Re: [PATCH v3 1/6] dt-bindings: HID: i2c-hid: elan: Introduce Elan eKTH8D18
From: Dmitry Torokhov
Date: Tue Jun 17 2025 - 16:31:02 EST
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@xxxxxxxxxxxx>
> Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
> Signed-off-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Applied, thank you.
--
Dmitry