6.6-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
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 --- arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts | 15 ++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts +++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts @@ -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; }; };