linux-kernel - Re: [PATCH V2 5/6] arm64: dts: qcom: ipq9574: Add RPM related nodes

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Message-ID: <12d23d88-6f42-09ea-3f26-e1b7a0878767@linaro.org>
Date:   Fri, 17 Feb 2023 15:50:34 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Devi Priya <quic_devipriy@...cinc.com>, agross@...nel.org,
        andersson@...nel.org, lgirdwood@...il.com, broonie@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     quic_srichara@...cinc.com, quic_gokulsri@...cinc.com,
        quic_sjaganat@...cinc.com, quic_kathirav@...cinc.com,
        quic_arajkuma@...cinc.com, quic_anusha@...cinc.com,
        quic_ipkumar@...cinc.com
Subject: Re: [PATCH V2 5/6] arm64: dts: qcom: ipq9574: Add RPM related nodes



On 17.02.2023 15:20, Devi Priya wrote:
> Add RPM Glink, RPM message RAM and SMPA1 regulator
> nodes to support frequency scaling on IPQ9574
> 
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
> ---
>  Changes in V2:
> 	- Splitted the RPM and CPU Freq changes to individual patches
> 	- Moved the regulators node to Board DT
> 	- Dropped the regulator-always-on property
> 	- Updated the compatible in regulators node with the existing
> 	  mp5496 compatible
> 
>  arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts | 11 +++++++++++
>  arch/arm64/boot/dts/qcom/ipq9574.dtsi        | 17 +++++++++++++++++
>  2 files changed, 28 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts b/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
> index 21b53f34ce84..8a6caaeb0c4b 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
> +++ b/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
> @@ -57,6 +57,17 @@
>  	status = "okay";
>  };
>  
> +&rpm_requests {
> +	regulators {
> +		compatible = "qcom,rpm-mp5496-regulators";
> +
> +		ipq9574_s1: s1 {
> +			regulator-min-microvolt = <587500>;
> +			regulator-max-microvolt = <1075000>;
> +		};
> +	};
> +};
This belongs in a separate patch.

> +
>  &sdhc_1 {
>  	pinctrl-0 = <&sdc_default_state>;
>  	pinctrl-names = "default";
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> index d20f3c7383f5..2f300cbab93e 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> @@ -133,6 +133,11 @@
>  		#size-cells = <2>;
>  		ranges;
>  
> +		rpm_msg_ram: rpm@...00 {
Since this is a part of the MMIO region and not a part of DRAM,
we generally put this node under /soc with the compatible of
qcom,rpm-msg-ram and without no-map.

And the node name then should be sram@.

> +			reg = <0x0 0x00060000 0x0 0x6000>;
> +			no-map;
> +		};
> +
>  		tz_region: tz@...00000 {
>  			reg = <0x0 0x4a600000 0x0 0x400000>;
>  			no-map;
> @@ -768,6 +773,18 @@
>  		};
>  	};
>  
> +	rpm-glink {
Alphabetically this should come before /soc.

Konrad
> +		compatible = "qcom,glink-rpm";
> +		interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
> +		qcom,rpm-msg-ram = <&rpm_msg_ram>;
> +		mboxes = <&apcs_glb 0>;
> +
> +		rpm_requests: glink-channel {
> +			compatible = "qcom,rpm-ipq9574";
> +			qcom,glink-channels = "rpm_requests";
> +		};
> +	};
> +
>  	timer {
>  		compatible = "arm,armv8-timer";
>  		interrupts = <GIC_PPI 2 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,