From patchwork Mon May 10 19:31:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 12249275 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 4A50AC433ED for ; Mon, 10 May 2021 19:53:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 120C061424 for ; Mon, 10 May 2021 19:53:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230342AbhEJTyn (ORCPT ); Mon, 10 May 2021 15:54:43 -0400 Received: from mo4-p01-ob.smtp.rzone.de ([81.169.146.165]:33021 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231651AbhEJTym (ORCPT ); Mon, 10 May 2021 15:54:42 -0400 X-Greylist: delayed 362 seconds by postgrey-1.27 at vger.kernel.org; Mon, 10 May 2021 15:54:42 EDT ARC-Seal: i=1; a=rsa-sha256; t=1620675691; cv=none; d=strato.com; s=strato-dkim-0002; b=E3s379Pcz6m5c2eiCFYn6tEydRwo1kChePN2SK7CLBYxpiqUQ+SPo/XubMdGIEEtG2 fKo0facaVgOIq6DasmBGubbdvoQh+npKb5VVBuirbrvo4PqK49LCWLx2hYzn9m+YNayQ lMNK2GNB9dD9LIfKBEjqPRO3gQpkfb1hteCFdcF2fAvAoGPkTtEacPEYuPckrNylZ6sD zCdbnPKTsdWJzJ8FjExYvOH3Nv4YGpnbZ7fLti9s/U7Ya6XfQuvq53v5C1dt6IDkyEq3 m0G29UJ2sRu7P4df0YYlIAtTAglU5AUAs6M1xVLX6iE5k1ylE820K04nxJ8GZU/4uis8 zZAw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1620675691; s=strato-dkim-0002; d=strato.com; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=TFB/5G3yt0EOH3u0v6krrpts7AKC5aDuRVy+pogaHus=; b=RdgNd6Jn3V2ZivOkVQudSfoH/IgtOAJ9uZZ4jvnE6r7GJAOglwV3OjgS8hY039cC61 rkCHeohztSzweqlLQ0C1r94ZjYcSTI4/SZNkB7DVgPnL1tjv1Z7IZeWZQ9dqb4GwPosl PHCuL+rvllVjZN3q3L2QdrKBat0sVN0+jDvtL2/4Mc+jwXE+7q1oE1SPKkiTJaxGjCSl bn/yhFzXWMf3zRtez6vpAqlFFy18oDnU3zPiXWdAo9+TMkML9h2otcvUlbxyNEaL7KGM IzTkm7a/7/gloM62cjZ3qZox4Ho2N3Q9GWtBfn0O+Y3yRjVLk5VVUs1T7InqZTPEM/oB 80uQ== ARC-Authentication-Results: i=1; strato.com; dkim=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1620675691; s=strato-dkim-0002; d=gerhold.net; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=TFB/5G3yt0EOH3u0v6krrpts7AKC5aDuRVy+pogaHus=; b=RFsAC6sTPN1zdGGwH3v5IWIgBcQ44/UPgqgq+PTPGclYDWGVO7+LKW2zurhHLsxcVW sJoWaiSdCRY5eQ3EFvTpubCP06UP7L9w5q6NLFuQb0Md/r3TNKLas4HwUOtU6o0jA/Th oz2DywczDAiWZyk15lEuoDYqTak8X6dWcdkhIudNHWIRGKB7ZuN3+sLntCJSTQ4gqIgD 4mZ6fBYv3qg0yRlX1CexxwNIm8U4nRnR/cgLoT3nO2r47ZsjC7NXSwnISGdErg5tacL1 wAA4P0/xL5tfKH1ReyJsd6ObuF3PEfxDUwUe5cb64cOwgpf91JdRo+q3suO77lQh30X5 Y0Ow== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB5m6NCQEo" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.25.6 DYNA|AUTH) with ESMTPSA id e01f26x4AJfTYUH (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Mon, 10 May 2021 21:41:29 +0200 (CEST) From: Stephan Gerhold To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Simon Budig , Andy Shevchenko , Stephan Gerhold , Ondrej Jirman , Marco Felsch , Rob Herring Subject: [PATCH v2 1/2] dt-bindings: input: touchscreen: edt-ft5x06: add iovcc-supply Date: Mon, 10 May 2021 21:31:07 +0200 Message-Id: <20210510193108.50178-1-stephan@gerhold.net> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org At the moment, the edt-ft5x06 driver can control a single regulator ("vcc"). However, some FocalTech touch controllers have an additional IOVCC pin that should be supplied with the digital I/O voltage. The I/O voltage might be provided by another regulator that should also be kept on. Otherwise, the touchscreen can randomly stop functioning if the regulator is turned off because no other components still require it. Document (optional) support for controlling the regulator for IOVCC using "iovcc-supply". Cc: Ondrej Jirman Cc: Marco Felsch Acked-by: Rob Herring Signed-off-by: Stephan Gerhold --- Changes in v2: None, added Rob's Acked-by v1: https://lore.kernel.org/linux-input/20210108192337.563679-1-stephan@gerhold.net/ --- .../devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml index bfc3a8b5e118..2e8da7470513 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml @@ -56,6 +56,7 @@ properties: wakeup-source: true vcc-supply: true + iovcc-supply: true gain: description: Allows setting the sensitivity in the range from 0 to 31.