Re: [PATCH] arm64: dts: qcom: mahua-lenovo-thinkpad-t14s-gen7: Add Elan touchpad at 0x15

[Christopher Obbard]

On Wed, 14 Oct 2026 17:49:49 -0600, Luke Macken <luke@xxxxxxxxxx> wrote:
> Like the T14s Gen 6, the Gen 7 ships with either a Synaptics touchpad at
> I2C address 0x2c or an Elan one at 0x15. The dts only describes the
> Synaptics part, so on Elan units (e.g. 22A7000VUS) the touchpad@2c probe
> fails silently (nothing answers at that address) and there is no
> touchpad, while an I2C scan finds the device at 0x15.
> 
> Describe both, as x1e78100-lenovo-thinkpad-t14s.dtsi does; the absent one
> fails probe harmlessly. Both share the interrupt GPIO, so move the
> tpad_default pinctrl state from the Synaptics node to the i2c0 bus node
> rather than have two nodes claim the same pin.
> 
> [...]

Tested-by: Christopher Obbard <chris.obbard@xxxxxxxxxxxxxxxx>

-- 
Christopher Obbard