linux-kernel - RE: [PATCH 19/20] arm64: dts: fsd: Add MFC related DT enteries

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Date:   Tue, 5 Jul 2022 17:19:26 +0530
From:   "Smitha T Murthy" <smitha.t@...sung.com>
To:     "'Krzysztof Kozlowski'" <krzysztof.kozlowski@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Cc:     <m.szyprowski@...sung.com>, <andrzej.hajda@...el.com>,
        <mchehab@...nel.org>, <hverkuil-cisco@...all.nl>,
        <ezequiel@...guardiasur.com.ar>, <jernej.skrabec@...il.com>,
        <benjamin.gaignard@...labora.com>, <stanimir.varbanov@...aro.org>,
        <dillon.minfei@...il.com>, <david.plowman@...pberrypi.com>,
        <mark.rutland@....com>, <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <andi@...zian.org>, <alim.akhtar@...sung.com>,
        <aswani.reddy@...sung.com>, <pankaj.dubey@...sung.com>,
        <linux-fsd@...la.com>
Subject: RE: [PATCH 19/20] arm64: dts: fsd: Add MFC related DT enteries



> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
> Sent: Tuesday, May 17, 2022 7:32 PM
> To: Smitha T Murthy <smitha.t@...sung.com>; linux-arm-
> kernel@...ts.infradead.org; linux-media@...r.kernel.org; linux-
> kernel@...r.kernel.org; devicetree@...r.kernel.org
> Cc: m.szyprowski@...sung.com; andrzej.hajda@...el.com;
> mchehab@...nel.org; hverkuil-cisco@...all.nl;
> ezequiel@...guardiasur.com.ar; jernej.skrabec@...il.com;
> benjamin.gaignard@...labora.com; stanimir.varbanov@...aro.org;
> dillon.minfei@...il.com; david.plowman@...pberrypi.com;
> mark.rutland@....com; robh+dt@...nel.org; krzk+dt@...nel.org;
> andi@...zian.org; alim.akhtar@...sung.com; aswani.reddy@...sung.com;
> pankaj.dubey@...sung.com; linux-fsd@...la.com
> Subject: Re: [PATCH 19/20] arm64: dts: fsd: Add MFC related DT enteries
> 
> On 17/05/2022 14:55, Smitha T Murthy wrote:
> > Add MFC DT node and reserve memory node for MFC usage.
> >
> > Cc: linux-fsd@...la.com
> > Signed-off-by: Smitha T Murthy <smitha.t@...sung.com>
> > ---
> >  arch/arm64/boot/dts/tesla/fsd-evb.dts |  8 ++++++++
> >  arch/arm64/boot/dts/tesla/fsd.dtsi    | 22 ++++++++++++++++++++++
> >  2 files changed, 30 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> > b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> > index 5af560c1b5e6..36f6b013ce99 100644
> > --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> > +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> > @@ -37,3 +37,11 @@
> >  &serial_0 {
> >  	status = "okay";
> >  };
> > +
> > +&clock_mfc {
> > +	status = "okay";
> > +};
> > +
> > +&mfc_0 {
> > +	status = "okay";
> > +};
> 
> Labels are ordered by name.
> 

Ok, I will re-order.

> > diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi
> > b/arch/arm64/boot/dts/tesla/fsd.dtsi
> > index 9a652abcbcac..434ae75421d8 100644
> > --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> > +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> > @@ -249,6 +249,18 @@
> >  		#clock-cells = <0>;
> >  	};
> >
> > +	reserved-memory {
> > +		#address-cells = <2>;
> > +		#size-cells = <2>;
> > +		ranges;
> > +
> > +		mfc_left: region@...00000 {
> > +			compatible = "shared-dma-pool";
> > +			no-map;
> > +			reg = <0 0x84000000 0 0x8000000>;
> > +		};
> > +	};
> > +
> >  	soc: soc@0 {
> >  		compatible = "simple-bus";
> >  		#address-cells = <2>;
> > @@ -748,6 +760,16 @@
> >  			clocks = <&fin_pll>, <&clock_imem
> IMEM_MCT_PCLK>;
> >  			clock-names = "fin_pll", "mct";
> >  		};
> > +
> > +		mfc_0: mfc0@...80000 {
> 
> Generic node names, so mfc.
> 

Ok I will change.

> > +			compatible = "samsung,mfc-v12";
> > +			reg = <0x0 0x12880000 0x0 0x10000>;
> > +			interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>;
> > +			clock-names = "mfc";
> > +			clocks = <&clock_mfc MFC_MFC_IPCLKPORT_ACLK>;
> > +			memory-region = <&mfc_left>;
> > +			status = "disabled";
> 
> Why exactly this is disabled? Usually we disable nodes which needs
> resources from the boards, but this is not the case here. Unless it is?
> 

I will change this in next patch series.

Regards,
Smitha

> > +		};
> >  	};
> >  };
> >
> 
> 
> Best regards,
> Krzysztof