linux-kernel - Re: [PATCH 2/2] dt-bindings: rtc: nxp,pcf8563: add hiz-output property

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Message-ID: <e8ae1f05-fe57-4fec-9e7e-1fccaed171e6@wolfvision.net>
Date: Tue, 30 Jan 2024 22:34:24 +0100
From: Javier Carrasco <javier.carrasco@...fvision.net>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: Alessandro Zummo <a.zummo@...ertech.it>, Rob Herring
 <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: rtc: nxp,pcf8563: add hiz-output
 property

Hello Alexandre,

On 26.10.23 11:56, Alexandre Belloni wrote:

> There is a pin named INTA, it can mux 4 different functions:
> 
>  - clock output
>  - battery mode indication
>  - interrupt
>  - HiZ
> 
> with pinmuxing, you can select which function you want for the pin. I'm
> not sure what is misused there.
> 
> Can you explain what is your actual use case? I'm starting to understand
> that what you want is simply disable clock out because you are not using
> the interrupt.
> 
> If we assume we are never going to use battery mode, then we could
> simply used the CCF for this like the other RTC drivers.
> 

Could you please point me to an RTC driver that uses the CCF for a
similar application? I am not sure what you mean with the battery mode
to make use of the HiZ, and I would like to push forward with this
functionality.

Thank you.

Best regards,
Javier Carrasco