linux-kernel - Re: [PATCH 1/2] dt-bindings: rtc: nxp,pcf85063: add 'no-battery' property

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Message-ID: <Z/fZww9TDLhm66O3@lizhi-Precision-Tower-5810>
Date: Thu, 10 Apr 2025 10:46:27 -0400
From: Frank Li <Frank.li@....com>
To: Ciprian Costea <ciprianmarian.costea@....nxp.com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Alexander Stein <alexander.stein@...tq-group.com>,
	linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, s32@....com, imx@...ts.linux.dev,
	Christophe Lizzi <clizzi@...hat.com>,
	Alberto Ruiz <aruizrui@...hat.com>,
	Enric Balletbo <eballetb@...hat.com>,
	Eric Chanudet <echanude@...hat.com>,
	Larisa Grigore <larisa.grigore@....com>
Subject: Re: [PATCH 1/2] dt-bindings: rtc: nxp,pcf85063: add 'no-battery'
 property

On Thu, Apr 10, 2025 at 11:25:47AM +0300, Ciprian Costea wrote:
> From: Ciprian Marian Costea <ciprianmarian.costea@....nxp.com>
>
> In case the RTC is not linked to any battery, the oscillator will
> be stopped at startup, triggering a SW reset command for the PCF85063 RTC.
> For this setup, introduce 'no-battery' property which can be used to
> manually start the oscillator.
>
> Co-developed-by: Larisa Grigore <larisa.grigore@....com>
> Signed-off-by: Larisa Grigore <larisa.grigore@....com>
> Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@....nxp.com>
> ---
>  Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml
> index 2f892f8640d1..b342eb13fb2e 100644
> --- a/Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml
> +++ b/Documentation/devicetree/bindings/rtc/nxp,pcf85063.yaml
> @@ -36,6 +36,11 @@ properties:
>      enum: [7000, 12500]
>      default: 7000
>
> +  no-battery:
> +    description: Used in case the RTC is not linked to any battery so the
> +      oscillator is stopped at startup.
> +    type: boolean

Can you use optional regulator such as, vbat-supply?

Frank

> +
>    clock:
>      $ref: /schemas/clock/fixed-clock.yaml
>      description:
> --
> 2.45.2
>