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: 32c2313 ("arm64: dts: qcom: sc8280xp: add Lenovo Thinkpad X13s devicetree")
Cc: [email protected]	# 6.0
Tested-by: Steev Klimaszewski <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

Author: jhovold

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

@@ -655,15 +655,16 @@
 
 	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 @@
 		reset-n-pins {
 			pins = "gpio99";
 			function = "gpio";
-			output-high;
-			drive-strength = <16>;
+			drive-strength = <2>;
+			bias-disable;
 		};
 	};