linux-kernel - Re: [PATCH 03/13] ARM: dts: qcom: add missing rpm regulators and cells for ipq8064

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Message-ID: <1e261828-6f87-8e02-e560-01a47758471e@somainline.org>
Date:   Wed, 6 Jul 2022 15:02:44 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Christian Marangi <ansuelsmth@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jonathan McDowell <noodles@...th.li>
Subject: Re: [PATCH 03/13] ARM: dts: qcom: add missing rpm regulators and
 cells for ipq8064



On 5.07.2022 15:39, Christian Marangi wrote:
> Add cells definition for rpm node and add missing regulators for the 4
> regulator present on ipq8064. There regulators are controlled by rpm and
> to correctly works gsbi4_i2c require to be NEVER disabled or rpm will
> reject any regulator change request.
That sounds.. very weird for a RPM regulator..


> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> Tested-by: Jonathan McDowell <noodles@...th.li>
> ---
>  arch/arm/boot/dts/qcom-ipq8064.dtsi | 36 +++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-ipq8064.dtsi b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> index 1b4b72723ead..c0b05d2a2d6d 100644
> --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
> +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> @@ -844,10 +844,46 @@ rpm: rpm@...000 {
>  			clocks = <&gcc RPM_MSG_RAM_H_CLK>;
>  			clock-names = "ram";
>  
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
>  			rpmcc: clock-controller {
>  				compatible = "qcom,rpmcc-ipq806x", "qcom,rpmcc";
>  				#clock-cells = <1>;
>  			};
> +
> +			smb208_regulators: regulators {
Are you sure it is used on all ipq8064 boards? And with the same
voltage settings?

> +				compatible = "qcom,rpm-smb208-regulators";
> +				status = "okay";
They are enabled by default, as you are defining them here and
the status property is not overwritten anywhere else.

Konrad
> +
> +				smb208_s1a: s1a {
> +					regulator-min-microvolt = <1050000>;
> +					regulator-max-microvolt = <1150000>;
> +
> +					qcom,switch-mode-frequency = <1200000>;
> +				};
> +
> +				smb208_s1b: s1b {
> +					regulator-min-microvolt = <1050000>;
> +					regulator-max-microvolt = <1150000>;
> +
> +					qcom,switch-mode-frequency = <1200000>;
> +				};
> +
> +				smb208_s2a: s2a {
> +					regulator-min-microvolt = < 800000>;
> +					regulator-max-microvolt = <1250000>;
> +
> +					qcom,switch-mode-frequency = <1200000>;
> +				};
> +
> +				smb208_s2b: s2b {
> +					regulator-min-microvolt = < 800000>;
> +					regulator-max-microvolt = <1250000>;
> +
> +					qcom,switch-mode-frequency = <1200000>;
> +				};
> +			};
>  		};
>  
>  		tcsr: syscon@...00000 {