Re: [RFC 12/13] arm64: dts: mt8192: Add apu tinysys

[Flora.Fu <flora.fu@mediatek.com>]

On Tue, 2021-10-26 at 17:18 +0200, AngeloGioacchino Del Regno wrote:
> Il 23/10/21 13:14, Flora Fu ha scritto:
> > Add node for APU tinysys.
> > 
> > Signed-off-by: Flora Fu <flora.fu@mediatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 36
> > ++++++++++++++++++++++++
> >   1 file changed, 36 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > index c505c6926839..8108084a3f6f 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > @@ -925,6 +925,42 @@
> >   			#iommu-cells = <1>;
> >   		};
> >   
> > +		apusys_rv@19001000 {
> > +			compatible = "mediatek,mt8192-apusys-rv";
> > +			reg = <0 0x19000000 0 0x1000>,
> > +			      <0 0x19001000 0 0x1000>,
> > +			      <0 0x19002000 0 0x10>;
> > +			reg-names = "apu_mbox",
> > +				    "md32_sysctrl",
> > +				    "apu_wdt";
> > +			mediatek,apusys-power = <&apusys_power>;
> 
> As said on the IOMMU commit, I think that apusys-power can be passed
> as a
> power domain here as well... also keeping in mind that the apuspm
> power
> domain is being used in both the IOMMU and in apusys-power already,
> so you
> could even pass only the apusys-power pd here, because apuspm would
> be
> already being turned on by the former...
> 
> ...unless there's any possibility to have some functionality with
> apuspm up
> but apusys-power down? From how it looks right now, that's not a
> thing.
> 
OK, we will check it.

> > +			power-domains = <&apuspm 0>;
> > +			iommus = <&iommu_apu IOMMU_PORT_APU_DATA>;
> > +			interrupts = <GIC_SPI 393 IRQ_TYPE_LEVEL_HIGH
> > 0>,
> > +				     <GIC_SPI 404 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> > +			interrupt-names = "apu_wdt",
> > +					  "mbox0_irq";
> > +			apu_ctrl {
> > +				compatible = "mediatek,apu-ctrl-rpmsg";
> > +				mtk,rpmsg-name = "apu-ctrl-rpmsg";
> 
> This is supposed to be "mediatek,rpmsg-name" instead... or it won't
> work.
> 
The latest kernel uses "mediatek,rpmsg-name" and I will update the
string in the next submission.

> > +			};
> > +
> > +			apu_pwr_tx {
> > +				compatible = "mediatek,apupwr-tx-
> > rpmsg";
> > +				mtk,rpmsg-name = "apupwr-tx-rpmsg";
> > +			};
> > +
> > +			apu_pwr_rx {
> > +				compatible = "mediatek,apupwr-rx-
> > rpmsg";
> > +				mtk,rpmsg-name = "apupwr-rx-rpmsg";
> > +			};
> > +
> > +			apu_mdw_rpmsg {
> > +				compatible = "mediatek,apu-mdw-rpmsg";
> > +				mtk,rpmsg-name = "apu-mdw-rpmsg";
> > +			};
> > +		};
> > +
> >   		apu_conn: apu_conn@19020000 {
> >   			compatible = "mediatek,mt8192-apu-conn",
> > "syscon";
> >   			reg = <0 0x19020000 0 0x1000>;
> >