linux-kernel - Re: [PATCH 1/2] arm64: dts: qcom: pm8450a: add rtc node

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Date:   Tue, 13 Dec 2022 13:18:55 -0500
From:   Eric Chanudet <echanude@...hat.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andrew Halaney <ahalaney@...hat.com>,
        Brian Masney <bmasney@...hat.com>
Subject: Re: [PATCH 1/2] arm64: dts: qcom: pm8450a: add rtc node

On Tue, Dec 13, 2022 at 04:18:00AM +0300, Dmitry Baryshkov wrote:
> >diff --git a/arch/arm64/boot/dts/qcom/pm8450a.dtsi b/arch/arm64/boot/dts/qcom/pm8450a.dtsi
> >index 34fc72896761..af761dbfbc66 100644
> >--- a/arch/arm64/boot/dts/qcom/pm8450a.dtsi
> >+++ b/arch/arm64/boot/dts/qcom/pm8450a.dtsi
> >@@ -13,6 +13,14 @@ pm8450a: pmic@0 {
> > 		#address-cells = <1>;
> > 		#size-cells = <0>;
> > 
> >+		rtc@...0 {
> >+			compatible = "qcom,pm8941-rtc";
> >+			reg = <0x6000>;
> >+			reg-names = "rtc", "alarm";
> >+			interrupts = <0x0 0x61 0x1 IRQ_TYPE_NONE>;
> 
> 
> 0x60?

Checking downstream it uses 0x61 for the ppid. This is also the case
for all other descriptions of that RTC I could find. On the other hand,
that does not describe the "alarm" register bank at 0x6100.
Should it be added, if anything to match reg-names?

I tried a quick test of the alarm on sa8540p-ride:
$ echo $(date '+%s' -d '+ 10 seconds') > /sys/class/rtc/rtc0/wakealarm
It logged the interrupt:
172:          3          0          0          0          0          0          0          0  pmic_arb 101777441 Edge      pm8xxx_rtc_alarm

-- 
Eric Chanudet