linux-kernel - Re: [PATCH v7 16/19] arm64: dts: mediatek: Add infra #reset-cells property for MT8195

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Message-ID: <39132f3173df651ea0e2d7ea399008b9ba8d1892.camel@mediatek.com>
Date:   Mon, 23 May 2022 13:11:01 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     "Nícolas F. R. A. Prado" <nfraprado@...labora.com>
CC:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        Chun-Jie Chen (陳浚桀) 
        <Chun-Jie.Chen@...iatek.com>,
        "wenst@...omium.org" <wenst@...omium.org>,
        Runyang Chen (陈润洋) 
        <Runyang.Chen@...iatek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v7 16/19] arm64: dts: mediatek: Add infra #reset-cells
 property for MT8195

On Fri, 2022-05-20 at 23:30 +0800, Nícolas F. R. A. Prado wrote:
> Hi Rex,
> 
> On Thu, May 19, 2022 at 08:55:24PM +0800, Rex-BC Chen wrote:
> > We will use mediatek clock reset as infracfg_ao reset instead of
> > ti-syscon. To support this, remove property of ti reset and add
> > property of #reset-cells for mediatek clock reset.
> > 
> > Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > ---
> >  arch/arm64/boot/dts/mediatek/mt8195.dtsi | 13 +------------
> >  1 file changed, 1 insertion(+), 12 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > index b57e620c2c72..8e5ac11b19f1 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > @@ -10,7 +10,6 @@
> >  #include <dt-bindings/interrupt-controller/irq.h>
> >  #include <dt-bindings/phy/phy.h>
> >  #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
> > -#include <dt-bindings/reset/ti-syscon.h>
> >  
> >  / {
> >  	compatible = "mediatek,mt8195";
> > @@ -295,17 +294,7 @@
> >  			compatible = "mediatek,mt8195-infracfg_ao",
> > "syscon", "simple-mfd";
> 
> I believe the 'simple-mfd' compatible was added only to make the
> reset-controller subnode probe (at least this was the case for
> mt8192), so it
> might make sense to drop it here as well.
> 
> Thanks,
> Nícolas
> 

Hello Nícolas,
ok, I will drop 'simple-mfd' in next version.

BRs,
Rex

> >  			reg = <0 0x10001000 0 0x1000>;
> >  			#clock-cells = <1>;
> > -
> > -			infracfg_rst: reset-controller {
> > -				compatible = "ti,syscon-reset";
> > -				#reset-cells = <1>;
> > -				ti,reset-bits = <
> > -					0x140 18 0x144 18 0 0
> > (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* pcie */
> > -					0x120 0  0x124 0  0 0
> > (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* thermal */
> > -					0x730 10 0x734 10 0 0
> > (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* thermal */
> > -					0x150 5  0x154 5  0 0
> > (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* svs gpu */
> > -				>;
> > -			};
> > +			#reset-cells = <1>;
> >  		};
> >  
> >  		pericfg: syscon@...03000 {
> > -- 
> > 2.18.0
> > 
> >