linux-kernel - Re: [PATCH V2 13/16] arm64: tegra: Enable PCIe slots in P2972-0000 board

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Date:   Mon, 15 Apr 2019 17:12:35 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     bhelgaas@...gle.com, robh+dt@...nel.org, mark.rutland@....com,
        jonathanh@...dia.com, kishon@...com, catalin.marinas@....com,
        will.deacon@....com, lorenzo.pieralisi@....com,
        jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        mperttunen@...dia.com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kthota@...dia.com, mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V2 13/16] arm64: tegra: Enable PCIe slots in P2972-0000
 board

On Fri, Apr 05, 2019 at 01:24:40AM +0530, Vidya Sagar wrote:
> Enable PCIe controller nodes to enable respective PCIe slots on
> P2972-0000 board. Following is the ownership of slots by different
> PCIe controllers.
> Controller-0 : M.2 Key-M slot
> Controller-1 : On-board Marvell eSATA controller
> Controller-3 : M.2 Key-E slot
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> ---
> Changes since [v1]:
> * Dropped 'pcie-' from phy-names property strings
> 
>  arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi     |  2 +-
>  arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts | 50 ++++++++++++++++++++++
>  2 files changed, 51 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
> index 246c1ebbd055..13263529125b 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
> @@ -191,7 +191,7 @@
>  						regulator-boot-on;
>  					};
>  
> -					sd3 {
> +					vdd_1v8ao: sd3 {
>  						regulator-name = "VDD_1V8AO";
>  						regulator-min-microvolt = <1800000>;
>  						regulator-max-microvolt = <1800000>;
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts b/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
> index b62e96945846..82eb30bceaa6 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
> +++ b/arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts
> @@ -169,4 +169,54 @@
>  			};
>  		};
>  	};
> +
> +	pcie@...80000 {
> +		status = "okay";
> +
> +		vddio-pex-ctl-supply = <&vdd_1v8ao>;
> +
> +		phys = <&p2u_2>,
> +		       <&p2u_3>,
> +		       <&p2u_4>,
> +		       <&p2u_5>;

You can use multiple entries on a single line, especially if they are
this short.

> +		phy-names = "p2u-0", "p2u-1", "p2u-2",
> +			    "p2u-3";

Same here.

> +	};
> +
> +	pcie@...00000 {
> +		status = "okay";
> +
> +		vddio-pex-ctl-supply = <&vdd_1v8ao>;
> +
> +		phys = <&p2u_0>;
> +		phy-names = "p2u-0";
> +	};
> +
> +	pcie@...40000 {
> +		status = "okay";
> +
> +		vddio-pex-ctl-supply = <&vdd_1v8ao>;
> +
> +		phys = <&p2u_7>;
> +		phy-names = "p2u-0";
> +	};
> +
> +	pcie@...a0000 {
> +		status = "disabled";
> +
> +		vddio-pex-ctl-supply = <&vdd_1v8ao>;
> +
> +		phys = <&p2u_12>,
> +		       <&p2u_13>,
> +		       <&p2u_14>,
> +		       <&p2u_15>,
> +		       <&p2u_16>,
> +		       <&p2u_17>,
> +		       <&p2u_18>,
> +		       <&p2u_19>;
> +
> +		phy-names = "p2u-0", "p2u-1", "p2u-2",
> +			    "p2u-3", "p2u-4", "p2u-5",
> +			    "p2u-6", "p2u-7";

And here.

Thierry

> +	};
>  };
> -- 
> 2.7.4
> 

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