From: "Marek Behún" <kabel@kernel.org>
To: devicetree@vger.kernel.org, linux-leds@vger.kernel.org,
pavel@ucw.cz, Andrew Lunn <andrew@lunn.ch>
Cc: robh+dt@kernel.org,
"Jacek Anaszewski" <jacek.anaszewski@gmail.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
"Marek Behún" <kabel@kernel.org>
Subject: [PATCH 2/3] dt-bindings: leds: Add `excludes` property
Date: Wed, 13 Oct 2021 22:44:23 +0200 [thread overview]
Message-ID: <20211013204424.10961-2-kabel@kernel.org> (raw)
In-Reply-To: <20211013204424.10961-1-kabel@kernel.org>
Some RJ-45 connectors have LEDs wired in the following way:
LED1
+--|>|--+
| |
A---+--|<|--+---B
LED2
With + on A and - on B, LED1 is ON and LED2 is OFF. Inverting the
polarity turns LED1 OFF and LED2 ON.
So these LEDs exclude each other.
Add new `excludes` property to the LED binding. The property is a
phandle-array to all the other LEDs that are excluded by this LED.
Signed-off-by: Marek Behún <kabel@kernel.org>
---
Documentation/devicetree/bindings/leds/common.yaml | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
index a19acc781e89..03759d2e125a 100644
--- a/Documentation/devicetree/bindings/leds/common.yaml
+++ b/Documentation/devicetree/bindings/leds/common.yaml
@@ -59,6 +59,14 @@ properties:
deprecated - use 'function' and 'color' properties instead.
function-enumerator has no effect when this property is present.
+ excludes:
+ description:
+ List of LEDs that are excluded by this LED: if this LED is ON, the others
+ must be OFF. This is mostly the case when there are two LEDs connected in
+ parallel, but inversely: inverting the polarity of the source turns one
+ LED ON while the other OFF. There are RJ-45 connectors with such wiring.
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+
default-state:
description:
The initial state of the LED. If the LED is already on or off and the
--
2.32.0
next prev parent reply other threads:[~2021-10-13 20:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 20:44 [PATCH 1/3] dt-bindings: leds: Deprecate `linux,default-trigger` property Marek Behún
2021-10-13 20:44 ` Marek Behún [this message]
2021-10-13 22:20 ` [PATCH 2/3] dt-bindings: leds: Add `excludes` property Rob Herring
2021-10-14 10:29 ` Pavel Machek
2021-10-14 10:43 ` Marek Behún
2021-10-14 11:30 ` Alexander Dahl
2021-10-14 11:58 ` Marek Behún
2021-10-13 20:44 ` [PATCH 3/3] dt-bindings: leds: Allow for multiple colors in the `color` property Marek Behún
2021-10-26 20:44 ` Rob Herring
2021-10-26 20:39 ` [PATCH 1/3] dt-bindings: leds: Deprecate `linux,default-trigger` property Rob Herring
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