[0/2] Input: cyttsp5 - add vddio regulator

Message ID	20221117190507.87535-1-linmengbo0689@protonmail.com (mailing list archive)
Headers	show Return-Path: <linux-input-owner@kernel.org> Date: Thu, 17 Nov 2022 19:05:22 +0000 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 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk
Series	Input: cyttsp5 - add vddio regulator \| expand [0/2] Input: cyttsp5 - add vddio regulator [1/2] dt-bindings: input: cyttsp5: document vddio-supply [2/2] Input: cyttsp5 - add vddio regulator

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20221117190507.87535-1-linmengbo0689@protonmail.com (mailing list archive)

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Date: Thu, 17 Nov 2022 19:05:22 +0000
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
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Feedback-ID: 40467236:user:proton
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Input: cyttsp5 - add vddio regulator | expand

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Lin, Meng-Bo Nov. 17, 2022, 7:05 p.m. UTC

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.