Re: [PATCH] arm64: dts: qcom: hamoa/x1: Fix TODO in system power domain node

["Maulik Shah (mkshah)" <maulik.shah@oss.qualcomm.com>]

On 2/21/2026 4:21 PM, Daniel J Blueman wrote:
> At present, designs based on the Qualcomm X1 Hamoa reference platform have an always-on system power domain since the OF node values aren't implement.

Implemented.

> 
> Fix this by using the CPU C4, cluster CL5 and system DRIPS parameters from the ACPI DSDT Windows uses, together with the Low Power Idle _LPI minimum residency of 9000us and wake latency of 5000us as exit latency. Finally, assume the entry latency is the difference of these two values.

ACPI used 5000usec as total exit latency, with this change total exit latency will be 9000usec (sum of entry + exit).

> 
> Tested on a Lenovo Yoga Slim 7x with Qualcomm X1E-80-100.
> 
> Fixes: f33767e3cfa5 ("arm64: dts: qcom: x1e80100: Add missing system-wide PSCI power domain")

Using this fixes tag, can make the change back ported to stable kernels without dependencies and may break the GPIO IRQs.

Background:

PDC monitors the wakeup capable IRQs during system wide low power state, hitting the system low power mode can break to wake via GPIO IRQs. 
The system-wide idle state was not added since the wakeup capable GPIO IRQs were not configured at PDC with 602cb14e310a
("pinctrl: qcom: x1e80100: Bypass PDC wakeup parent for now").

So IMO this fixes tag should be used instead of above with the changes to configure PDC to monitor GPIO wake ups.
I have these changes to configure GPIO IRQs at PDC and enable back domain_ss3 idle state in my local tree, which i plan to
post this week or next.

Thanks,
Maulik

> Signed-off-by: Daniel J Blueman <daniel@quora.org>
> ---
>  arch/arm64/boot/dts/qcom/hamoa.dtsi | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/hamoa.dtsi b/arch/arm64/boot/dts/qcom/hamoa.dtsi
> index a17900eacb20..64338769bc85 100644
> --- a/arch/arm64/boot/dts/qcom/hamoa.dtsi
> +++ b/arch/arm64/boot/dts/qcom/hamoa.dtsi
> @@ -290,6 +290,14 @@ cluster_cl5: cluster-sleep-1 {
>  				exit-latency-us = <4000>;
>  				min-residency-us = <7000>;
>  			};
> +
> +			domain_ss3: domain-sleep-0 {
> +				compatible = "domain-idle-state";
> +				arm,psci-suspend-param = <0x0200c354>;
> +				entry-latency-us = <4000>;
> +				exit-latency-us = <5000>;
> +				min-residency-us = <9000>;
> +			};
>  		};
>  	};
>  
> @@ -448,7 +456,7 @@ cluster_pd2: power-domain-cpu-cluster2 {
>  
>  		system_pd: power-domain-system {
>  			#power-domain-cells = <0>;
> -			/* TODO: system-wide idle states */
> +			domain-idle-states = <&domain_ss3>;
>  		};
>  	};
>