From patchwork Thu Nov 17 19:05:22 2022
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: "Lin, Meng-Bo" <linmengbo0689@protonmail.com>
X-Patchwork-Id: 13047206
Return-Path: <linux-input-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 05901C4332F
	for <linux-input@archiver.kernel.org>; Thu, 17 Nov 2022 19:05:31 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S234962AbiKQTFb (ORCPT <rfc822;linux-input@archiver.kernel.org>);
        Thu, 17 Nov 2022 14:05:31 -0500
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53784 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S232532AbiKQTFa (ORCPT
        <rfc822;linux-input@vger.kernel.org>);
        Thu, 17 Nov 2022 14:05:30 -0500
X-Greylist: delayed 9011 seconds by postgrey-1.37 at
 lindbergh.monkeyblade.net; Thu, 17 Nov 2022 11:05:29 PST
Received: from mail-4027.protonmail.ch (mail-4027.protonmail.ch
 [185.70.40.27])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3AAB4C27C
        for <linux-input@vger.kernel.org>;
 Thu, 17 Nov 2022 11:05:29 -0800 (PST)
Date: Thu, 17 Nov 2022 19:05:22 +0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com;
        s=protonmail3; t=1668711926; x=1668971126;
        bh=yPJuCb1OqNQw6Eu8hBP1cJKuQdzd/t0ti673JW0Nunk=;
        h=Date:To:From:Cc:Subject:Message-ID:Feedback-ID:From:To:Cc:Date:
         Subject:Reply-To:Feedback-ID:Message-ID:BIMI-Selector;
        b=stmdFS/YayGbVNsPFy2y17n38oNaOmh02vIHxJaQRG9gMYfCbA8UJlpfCh0LpHe6I
         Awiy1kqL9L6ru+/bhKUVjwldodD1OJi3265FMrA50i22MuNB0nIV8yuhxslRiV1A37
         LYoCUF6SQiqtoEU5e2vLyxWypIZVhGbZJt61njoUmT8zbYkmzBKG1rTXG3EzhPW268
         nn9neFCGoHzGuHExTekP3tj604LnGrTPhK9R69HKq9gAepie4geS/kp5Nt72s79aO+
         mw1DC91CPXJ1xcPipGE4EiB15A5GkU7YRqIYEyQdlBjv4P9Tg6At3UM1TfgJWpT6e1
         YYzHsc6xY6iqA==
To: linux-input@vger.kernel.org
From: "Lin, Meng-Bo" <linmengbo0689@protonmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Alistair Francis <alistair@alistair23.me>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] Input: cyttsp5 - add vddio regulator
Message-ID: <20221117190507.87535-1-linmengbo0689@protonmail.com>
Feedback-ID: 40467236:user:proton
MIME-Version: 1.0
Precedence: bulk
List-ID: <linux-input.vger.kernel.org>
X-Mailing-List: linux-input@vger.kernel.org

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.

Implement support for a "vddio-supply" that is enabled by the cyttsp5
driver so that the regulator gets enabled when needed.