From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean-Jacques Hiblot Subject: [PATCH v2 1/2] dt-bindings: leds: document the "power-supply" property Date: Mon, 15 Jul 2019 17:56:56 +0200 Message-ID: <20190715155657.22976-2-jjhiblot@ti.com> References: <20190715155657.22976-1-jjhiblot@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20190715155657.22976-1-jjhiblot@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: jacek.anaszewski@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, mark.rutland@arm.com, daniel.thompson@linaro.org Cc: dmurphy@ti.com, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Jean-Jacques Hiblot List-Id: devicetree@vger.kernel.org Most of the LEDs are powered by a voltage/current regulator. Describing it in the device-tree makes it possible for the LED core to enable/disable it when needed. Signed-off-by: Jean-Jacques Hiblot --- Documentation/devicetree/bindings/leds/common.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt index 70876ac11367..539e124b1457 100644 --- a/Documentation/devicetree/bindings/leds/common.txt +++ b/Documentation/devicetree/bindings/leds/common.txt @@ -61,6 +61,11 @@ Optional properties for child nodes: - panic-indicator : This property specifies that the LED should be used, if at all possible, as a panic indicator. +- power-supply : A voltage/current regulator used to to power the LED. When a + LED is turned off, the LED core disable its regulator. The + same regulator can power many LED (or other) devices. It is + turned off only when all of its users disabled it. + - trigger-sources : List of devices which should be used as a source triggering this LED activity. Some LEDs can be related to a specific device and should somehow indicate its state. E.g. USB 2.0 @@ -106,6 +111,7 @@ gpio-leds { label = "Status"; linux,default-trigger = "heartbeat"; gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>; + power-supply = <&led_regulator>; }; usb { -- 2.17.1