linux-kernel - Re: [PATCH V2 6/6] arm64: tegra: Add GTE nodes

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Date:   Thu, 16 Feb 2023 15:18:10 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Dipen Patel <dipenp@...dia.com>, thierry.reding@...il.com,
        jonathanh@...dia.com, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-gpio@...r.kernel.org,
        linus.walleij@...aro.org, devicetree@...r.kernel.org,
        linux-doc@...r.kernel.org, robh+dt@...nel.org,
        timestamp@...ts.linux.dev
Subject: Re: [PATCH V2 6/6] arm64: tegra: Add GTE nodes

On 14/02/2023 12:55, Dipen Patel wrote:
> Add GTE nodes for the tegra234. Also modify AON GTE nodes for the
> tegra194 to remove nvidia,slice property and add nvidia,gpio-controller
> propertyto specify AON GPIO controller node so that GTE driver can
> do namespace conversion between GPIO lines provided by the gpiolib
> framework and hardware timestamping engine subsystem.
> 
> Signed-off-by: Dipen Patel <dipenp@...dia.com>
> ---
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi |  3 +--
>  arch/arm64/boot/dts/nvidia/tegra234.dtsi | 19 +++++++++++++++++++
>  2 files changed, 20 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> index 4afcbd60e144..4c92850b1ec4 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> @@ -1363,7 +1363,6 @@
>  			reg = <0x3aa0000 0x10000>;
>  			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
>  			nvidia,int-threshold = <1>;
> -			nvidia,slices = <11>;
>  			#timestamp-cells = <1>;
>  			status = "okay";
>  		};
> @@ -1586,7 +1585,7 @@
>  			reg = <0xc1e0000 0x10000>;
>  			interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
>  			nvidia,int-threshold = <1>;
> -			nvidia,slices = <3>;
> +			nvidia,gpio-controller = <&gpio_aon>;
>  			#timestamp-cells = <1>;
>  			status = "okay";
>  		};
> diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
> index eaf05ee9acd1..4a87490c5fd4 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
> @@ -1086,6 +1086,15 @@
>  			clock-names = "fuse";
>  		};
>  
> +		hte_lic: hardware-timestamp@...0000 {
> +			compatible = "nvidia,tegra234-gte-lic";
> +			reg = <0x3aa0000 0x10000>;
> +			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> +			nvidia,int-threshold = <1>;
> +			#timestamp-cells = <1>;
> +			status = "okay";

Why do you need status? It's okay by default.

> +		};
> +
>  		hsp_top0: hsp@...0000 {
>  			compatible = "nvidia,tegra234-hsp", "nvidia,tegra194-hsp";
>  			reg = <0x03c00000 0xa0000>;
> @@ -1603,6 +1612,16 @@
>  			#mbox-cells = <2>;
>  		};
>  
> +		hte_aon: hardware-timestamp@...0000 {
> +			compatible = "nvidia,tegra234-gte-aon";
> +			reg = <0xc1e0000 0x10000>;
> +			interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> +			nvidia,int-threshold = <1>;
> +			nvidia,gpio-controller = <&gpio_aon>;
> +			#timestamp-cells = <1>;
> +			status = "okay";


Also here

Best regards,
Krzysztof