[PATCH v2 01/10] arm64: dts: imx952: Add idle-states node
From: Peng Fan (OSS) <hidden>
Date: 2026-01-11 12:40:50
Also in:
imx, linux-devicetree, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Peng Fan <peng.fan@nxp.com> Add idle-states node and refer it in A55 nodes to enable cpuidle. Signed-off-by: Peng Fan <peng.fan@nxp.com> --- arch/arm64/boot/dts/freescale/imx952.dtsi | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/imx952.dtsi b/arch/arm64/boot/dts/freescale/imx952.dtsi
index 33bde271d394d19407562f2a427a8a84b85bd679..91fe4916ac04d1d6337c2670374865c6f73163ba 100644
--- a/arch/arm64/boot/dts/freescale/imx952.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx952.dtsi@@ -1,6 +1,6 @@ // SPDX-License-Identifier: (GPL-2.0-only OR MIT) /* - * Copyright 2025 NXP + * Copyright 2025-2026 NXP */ #include <dt-bindings/dma/fsl-edma.h>
@@ -50,12 +50,27 @@ cpus { #address-cells = <1>; #size-cells = <0>; + idle-states { + entry-method = "psci"; + + cpu_pd_wait: cpu-pd-wait { + compatible = "arm,idle-state"; + arm,psci-suspend-param = <0x0010033>; + local-timer-stop; + entry-latency-us = <1000>; + exit-latency-us = <700>; + min-residency-us = <2700>; + wakeup-latency-us = <1500>; + }; + }; + A55_0: cpu@0 { device_type = "cpu"; compatible = "arm,cortex-a55"; reg = <0x0>; enable-method = "psci"; #cooling-cells = <2>; + cpu-idle-states = <&cpu_pd_wait>; power-domains = <&scmi_perf IMX952_PERF_A55>; power-domain-names = "perf"; i-cache-size = <32768>;
@@ -73,6 +88,7 @@ A55_1: cpu@100 { reg = <0x100>; enable-method = "psci"; #cooling-cells = <2>; + cpu-idle-states = <&cpu_pd_wait>; power-domains = <&scmi_perf IMX952_PERF_A55>; power-domain-names = "perf"; i-cache-size = <32768>;
@@ -90,6 +106,7 @@ A55_2: cpu@200 { reg = <0x200>; enable-method = "psci"; #cooling-cells = <2>; + cpu-idle-states = <&cpu_pd_wait>; power-domains = <&scmi_perf IMX952_PERF_A55>; power-domain-names = "perf"; i-cache-size = <32768>;
@@ -107,6 +124,7 @@ A55_3: cpu@300 { reg = <0x300>; enable-method = "psci"; #cooling-cells = <2>; + cpu-idle-states = <&cpu_pd_wait>; power-domains = <&scmi_perf IMX952_PERF_A55>; power-domain-names = "perf"; i-cache-size = <32768>;
--
2.37.1