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

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Date:   Wed, 6 Jul 2022 12:09:39 +0200
From:   Christian Marangi <ansuelsmth@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.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, Jonathan McDowell <noodles@...th.li>
Subject: Re: [PATCH 03/13] ARM: dts: qcom: add missing rpm regulators and
 cells for ipq8064

On Wed, Jul 06, 2022 at 10:34:16AM +0200, Krzysztof Kozlowski wrote:
> On 05/07/2022 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.
> > 
> > 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>;
> 
> Why adding these?
>

Fix dt warning, will split and put it in a separate commit.

> > +
> >  			rpmcc: clock-controller {
> >  				compatible = "qcom,rpmcc-ipq806x", "qcom,rpmcc";
> >  				#clock-cells = <1>;
> >  			};
> > +
> > +			smb208_regulators: regulators {
> > +				compatible = "qcom,rpm-smb208-regulators";
> > +				status = "okay";
> 
> Was the node disabled?
> 

smb208 is the normal and advised way to handle regulators on this
platform. Some device may want to not follow that and implement their
own regulator bypassing rpm so we add a status and on the current device
present upstream we set it disabled as it does use different regulators
implementation.

> > +
> > +				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 {
> 
> 
> Best regards,
> Krzysztof

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