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From:   Rasmus Villemoes <rasmus.villemoes@prevas.dk>
To:     linux-rtc@vger.kernel.org,
        Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc:     linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>, Qiang Zhao <qiang.zhao@nxp.com>,
        Bruno Thomsen <bruno.thomsen@gmail.com>,
        Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Subject: [PATCH v2 1/3] dt-bindings: rtc: add reset-source property
Date:   Fri, 11 Dec 2020 22:56:09 +0100
Message-Id: <20201211215611.24392-2-rasmus.villemoes@prevas.dk>
In-Reply-To: <20201211215611.24392-1-rasmus.villemoes@prevas.dk>
References: <20201204092752.GE74177@piout.net>
 <20201211215611.24392-1-rasmus.villemoes@prevas.dk>
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Some RTCs, e.g. the pcf2127, can be used as a hardware watchdog. But
if the reset pin is not actually wired up, the driver exposes a
watchdog device that doesn't actually work.

Provide a standard binding that can be used to indicate that a given
RTC can perform a reset of the machine, similar to wakeup-source.

Suggested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
---
 Documentation/devicetree/bindings/rtc/rtc.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/rtc/rtc.yaml b/Documentation/devicetree/bindings/rtc/rtc.yaml
index ee237b2ed66a..b5e24dc24b0b 100644
--- a/Documentation/devicetree/bindings/rtc/rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/rtc.yaml
@@ -47,4 +47,9 @@ properties:
     description:
       Enables wake up of host system on alarm.
 
+  reset-source:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      The RTC is able to reset the machine.
+
 ...
-- 
2.23.0