linux-kernel - Re: [PATCH v3 03/18] ARM: dts: qcom: add missing rpm regulators and cells for ipq8064

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Date:   Tue, 12 Apr 2022 22:07:55 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan McDowell <noodles@...th.li>
Subject: Re: [PATCH v3 03/18] ARM: dts: qcom: add missing rpm regulators and
 cells for ipq8064

On Tue, Apr 12, 2022 at 02:46:39PM -0500, Bjorn Andersson wrote:
> On Wed 09 Mar 13:01 CST 2022, Ansuel Smith wrote:
> 
> > Add cells definition for rpm node
> 
> Why do we need the cells?
>

Mh I'm referring to address-cells and size-cells required for reg or dtb
will give warnings.

> > 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
> 
> Are you saying "...to correctly work, gsbi4_i2c must NEVER be disabled..."?
> 
> If so, that's good information, but how does it relate to this
> particular change?
> 

It doesn't but since it I had many days trying to debug the regulators
not working only to discover that the problem was with the pin, I thought
it was a good idea to add this info. Should I just drop it or should i
add some comments in the dts?

> Regards,
> Bjorn
> 
> > reject any regulator change request.
> > 
> > Signed-off-by: Ansuel Smith <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 b309bc0fbbcd..0938838a4af8 100644
> > --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
> > +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> > @@ -842,10 +842,46 @@ 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 {
> > +				compatible = "qcom,rpm-smb208-regulators";
> > +				status = "okay";
> > +
> > +				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 {
> > -- 
> > 2.34.1
> > 

-- 
	Ansuel