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From: Alexandre Belloni <>
To: Javier Carrasco <>
Cc: Alessandro Zummo <>,
	Rob Herring <>,
	Krzysztof Kozlowski <>,
	Conor Dooley <>,,,
Subject: Re: [PATCH 2/2] dt-bindings: rtc: nxp,pcf8563: add hiz-output property
Date: Thu, 26 Oct 2023 12:21:46 +0200	[thread overview]
Message-ID: <202310261021467b56f131@mail.local> (raw)
In-Reply-To: <>

On 26/10/2023 12:13:23+0200, Javier Carrasco wrote:
> I want to model the INTA pin as a clock source that only should run in
> sleep mode because its clock is only used in that mode. Therefore I want
> the pin to stay in hi-Z during normal operation.

Can you disclose what is the user of the clock, do you have a driver for
this device?

> I do not want to get any interrupts from the INTA pin and the battery
> mode indication is not relevant for me either. I do not know the CCF
> mechanism in other RTCs though, but I think that the hi-Z mode
> accomplishes exactly what I described.The assumption about the battery
> mode is therefore beyond my knowledge, but my first reaction is that we
> already have the hi-Z for that.
> So in the end I just need a mechanism to configure INTA as hi-Z, which
> the driver still does not support. There is another application where
> the clock output is not required even though it is physically connected,
> so hi-Z is again an interesting mode and the battery mode would be
> available if it ever becomes relevant for anyone.

Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering

  reply	other threads:[~2023-10-26 10:21 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-25 16:21 [PATCH 0/2] rtc: pcf85363: add support for high-impedance output Javier Carrasco
2023-10-25 16:21 ` [PATCH 1/2] " Javier Carrasco
2023-10-25 16:21 ` [PATCH 2/2] dt-bindings: rtc: nxp,pcf8563: add hiz-output property Javier Carrasco
2023-10-25 22:23   ` Alexandre Belloni
2023-10-25 22:30     ` Javier Carrasco
2023-10-25 23:23       ` Javier Carrasco
2023-10-26  0:50         ` Alexandre Belloni
2023-10-26  9:41           ` Javier Carrasco
2023-10-26  9:56             ` Alexandre Belloni
2023-10-26 10:13               ` Javier Carrasco
2023-10-26 10:21                 ` Alexandre Belloni [this message]
2023-10-26 10:35                   ` Javier Carrasco
2024-01-30 21:34               ` Javier Carrasco

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