From: Johan Hovold <johan+linaro@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx # 6.0
Tested-by: Steev Klimaszewski <steev@xxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240507144821.12275-6-johan+linaro@xxxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
};
};
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-6.6/arm64-dts-qcom-sc8280xp-x13s-fix-touchscreen-power-on.patch
