From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753867AbbGAJoa (ORCPT ); Wed, 1 Jul 2015 05:44:30 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:37816 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753767AbbGAJmn (ORCPT ); Wed, 1 Jul 2015 05:42:43 -0400 From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Cc: Mark Brown , linux-acpi@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-pwm@vger.kernel.org, "Rafael J. Wysocki" , alsa-devel@alsa-project.org, Tomeu Vizoso , Kumar Gala , Ian Campbell , Rob Herring , Pawel Moll , Mark Rutland Subject: [PATCH v2 06/12] backlight: Document consumers of backlight nodes Date: Wed, 1 Jul 2015 11:41:01 +0200 Message-Id: <1435743667-11987-7-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.1 In-Reply-To: <1435743667-11987-1-git-send-email-tomeu.vizoso@collabora.com> References: <1435743667-11987-1-git-send-email-tomeu.vizoso@collabora.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a small note that makes explicit that properties named 'backlight' contain phandles to backlight nodes. This is needed so that we can automatically extract dependencies on backlight devices by assuming that a property with that name contains a phandle to such a device. Signed-off-by: Tomeu Vizoso --- Changes in v2: - Document that consumers of backlight devices can use the 'backlight' property to hold a phandle to the backlight device. .../bindings/video/backlight/backlight.txt | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/backlight/backlight.txt diff --git a/Documentation/devicetree/bindings/video/backlight/backlight.txt b/Documentation/devicetree/bindings/video/backlight/backlight.txt new file mode 100644 index 0000000..309949d --- /dev/null +++ b/Documentation/devicetree/bindings/video/backlight/backlight.txt @@ -0,0 +1,22 @@ +Specifying backlight information for devices +============================================ + +Backlight user nodes +-------------------- + +Nodes such as display panels that refer to backlight devices can do so by simply having a property named 'backlight' that contains a phandle to a backlight node. + +Example: + + backlight: backlight { + compatible = "gpio-backlight"; + gpios = <&gpio3 4 GPIO_ACTIVE_HIGH>; + }; + + [...] + + panel: panel { + compatible = "cptt,claa101wb01"; + + backlight = <&backlight>; + }; -- 2.4.1