From patchwork Thu Nov 17 19:05:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lin, Meng-Bo" X-Patchwork-Id: 21877 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp576032wrr; Thu, 17 Nov 2022 11:11:32 -0800 (PST) X-Google-Smtp-Source: AA0mqf67f5sEkisEy3eCOcIJ186CHSPsSOZh44f+0KcyQhvoW2gW/kUo/dh5PRgj5zSh2vG7vvX2 X-Received: by 2002:a17:906:28cd:b0:7a5:a671:8236 with SMTP id p13-20020a17090628cd00b007a5a6718236mr3378803ejd.187.1668712291926; Thu, 17 Nov 2022 11:11:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668712291; cv=none; d=google.com; s=arc-20160816; b=ZOy295Nf3EHax9HhxkCJXQyW1ngOsWEoI4DwYQiEa6JXDF2uelh4f2QjluUxAvAjwh iPPV8FSUrnG2mx/ZKnJZn/yk0GvuFdI4qrLGSPVDX+UcL/M0eqtRMyXyq+QthYihGvVV DN1+yH4CGfg4hKLEOfOuGCBnKNxcPlBwTHT40E+OSjj0nakFy+D82p/ppLwr+OV8BtGE /JwJSDM2xLRwF0d5iDw7PhclWyGm6jzu77+wWytjoCnyDVqWKqkpJtAmrdg/CD8RkOOt 0eXL+nNp289qrIGXHEzQVOJqGkBXxNnlLvZ566em0YuIu4TOpa4GaNSknDBeA9Pe89rr IEcw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :feedback-id:references:in-reply-to:message-id:subject:cc:from:to :dkim-signature:date; bh=U5nqDWG9FhX2ieLESGVMcwyTvDa3UugkxKXP+0flQCE=; b=JTB8IY8P8pLbl1iqBtLIlM+5gU05fP1/RGU5+DdfejeqYmyXpVcwzknLq19bEpno+P ubeF3VIrBnvrFJPpIRj7BONbx2D4lOdRs+1DVLtkrahug5y9ZLMAjgRNQkC0QY7ICM7O bq+iMK4nRr2DA0BYQwhi5W4Co8Nwk3sZo27ltqmJPGGcZVsdxRWIkID7uA5R1/88VMmj dHATZGnxApWge0PCm7C540xWI9/bMq6Xlb5wr6nSEgUDj0dQCrBFatrj7LEw483+LMYT ThYJRIrfojoTG/EgAIrXCWw5bru7WEuXUbTxapYnKjgli8jiG0nZmRaFn2ZPDAQjXJ9c LL1g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b=sNA43D1G; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id b11-20020a056402278b00b0045878eab247si1667872ede.193.2022.11.17.11.11.07; Thu, 17 Nov 2022 11:11:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b=sNA43D1G; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240217AbiKQTFl (ORCPT + 99 others); Thu, 17 Nov 2022 14:05:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240151AbiKQTFj (ORCPT ); Thu, 17 Nov 2022 14:05:39 -0500 Received: from mail-40140.protonmail.ch (mail-40140.protonmail.ch [185.70.40.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75D157EC8C for ; Thu, 17 Nov 2022 11:05:37 -0800 (PST) Date: Thu, 17 Nov 2022 19:05:32 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1668711935; x=1668971135; bh=U5nqDWG9FhX2ieLESGVMcwyTvDa3UugkxKXP+0flQCE=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=sNA43D1GTk1KrLPZq18i+96MvMtzKp2n5/VzATph8CM1jOuorPqhrkSzLY0n+YMQj JDaYjwz5/zQ55flZ/vH9O5TEANFt/iRrKdDvheILyjbwICn1D+vbiroKSl9MJR8amh 66wogiRu+Ae+vAEx3lnXVT2WOY3d/g5ZdFr5R7VjBzS8EnjkZbS2Sm9Yw5AyTTTp31 h3eyeel+odwm84hvWvhpmhk/6/Qi1Gu7vT6/Xk6478HhMvRo83uASi6pVZh9voWbwt cf1S5vrIZVsSXJPSNu75ojZAbsFZxU7clgfQviw81E1EMdIXwLkGG6rTKdOIOPagyj AqewgeY596Ywg== To: linux-input@vger.kernel.org From: "Lin, Meng-Bo" Cc: Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Linus Walleij , Alistair Francis , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: input: cyttsp5: document vddio-supply Message-ID: <20221117190507.87535-2-linmengbo0689@protonmail.com> In-Reply-To: <20221117190507.87535-1-linmengbo0689@protonmail.com> References: <20221117190507.87535-1-linmengbo0689@protonmail.com> Feedback-ID: 40467236:user:proton MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749771660646245717?= X-GMAIL-MSGID: =?utf-8?q?1749771660646245717?= The Samsung touchscreen controllers are often used with external pull-up for the interrupt line and the I2C lines, so we might need to enable a regulator to bring the lines into usable state. Otherwise, this might cause spurious interrupts and reading from I2C will fail. Document support for a "vddio-supply" that is enabled by the cyttsp5 driver so that the regulator gets enabled when needed. Signed-off-by: Lin, Meng-Bo Acked-by: Krzysztof Kozlowski Reviewed-by: Alistair Francis --- .../devicetree/bindings/input/touchscreen/cypress,tt21000.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml index 1959ec394768..869a9bdd962f 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml @@ -34,6 +34,9 @@ properties: vdd-supply: description: Regulator for voltage. + vddio-supply: + description: Optional Regulator for I/O voltage. + reset-gpios: maxItems: 1