The touchscreen module on Glymur/Mahua CRDs is different from the one
used on Hamoa CRDs and requires the reset-gpios to be wired to the device.
Without this in place the reset line will remain permanently asserted
during resume leaving the device offline and causing all I2C transactions
to fail with -ENXIO.

Error Logs:
i2c_hid_of 3-0038: failed to change power setting.
i2c_hid_of 3-0038: PM: dpm_run_callback(): i2c_hid_core_pm_resume [i2c_hid] returns -6
i2c_hid_of 3-0038: PM: failed to resume async: error -6

Add the reset GPIO so the driver can deassert the line on resume,
restoring I2C communication with the device.

Fixes: e6bf559f7eb9 ("arm64: dts: qcom: glymur-crd: Enable keyboard, trackpad and touchscreen")
Signed-off-by: Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>
---
arm64: dts: glymur-crd: Add reset GPIO to touchscreen
prerequisite-message-id: 20260519-glymur-mahua-common-nodes-v2-1-9f1b89a3f398@oss.qualcomm.com
---
 arch/arm64/boot/dts/qcom/glymur-crd.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/glymur-crd.dtsi b/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
index 1de3a49f49e4..2259577b9ae1 100644
--- a/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
+++ b/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
@@ -623,6 +623,8 @@ touchscreen@38 {
 		vdd-supply = <&vreg_misc_3p3>;
 		vddl-supply = <&vreg_l15b_e0_1p8>;
 
+		reset-gpios = <&tlmm 48 GPIO_ACTIVE_LOW>;
+
 		pinctrl-0 = <&ts0_default>;
 		pinctrl-names = "default";
 	};

---
base-commit: 1d376e58cb4a94f89de0fa9195d583ad6b86eb89
change-id: 20260522-arm64-dts-glymur-crd-add-reset-gpio-to-touchscreen-5892beded29b

Best regards,
-- 
Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>

On 5/22/26 11:56 AM, Pradyot Kumar Nayak wrote:
> The touchscreen module on Glymur/Mahua CRDs is different from the one
> used on Hamoa CRDs and requires the reset-gpios to be wired to the device.
> Without this in place the reset line will remain permanently asserted
> during resume leaving the device offline and causing all I2C transactions
> to fail with -ENXIO.
> 
> Error Logs:
> i2c_hid_of 3-0038: failed to change power setting.
> i2c_hid_of 3-0038: PM: dpm_run_callback(): i2c_hid_core_pm_resume [i2c_hid] returns -6
> i2c_hid_of 3-0038: PM: failed to resume async: error -6
> 
> Add the reset GPIO so the driver can deassert the line on resume,
> restoring I2C communication with the device.
> 
> Fixes: e6bf559f7eb9 ("arm64: dts: qcom: glymur-crd: Enable keyboard, trackpad and touchscreen")
> Signed-off-by: Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad