Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755952AbbLDRb2 (ORCPT ); Fri, 4 Dec 2015 12:31:28 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:59935 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752772AbbLDRbZ (ORCPT ); Fri, 4 Dec 2015 12:31:25 -0500 From: Martyn Welch To: Arnd Bergmann , Greg Kroah-Hartman Cc: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , Kukjin Kim , Krzysztof Kozlowski , Martyn Welch , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Olof Johansson Subject: [PATCH 1/3] Device tree binding documentation for gpio-switch Date: Fri, 4 Dec 2015 17:31:13 +0000 Message-Id: <1449250275-23435-2-git-send-email-martyn.welch@collabora.co.uk> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1449250275-23435-1-git-send-email-martyn.welch@collabora.co.uk> References: <1449250275-23435-1-git-send-email-martyn.welch@collabora.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2542 Lines: 72 This patch adds documentation for the gpio-switch binding. This binding provides a mechanism to bind named links to gpio, with the primary purpose of enabling standardised access to switches that might be standard across a group of devices but implemented differently on each device. Signed-off-by: Martyn Welch --- .../devicetree/bindings/misc/gpio-switch.txt | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/gpio-switch.txt diff --git a/Documentation/devicetree/bindings/misc/gpio-switch.txt b/Documentation/devicetree/bindings/misc/gpio-switch.txt new file mode 100644 index 0000000..13528bd --- /dev/null +++ b/Documentation/devicetree/bindings/misc/gpio-switch.txt @@ -0,0 +1,47 @@ +Device-Tree bindings for gpio attached switches. + +This provides a mechanism to provide a named link to specified gpios. This can +be useful in instances such as when theres a need to monitor a switch, which is +common across a family of devices, but attached to different gpios and even +implemented in different ways on differnet devices. + +Required properties: + - compatible = "gpio-switch"; + +Each signal is represented as a sub-node of "gpio-switch". The naming of +sub-nodes is arbitrary. + +Required sub-node properties: + + - label: Name to be given to gpio switch. + - gpios: OF device-tree gpio specification. + +Optional sub-node properties: + + - read-only: Boolean flag to mark the gpio as read-only, i.e. the line + should not be driven by the host. + +Example nodes: + + gpio-switch { + compatible = "gpio-switch"; + + write-protect { + label = "write-protect"; + gpios = <&gpx3 0 GPIO_ACTIVE_LOW>; + read-only; + }; + + developer-switch { + label = "developer-switch"; + gpios = <&gpx1 3 GPIO_ACTIVE_HIGH>; + read-only; + }; + + recovery-switch { + label = "recovery-switch"; + gpios = <&gpx0 7 GPIO_ACTIVE_LOW>; + read-only; + }; + }; + -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/