linux-kernel - Re: [PATCH] ARM: dts: imx6sx: add pu power domain support

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Message-ID: <20180125153025.GC24622@b29396-OptiPlex-7040>
Date:   Thu, 25 Jan 2018 23:30:25 +0800
From:   Dong Aisheng <dongas86@...il.com>
To:     Anson Huang <Anson.Huang@....com>
Cc:     shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com,
        robh+dt@...nel.org, aisheng.dong@....com, mark.rutland@....com,
        linux@...linux.org.uk, Linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: imx6sx: add pu power domain support

On Tue, Jan 23, 2018 at 11:12:23PM +0800, Anson Huang wrote:
> Add PU power domain support, GPU is the only
> module inside PU power domain, and PU power
> is supplied by LDO_SOC.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  arch/arm/boot/dts/imx6sx.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
> index fd78793..42ef4c6 100644
> --- a/arch/arm/boot/dts/imx6sx.dtsi
> +++ b/arch/arm/boot/dts/imx6sx.dtsi
> @@ -188,6 +188,7 @@
>  				 <&clks IMX6SX_CLK_GPU>,
>  				 <&clks IMX6SX_CLK_GPU>;
>  			clock-names = "bus", "core", "shader";
> +			power-domains = <&pd_pu>;
>  		};
>  
>  		dma_apbh: dma-apbh@...4000 {
> @@ -767,6 +768,13 @@
>  					#address-cells = <1>;
>  					#size-cells = <0>;
>  
> +					pd_pu: power-domain@1 {
> +						reg = <1>;
> +						#power-domain-cells = <0>;
> +						power-supply = <&reg_soc>;

I wonder we may not need this as it's a non-stop domain
just like we did for arm domain, right?

Otherwise, the patch looks fine to me.

Acked-by: Dong Aisheng <aisheng.dong@....com>

Regards
Dong Aisheng

> +						clocks = <&clks IMX6SX_CLK_GPU>;
> +					};
> +
>  					pd_pci: power-domain@3 {
>  						reg = <3>;
>  						#power-domain-cells = <0>;
> -- 
> 2.7.4
>