Monaco has no PMIC PON node, so the power key is not described at all
and there is no pwrkey input device.  More importantly the board then
has no power-key wakeup source: the only way out of s2idle is the RTC
alarm or one of the PCIe/USB/remoteproc sources, and pressing the power
button does nothing.

Add the PON node with the power key, modelled on the pmm8654au PON on
lemans, which carries the same PMIC: the block lives at 0x1200 and its
interrupts are on block 0x12.

qcom,pmk8350-pwrkey has wakeup_source_default set, so the driver arms
the IRQ as a wakeup source without any additional DT property.

On an IQ-8275-EVK this gives a pmic_pwrkey input device under
c440000.spmi:pmic@0:pon@1200, and:

  # grep pwrkey /sys/kernel/debug/wakeup_sources
  c440000.spmi:pmic@0:pon@1200:pwrkey

"systemctl suspend" followed by a power-key press now resumes the board,
where before it stayed in s2idle until an RTC alarm fired.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Milosz Wasilewski <milosz.wasilewski@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/monaco-pmics.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/monaco-pmics.dtsi b/arch/arm64/boot/dts/qcom/monaco-pmics.dtsi
index 6e096b9b7546..aeaef002f791 100644
--- a/arch/arm64/boot/dts/qcom/monaco-pmics.dtsi
+++ b/arch/arm64/boot/dts/qcom/monaco-pmics.dtsi
@@ -14,6 +14,19 @@ pmm8620au_0: pmic@0 {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
+		pmm8620au_0_pon: pon@1200 {
+			compatible = "qcom,pmk8350-pon";
+			reg = <0x1200>, <0x800>;
+			reg-names = "hlos", "pbs";
+
+			pmm8620au_0_pon_pwrkey: pwrkey {
+				compatible = "qcom,pmk8350-pwrkey";
+				interrupts = <0x0 0x12 0x7 IRQ_TYPE_EDGE_BOTH>;
+				linux,code = <KEY_POWER>;
+				debounce = <15625>;
+			};
+		};
+
 		pmm8620au_0_rtc: rtc@6100 {
 			compatible = "qcom,pmk8350-rtc";
 			reg = <0x6100>, <0x6200>;

base-commit: ed2647532a225739e86c7f236a2ce82764ec2772
-- 
2.43.0

On 8/14/26 5:26 PM, Milosz Wasilewski wrote:
> Monaco has no PMIC PON node, so the power key is not described at all
> and there is no pwrkey input device.  More importantly the board then
> has no power-key wakeup source: the only way out of s2idle is the RTC
> alarm or one of the PCIe/USB/remoteproc sources, and pressing the power
> button does nothing.
> 
> Add the PON node with the power key, modelled on the pmm8654au PON on
> lemans, which carries the same PMIC: the block lives at 0x1200 and its
> interrupts are on block 0x12.
> 
> qcom,pmk8350-pwrkey has wakeup_source_default set, so the driver arms
> the IRQ as a wakeup source without any additional DT property.
> 
> On an IQ-8275-EVK this gives a pmic_pwrkey input device under
> c440000.spmi:pmic@0:pon@1200, and:
> 
>   # grep pwrkey /sys/kernel/debug/wakeup_sources
>   c440000.spmi:pmic@0:pon@1200:pwrkey
> 
> "systemctl suspend" followed by a power-key press now resumes the board,
> where before it stayed in s2idle until an RTC alarm fired.
> 
> Assisted-by: Claude:claude-opus-5
> Signed-off-by: Milosz Wasilewski <milosz.wasilewski@oss.qualcomm.com>
> ---

There's a parallel effort:

https://lore.kernel.org/linux-arm-msm/20260724-b4-add_pwrkey_and_resin-v6-0-41acc214d93a@oss.qualcomm.com/

Konrad

On Tue, Aug 18, 2026 at 9:02 AM Konrad Dybcio
<konrad.dybcio@oss.qualcomm.com> wrote:
>
>
> There's a parallel effort:
>
> https://lore.kernel.org/linux-arm-msm/20260724-b4-add_pwrkey_and_resin-v6-0-41acc214d93a@oss.qualcomm.com/
>

Thanks for pointing this out. I tested it and it works.

Best Regards,
Milosz