linux-kernel - Re: [PATCH 2/2] Input: cyttsp5

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Message-ID: <Y3ay6zgq7JiWDR/Z@google.com>
Date:   Thu, 17 Nov 2022 14:17:15 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>
Cc:     linux-input@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alistair Francis <alistair@...stair23.me>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Input: cyttsp5 - add vddio regulator

On Thu, Nov 17, 2022 at 07:05:41PM +0000, Lin, Meng-Bo wrote:
> 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.

This needs binding update.

Thanks.

-- 
Dmitry