yang a écrit :
> > Use compatible "atmel,sama5d2-ohci" to be capable of suspending
> > ports while sleep to save the power consumption.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> > ---
> >
> > Changes in v3: None
> > Changes in v2:
> > - Use the new compatible for ohci-node.
> >
> > arch/arm/boot/dts/sama5d2.dtsi | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi
> > index 78996bd..03d6724 100644
> > --- a/arch/arm/boot/dts/sama5d2.dtsi
> > +++ b/arch/arm/boot/dts/sama5d2.dtsi
> > @@ -232,7 +232,7 @@
> > };
> >
> > usb1: ohci@00400000 {
> > - compatible = "atmel,at91rm9200-ohci", "usb-ohci";
> > + compatible = "atmel,sama5d2-ohci", "usb-ohci";
>
> We must change this to:
> + compatible = "atmel,sama5d2-ohci", "atmel,at91rm9200-ohci", "usb-ohci";
>
> To make it independent from the one that may reach Mainline through the USB git tree.
>

Well, like discussed, I'd say that a new compatible is not needed as we
already know on which chip we are running depending on the SFR that we
can lookup. My concern was only to avoid calling a function
unnecessarily on !sama5d2 platforms.
>
> > reg = <0x00400000 0x100000>;
> > interrupts = <41 IRQ_TYPE_LEVEL_HIGH 2>;
> > clocks = <&uhphs_clk>, <&uhphs_clk>, <&uhpck>;
> >
>
> Bye,
> --
> Nicolas Ferre

--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering