From patchwork Tue Jul 12 19:36:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 9226055 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 879BE604DB for ; Tue, 12 Jul 2016 19:37:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7586D2756B for ; Tue, 12 Jul 2016 19:37:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 69E8F27D85; Tue, 12 Jul 2016 19:37:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 27F7B2756B for ; Tue, 12 Jul 2016 19:37:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751402AbcGLTgn (ORCPT ); Tue, 12 Jul 2016 15:36:43 -0400 Received: from down.free-electrons.com ([37.187.137.238]:52380 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750829AbcGLTgl (ORCPT ); Tue, 12 Jul 2016 15:36:41 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id B165F30E; Tue, 12 Jul 2016 21:36:34 +0200 (CEST) Received: from localhost (unknown [88.191.26.124]) by mail.free-electrons.com (Postfix) with ESMTPSA id 82A6A1CD; Tue, 12 Jul 2016 21:36:34 +0200 (CEST) From: Alexandre Belloni To: Dmitry Torokhov Cc: Jonathan Cameron , linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Alexandre Belloni , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v4 1/2] input: adc-keys: add DT binding documentation Date: Tue, 12 Jul 2016 21:36:25 +0200 Message-Id: <1468352186-14190-1-git-send-email-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 2.8.1 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add documentation for ADC keys Signed-off-by: Alexandre Belloni --- Cc: Rob Herring Cc: devicetree@vger.kernel.org Changes v2..v4: - Documented autorepeat and poll-interval .../devicetree/bindings/input/adc-keys.txt | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/adc-keys.txt diff --git a/Documentation/devicetree/bindings/input/adc-keys.txt b/Documentation/devicetree/bindings/input/adc-keys.txt new file mode 100644 index 000000000000..6f26ad75ed2b --- /dev/null +++ b/Documentation/devicetree/bindings/input/adc-keys.txt @@ -0,0 +1,50 @@ +ADC attached resistor ladder buttons +------------------------------------ + +Required properties: + - compatible: "adc-keys" + - io-channels: Phandle to an ADC channel + - io-channel-names = "buttons"; + - keyup-threshold-mvolt: Voltage at which all the keys are considered up. + +Optional properties: + - poll-interval: Poll interval time in milliseconds + - autorepeat: Boolean, Enable auto repeat feature of Linux input + subsystem. + +Each button (key) is represented as a sub-node of "adc-keys": + +Required subnode-properties: + - label: Descriptive name of the key. + - linux,code: Keycode to emit. + - press-threshold-mvolt: Voltage adc input when this key is pressed. + +Example: + +#include + + adc-keys { + compatible = "adc-keys"; + io-channels = <&lradc 0>; + io-channel-names = "buttons"; + keyup-threshold-mvolt = <2000>; + + button@1500 { + label = "Volume Up"; + linux,code = ; + press-threshold-mvolt = <1500>; + }; + + button@1000 { + label = "Volume Down"; + linux,code = ; + press-threshold-mvolt = <1000>; + }; + + button@500 { + label = "Enter"; + linux,code = ; + press-threshold-mvolt = <500>; + }; + }; +