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

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Date:   Fri, 20 May 2022 11:30:34 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Rex-BC Chen <rex-bc.chen@...iatek.com>
Cc:     mturquette@...libre.com, sboyd@...nel.org, matthias.bgg@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        p.zabel@...gutronix.de, angelogioacchino.delregno@...labora.com,
        chun-jie.chen@...iatek.com, wenst@...omium.org,
        runyang.chen@...iatek.com, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v7 16/19] arm64: dts: mediatek: Add infra #reset-cells
 property for MT8195

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

>  			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
> 
>