linux-kernel - Re: [PATCH v2 16/22] dt-bindings: rtc: qcom-pm8xxx: add nvmem-cell offset

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Message-ID: <Y+dQXlABqc/uzIXc@hovoldconsulting.com>
Date:   Sat, 11 Feb 2023 09:22:54 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Johan Hovold <johan+linaro@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        linux-arm-msm@...r.kernel.org, linux-rtc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v2 16/22] dt-bindings: rtc: qcom-pm8xxx: add nvmem-cell
 offset

On Fri, Feb 10, 2023 at 11:48:08PM +0100, Alexandre Belloni wrote:
> On 02/02/2023 16:54:42+0100, Johan Hovold wrote:
> > On many Qualcomm platforms the PMIC RTC control and time registers are
> > read-only so that the RTC time can not be updated. Instead an offset
> > needs be stored in some machine-specific non-volatile memory, which a
> > driver can take into account.
> > 
> > Add an 'offset' nvmem cell which can be used to store a 32-bit offset
> > from the Unix epoch so that the RTC time can be updated on such
> > platforms.
> > 
> > Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> > ---
> >  .../devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml     | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
> > index 21c8ea08ff0a..b95a69cc9ae0 100644
> > --- a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
> > +++ b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
> > @@ -40,6 +40,16 @@ properties:
> >      description:
> >        Indicates that the setting of RTC time is allowed by the host CPU.
> >  
> > +  nvmem-cells:
> > +    items:
> > +      - description:
> > +          four-byte nvmem cell holding a little-endian offset from the Unix
> > +          epoch representing the time when the RTC timer was last reset
> > +
> > +  nvmem-cell-names:
> > +    items:
> > +      - const: offset
> > +
> >    wakeup-source: true
> 
> The patch doesn't apply because this part of the context is not
> upstream. Can you rebase?

Ah, sorry about that. That's because of commit 51b3802e7960
("dt-bindings: rtc: qcom-pm8xxx: allow 'wakeup-source' property") which
is now in Linus's tree (and your rtc-fixes branch).

Do you still want me to rebase or do you prefer to handle the conflict
some other way?

Johan