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

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commit 7bfb6a4289b0a63d67ec7d4ce3018cb4a7442f6a upstream.

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: 32c231385ed4 ("arm64: dts: qcom: sc8280xp: add Lenovo Thinkpad X13s devicetree")
Cc: stable@vger.kernel.org	# 6.0
Tested-by: Steev Klimaszewski <steev@kali.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20240507144821.12275-6-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2024-05-07 16:48:19 +02:00 committed by Greg Kroah-Hartman
parent 1e35301428
commit 25712a3791
1 changed files with 8 additions and 7 deletions
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15
arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
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@ -619,15 +619,16 @@
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>;
@ -1451,8 +1452,8 @@
reset-n-pins {
pins = "gpio99";
function = "gpio";
output-high;
drive-strength = <16>;
drive-strength = <2>;
bias-disable;
};
};