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[23.128.96.18]) by mx.google.com with ESMTP id p25si399396ejc.571.2021.05.19.12.25.58; Wed, 19 May 2021 12:26:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345660AbhESJn4 (ORCPT + 99 others); Wed, 19 May 2021 05:43:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344701AbhESJnu (ORCPT ); Wed, 19 May 2021 05:43:50 -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 E9635C061761 for ; Wed, 19 May 2021 02:42:30 -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 1ljIie-0002Bk-GX; Wed, 19 May 2021 11:42:24 +0200 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1ljIic-0007Ox-Qw; Wed, 19 May 2021 11:42:22 +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 v4 4/5] dt-bindings: touchscreen: resistive-adc-touch: add support for z1 and z2 channels Date: Wed, 19 May 2021 11:42:20 +0200 Message-Id: <20210519094221.27792-5-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210519094221.27792-1-o.rempel@pengutronix.de> References: <20210519094221.27792-1-o.rempel@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 --- .../input/touchscreen/resistive-adc-touch.yaml | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml index 38b4cbee9429..7fc22a403d48 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml @@ -27,6 +27,8 @@ properties: - description: x - description: y - description: pressure (optional) + - description: z1 (optional) + - description: z2 (optional) io-channel-names: oneOf: @@ -37,6 +39,11 @@ properties: - enum: [x, y, pressure] - enum: [x, y, pressure] - enum: [x, y, pressure] + - items: + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] + - enum: [x, y, z1, z2] touchscreen-size-x: true touchscreen-size-y: true @@ -46,6 +53,7 @@ properties: touchscreen-inverted-y: true touchscreen-swapped-x-y: true touchscreen-min-pressure: true + touchscreen-x-plate-ohms: true additionalProperties: false @@ -68,3 +76,11 @@ examples: io-channels = <&adc 24>, <&adc 25>, <&adc 26>; io-channel-names = "y", "pressure", "x"; }; + - | + touchscreen { + compatible = "resistive-adc-touch"; + touchscreen-min-pressure = <50000>; + io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>; + io-channel-names = "x", "z1", "z2", "y"; + touchscreen-x-plate-ohms = <800>; + }; -- 2.29.2