From: Rob Herring <robh@kernel.org>
To: Flavio Suligoi <f.suligoi@asem.it>
Cc: Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-rtc@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: rtc: add battery-low-hw-alarm property
Date: Sat, 06 Apr 2019 01:07:13 -0500 [thread overview]
Message-ID: <5ca84214.1c69fb81.e3ace.21e5@mx.google.com> (raw)
In-Reply-To: <1554303165-24813-1-git-send-email-f.suligoi@asem.it>
On Wed, Apr 03, 2019 at 04:52:44PM +0200, Flavio Suligoi wrote:
> Some RTC devices have a battery-low automatic detection circuit.
> The battery-low event is usually reported with:
>
> - a bit change in a RTC status register
> - a hw signaling (generally using an interrupt generation), changing
> the hw level of a specific pin;
>
> The new property "battery-low-hw-alarm" enable the RTC to generate the
> hw signaling in case of battery-low event.
>
> Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
> ---
> Documentation/devicetree/bindings/rtc/rtc.txt | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt
> index a97fc6a..f93a44d 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc.txt
> @@ -31,6 +31,9 @@ below.
> expressed in femto Farad (fF).
> The default value shall be listed (if optional),
> and likewise all valid values.
> +- battery-low-hw-alarm : Enable the "battery-low" output pin. This function
> + is available on the following devices:
> + - pcf2127 - pin used for alarm: INTn
Boolean? If there's cases where which pin is selectable, then we'd need
this to take a value. Not sure how likely that is?
Rob
next prev parent reply other threads:[~2019-04-06 6:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 14:52 [PATCH 1/2] dt-bindings: rtc: add battery-low-hw-alarm property Flavio Suligoi
2019-04-03 14:52 ` [PATCH 2/2] rtc: pcf2127: add battery-low INTn generation Flavio Suligoi
2019-04-03 15:08 ` Alexandre Belloni
2019-04-03 15:14 ` Flavio Suligoi
2019-04-03 15:31 ` Alexandre Belloni
2019-04-03 15:49 ` Flavio Suligoi
2019-04-03 15:56 ` Alexandre Belloni
2019-04-03 16:09 ` Flavio Suligoi
2019-04-03 16:15 ` Alexandre Belloni
2019-04-03 16:20 ` Flavio Suligoi
2019-04-03 14:57 ` [PATCH 1/2] dt-bindings: rtc: add battery-low-hw-alarm property Alexandre Belloni
2019-04-03 15:06 ` Flavio Suligoi
2019-04-03 15:28 ` Alexandre Belloni
2019-04-03 15:32 ` Flavio Suligoi
2019-04-06 6:07 ` Rob Herring [this message]
2019-04-06 12:55 ` Alexandre Belloni
2019-04-08 7:22 ` Flavio Suligoi
2019-04-09 1:18 ` Rob Herring
2019-04-10 8:04 ` Flavio Suligoi
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