linux-kernel - Re: [PATCH v2] arm64: dts: rockchip: Add dtsi file for RK3399S SoC variant

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Message-Id: <D4STH4Z8LTHN.2X4BJJVACFSIS@cknow.org>
Date: Fri, 11 Oct 2024 10:00:17 +0200
From: "Diederik de Haas" <didi.debian@...ow.org>
To: "Dragan Simic" <dsimic@...jaro.org>,
 <linux-rockchip@...ts.infradead.org>
Cc: <heiko@...ech.de>, <linux-arm-kernel@...ts.infradead.org>,
 <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>, "Diederik
 de Haas" <didi.debian@...ow.org>
Subject: Re: [PATCH v2] arm64: dts: rockchip: Add dtsi file for RK3399S SoC
 variant

On Fri Oct 11, 2024 at 9:40 AM CEST, Dragan Simic wrote:
> Following the hierarchical representation of the SoC data that's been already
> established in the commit 296602b8e5f7 ("arm64: dts: rockchip: Move RK3399
> OPPs to dtsi files for SoC variants"), add new SoC dtsi file for the Rockchip
> RK3399S SoC, which is yet another variant of the Rockchip RK3399 SoC.
> ...
> The RK3399S variant is used in the Pine64 PinePhone Pro only, [1] whose board
> dts file included the necessary adjustments to the CPU DVFS OPPs.  This commit
> effectively moves those adjustments into the separate RK3399S SoC dtsi file,
> following the above-mentioned "encapsulation" approach.
> ...
> ---
> ...
>  .../dts/rockchip/rk3399-pinephone-pro.dts     |  23 +---
>  arch/arm64/boot/dts/rockchip/rk3399-s.dtsi    | 123 ++++++++++++++++++
>  2 files changed, 124 insertions(+), 22 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-s.dtsi
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> index 1a44582a49fb..eee6cfb6de01 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> @@ -13,7 +13,7 @@
>  #include <dt-bindings/input/gpio-keys.h>
>  #include <dt-bindings/input/linux-event-codes.h>
>  #include <dt-bindings/leds/common.h>
> -#include "rk3399.dtsi"
> +#include "rk3399-s.dtsi"
>  
>  / {
>  	model = "Pine64 PinePhone Pro";
> @@ -456,27 +456,6 @@ mpu6500@68 {
>  	};
>  };
>  
> -&cluster0_opp {
> -	opp04 {
> -		status = "disabled";
> -	};
> -
> -	opp05 {
> -		status = "disabled";
> -	};
> -};
> -
> -&cluster1_opp {
> -	opp06 {
> -		opp-hz = /bits/ 64 <1500000000>;
> -		opp-microvolt = <1100000 1100000 1150000>;
> -	};
> -
> -	opp07 {
> -		status = "disabled";
> -	};
> -};
> -
>  &io_domains {
>  	bt656-supply = <&vcc1v8_dvp>;
>  	audio-supply = <&vcca1v8_codec>;
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-s.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-s.dtsi
> new file mode 100644
> index 000000000000..e54f451af9f3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-s.dtsi
> @@ -0,0 +1,123 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2016-2017 Fuzhou Rockchip Electronics Co., Ltd
> + */
> +
> +#include "rk3399-base.dtsi"
> +
> +/ {
> +	cluster0_opp: opp-table-0 {
> +		compatible = "operating-points-v2";
> +		opp-shared;
> +
> +		opp00 {
> +			opp-hz = /bits/ 64 <408000000>;
> +			opp-microvolt = <825000 825000 1250000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp01 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt = <825000 825000 1250000>;
> +		};
> +		opp02 {
> +			opp-hz = /bits/ 64 <816000000>;
> +			opp-microvolt = <850000 850000 1250000>;
> +		};

Is there a reason why there isn't a line separator between the various
opp nodes? Normally there is one between nodes.
Note that in rk3588-opp.dtsi there are no separator lines between the
opp nodes, while they do exist between other nodes.
And in rk356x.dtsi the opp nodes do have a separator line.

Cheers,
  Diederik

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