linux-kernel - Re: [PATCH 2/5] arm64: dts: imx8mp: add noc node

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Date:   Wed, 6 Apr 2022 11:57:26 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     djakov@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, l.stach@...gutronix.de,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 2/5] arm64: dts: imx8mp: add noc node

Hi Peng,

Thank you for the patch.

On Wed, Apr 06, 2022 at 04:23:27PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Add i.MX8MP main noc node
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index e9e55fdd7652..be902f8155e8 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -1015,6 +1015,13 @@ gpu2d: gpu@...08000 {
>  			power-domains = <&pgc_gpu2d>;
>  		};
>  
> +		noc: interconnect@...00000 {
> +			compatible = "fsl,imx8mp-noc", "fsl,imx8m-noc", "syscon";
> +			reg = <0x32700000 0x100000>;

I can't comment on this, as the memory is documented as reserved in the
reference manual, but I have no reason not to trust you :-)

> +			clocks = <&clk IMX8MP_CLK_NOC>;

There's also a NOC_WRAPPER clock documented in the reference manual, and
also a NOC_IO clock. Are those related, do we need to care about them ?

> +			#interconnect-cells = <1>;
> +		};
> +
>  		aips4 {
>  			compatible = "fsl,aips-bus", "simple-bus";
>  			reg = <0x32c00000 0x400000>;

-- 
Regards,

Laurent Pinchart