[PATCH v3 03/13] arm64: dts: qcom: x1e78100-t14s: Mark the EC reset gpio as reserved
From: Abel Vesa
Date: Tue Sep 22 2026 - 03:52:03 EST
GPIO 65 from TLMM is used by the embedded controller as its reset line.
On some devices, toggling the embedded controller reset line makes the
device not power up at all, unless the battery is unplugged.
So reserve it in order to prevent Linux from requesting or
reconfiguring it.
Fixes: 7d1cbe2f4985 ("arm64: dts: qcom: Add X1E78100 ThinkPad T14s Gen 6")
Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index 75ad74bcb042..93c7e3a02041 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -1406,6 +1406,7 @@ &tcsr {
&tlmm {
gpio-reserved-ranges = <34 2>, /* Unused */
<44 4>, /* SPI (TPM) */
+ <65 1>, /* EC reset */
<72 2>, /* Secure EC I2C connection (?) */
<238 1>; /* UFS Reset */
--
2.54.0