Commit 7bfb6a42 authored by Johan Hovold's avatar Johan Hovold Committed by Bjorn Andersson
Browse files

arm64: dts: qcom: sc8280xp-x13s: fix touchscreen power on 



The Elan eKTH5015M touch controller on the X13s requires a 300 ms delay
before sending commands after having deasserted reset during power on.

Switch to the Elan specific binding so that the OS can determine the
required power-on sequence and make sure that the controller is always
detected during boot.

Note that the always-on 1.8 V supply (s10b) is not used by the
controller directly and should not be described.

Fixes: 32c23138 ("arm64: dts: qcom: sc8280xp: add Lenovo Thinkpad X13s devicetree")
Cc: stable@vger.kernel.org	# 6.0
Tested-by: default avatarSteev Klimaszewski <steev@kali.org>
Signed-off-by: default avatarJohan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20240507144821.12275-6-johan+linaro@kernel.org


Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
parent 8e99e770

arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts

+8 −7
Original line number Diff line number Diff line
@@ -655,15 +655,16 @@ &i2c4 { 


	status = "okay";



	/* FIXME: verify */

	touchscreen@10 {

		compatible = "hid-over-i2c";

		compatible = "elan,ekth5015m", "elan,ekth6915";

		reg = <0x10>;



		hid-descr-addr = <0x1>;

		interrupts-extended = <&tlmm 175 IRQ_TYPE_LEVEL_LOW>;

		vdd-supply = <&vreg_misc_3p3>;

		vddl-supply = <&vreg_s10b>;

		reset-gpios = <&tlmm 99 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;

		no-reset-on-power-off;



		vcc33-supply = <&vreg_misc_3p3>;

		vccio-supply = <&vreg_misc_3p3>;



		pinctrl-names = "default";

		pinctrl-0 = <&ts0_default>;
@@ -1496,8 +1497,8 @@ int-n-pins { 
		reset-n-pins {

			pins = "gpio99";

			function = "gpio";

			output-high;

			drive-strength = <16>;

			drive-strength = <2>;

			bias-disable;

		};

	};