linux-kernel - Re: [PATCH v3 1/6] dt-bindings: HID: i2c-hid: elan: Introduce Elan eKTH8D18

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Message-ID: <zcdks6nwmnahlgp6vvbxmmlbfbafzluuxgb52byiisuoy7ewzu@kao7yhx2u3qt>
Date: Tue, 17 Jun 2025 13:30:45 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Chen-Yu Tsai <wenst@...omium.org>
Cc: Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, linux-input@...r.kernel.org, 
	Douglas Anderson <dianders@...omium.org>, "Rob Herring (Arm)" <robh@...nel.org>
Subject: Re: [PATCH v3 1/6] dt-bindings: HID: i2c-hid: elan: Introduce Elan
 eKTH8D18

On Tue, Jun 17, 2025 at 04:19:58PM +0800, Chen-Yu Tsai wrote:
> The Elan eKTH8D18 touchscreen controller is an I2C HID device with a
> longer boot-up time. Power sequence timing wise it is compatible with
> the eKTH6A12NAY, with a power-on delay of at least 5ms, 20ms
> out-of-reset for I2C ack response, and 150ms out-of-reset for I2C HID
> enumeration, both shorter than what the eKTH6A12NAY requires.
> Enumeration and subsequent operation follows the I2C HID standard.
> 
> Add a compatible string for it with the ekth6a12nay one as a fallback.
> No enum was used as it is rare to actually add new entries. These
> chips are commonly completely backward compatible, and unless the
> power sequencing delays change, there is no real effort being made to
> keep track of new parts, which come out constantly.
> 
> Also drop the constraints on the I2C address since it's not really
> part of the binding.
> 
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>

Applied, thank you.

-- 
Dmitry