Re: [PATCH v4 12/22] arm64: dts: mt8192: Add mmc device nodes - allen-kh.cheng

From: allen-kh.cheng <allen-kh.cheng@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: <Project_Global_Chrome_Upstream_Group@mediatek.com>,
	<devicetree@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-mediatek@lists.infradead.org>,
	Chen-Yu Tsai <wenst@chromium.org>,
	Ryder Lee <ryder.lee@kernel.org>,
	"Hui Liu" <hui.liu@mediatek.com>
Subject: Re: [PATCH v4 12/22] arm64: dts: mt8192: Add mmc device nodes
Date: Tue, 29 Mar 2022 14:40:52 +0800	[thread overview]
Message-ID: <080f3031bc05039ec73803886b92ec5614647e95.camel@mediatek.com> (raw)
In-Reply-To: <90324c6f-e3ef-5b18-8779-8a11ca67039b@gmail.com>

Hi Matthias,

On Thu, 2022-03-24 at 18:53 +0100, Matthias Brugger wrote:
> 
> On 18/03/2022 15:45, Allen-KH Cheng wrote:
> > Add mmc nodes for mt8192 SoC.
> > 
> > Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@collabora.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 34
> > +++++++++++++++++++++---
> >   1 file changed, 30 insertions(+), 4 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > index 6220d6962f58..2648f2847993 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > @@ -1150,10 +1150,36 @@
> >   			#clock-cells = <1>;
> >   		};
> >   
> > -		msdc: clock-controller@11f60000 {
> > -			compatible = "mediatek,mt8192-msdc";
> > -			reg = <0 0x11f60000 0 0x1000>;
> > -			#clock-cells = <1>;
> 
> We don't need the msdc_axi_wrap clock and that's why we delete the
> node, 
> correct? In that case we could only disable the node, as DTS should
> describe the 
> HW as it is. Please also add a line in the commit message explaining
> that.
> 
> Regards,
> Matthias
> 

Yes, in mt8192, mmc driver don't need msdc clock.

I will disable msdc node and mention it in commit message in next
version.

Thanks,
Allen

> > +		mmc0: mmc@11f60000 {
> > +			compatible = "mediatek,mt8192-mmc",
> > "mediatek,mt8183-mmc";
> > +			reg = <0 0x11f60000 0 0x1000>, <0 0x11f50000 0
> > 0x1000>;
> > +			interrupts = <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> > +			clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>,
> > +				 <&msdc_top CLK_MSDC_TOP_H_MST_0P>,
> > +				 <&msdc_top CLK_MSDC_TOP_SRC_0P>,
> > +				 <&msdc_top CLK_MSDC_TOP_P_CFG>,
> > +				 <&msdc_top CLK_MSDC_TOP_P_MSDC0>,
> > +				 <&msdc_top CLK_MSDC_TOP_AXI>,
> > +				 <&msdc_top
> > CLK_MSDC_TOP_AHB2AXI_BRG_AXI>;
> > +			clock-names = "source", "hclk", "source_cg",
> > "sys_cg",
> > +				      "pclk_cg", "axi_cg", "ahb_cg";
> > +			status = "disabled";
> > +		};
> > +
> > +		mmc1: mmc@11f70000 {
> > +			compatible = "mediatek,mt8192-mmc",
> > "mediatek,mt8183-mmc";
> > +			reg = <0 0x11f70000 0 0x1000>, <0 0x11c70000 0
> > 0x1000>;
> > +			interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> > +			clocks = <&topckgen CLK_TOP_MSDC30_1_SEL>,
> > +				 <&msdc_top CLK_MSDC_TOP_H_MST_1P>,
> > +				 <&msdc_top CLK_MSDC_TOP_SRC_1P>,
> > +				 <&msdc_top CLK_MSDC_TOP_P_CFG>,
> > +				 <&msdc_top CLK_MSDC_TOP_P_MSDC1>,
> > +				 <&msdc_top CLK_MSDC_TOP_AXI>,
> > +				 <&msdc_top
> > CLK_MSDC_TOP_AHB2AXI_BRG_AXI>;
> > +			clock-names = "source", "hclk", "source_cg",
> > "sys_cg",
> > +				      "pclk_cg", "axi_cg", "ahb_cg";
> > +			status = "disabled";
> >   		};
> >   
> >   		mfgcfg: clock-controller@13fbf000 {

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