linux-kernel - Re: [PATCH 03/17] ARM: dts: qcom: add missing rpm regulators and cells for ipq8064

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Message-ID: <YfmtHFfW00Qr2cLc@Ansuel-xps.localdomain>
Date:   Tue, 1 Feb 2022 22:58:52 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Jonathan McDowell <noodles@...th.li>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        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
Subject: Re: [PATCH 03/17] ARM: dts: qcom: add missing rpm regulators and
 cells for ipq8064

On Tue, Feb 01, 2022 at 02:39:20PM +0000, Jonathan McDowell wrote:
> On Mon, Jan 31, 2022 at 04:46:18PM -0600, Bjorn Andersson wrote:
> > On Mon 17 Jan 19:20 CST 2022, Ansuel Smith 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.
> > > 
> > 
> > Is the SMB208 mandatory on all ipq8064 designs, or should this be pushed
> > out to the device dts?
> 
> It's not; the RB3011 uses a different regulator (a TPS563900).
>

Fact is that that's a special case. We have 20 devices based on ipq806x
and they all have smb208 regulators.

Is the TPS563900 also controlled by rpm? 

Anyway should we use a dedicated dtsi to declare the correct regulators?

> > > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > > ---
> > >  arch/arm/boot/dts/qcom-ipq8064.dtsi | 35 +++++++++++++++++++++++++++++
> > >  1 file changed, 35 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/qcom-ipq8064.dtsi b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> > > index 094125605bea..824cf13dd037 100644
> > > --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
> > > +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> > > @@ -829,10 +829,45 @@ 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>;
> > >  			};
> > > +
> > > +			regulators {
> > > +				compatible = "qcom,rpm-smb208-regulators";
> > > +
> > > +				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 {
> > > -- 
> > > 2.33.1
> > > 
> 
> J.
> 
> -- 
> ... "There's no money, there's no weed. It's all been replaced by a fucking
>     big pile of corpses."  -- Lock, Stock and Two Smoking Barrels

-- 
	Ansuel