From patchwork Tue May 18 12:57:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 442826 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 492D0C433ED for ; Tue, 18 May 2021 12:58:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B2D161209 for ; Tue, 18 May 2021 12:58:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232320AbhERM7U (ORCPT ); Tue, 18 May 2021 08:59:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233079AbhERM7S (ORCPT ); Tue, 18 May 2021 08:59:18 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30CC6C061756 for ; Tue, 18 May 2021 05:57:58 -0700 (PDT) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lizIE-0002tl-By; Tue, 18 May 2021 14:57:50 +0200 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lizID-00078e-Ro; Tue, 18 May 2021 14:57:49 +0200 From: Oleksij Rempel To: Dmitry Torokhov , Rob Herring , Jonathan Cameron Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, David Jander , devicetree@vger.kernel.org Subject: [PATCH v2 3/4] dt-bindings: touchscreen: resistive-adc-touch: add support for z1 and z2 channels Date: Tue, 18 May 2021 14:57:47 +0200 Message-Id: <20210518125748.26823-4-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210518125748.26823-1-o.rempel@pengutronix.de> References: <20210518125748.26823-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-input@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org For pressure calculation based on plates resistance we need some additional properties: - z1 and z2 channels with additional measurements between plates - actual resistance of the touchscreen. Currently we use only X-resistance. Signed-off-by: Oleksij Rempel --- .../bindings/input/touchscreen/resistive-adc-touch.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml index 53df21a6589e..538c3b1ef1e1 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml @@ -43,6 +43,7 @@ properties: touchscreen-inverted-y: true touchscreen-swapped-x-y: true touchscreen-min-pressure: true + touchscreen-x-plate-ohms: true additionalProperties: false @@ -59,3 +60,11 @@ examples: io-channels = <&adc 24>, <&adc 25>, <&adc 26>; io-channel-names = "x", "y", "pressure"; }; + - | + resistive_touch { + compatible = "resistive-adc-touch"; + touchscreen-min-pressure = <50000>; + io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>; + io-channel-names = "x", "y", "z1", "z2"; + touchscreen-x-plate-ohms = <800>; + };