From 928c4a5ce8684d2c8a37543b3361cfc12d83b167 Mon Sep 17 00:00:00 2001 From: Leo Yan Date: Tue, 9 Jan 2018 12:32:42 +0800 Subject: arm64: dts: Hi3660: Remove 'CPU_NAP' idle state Thanks a lot for Vincent Guittot careful work to find bug for 'CPU_NAP' idle state. At early time, the CPU CA73 CPU_NAP idle state has been supported on Hikey960. Later we found the system has the hang issue and for resolving this issue Hisilicon released new MCU firmware, but unfortunately the new MCU firmware has side effect and results in the CA73 CPU cannot really enter CPU_NAP state and roll back to WFI state. After discussion we cannot see the possibility to enable CA73 CPU_NAP state anymore on Hikey960, based on this conclusion we should remove this state from DT binding. Cc: Daniel Lezcano Cc: Kevin Wang Cc: Vincent Guittot Signed-off-by: Leo Yan Tested-by: Vincent Guittot Signed-off-by: Wei Xu --- arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 32 ++++--------------------------- 1 file changed, 4 insertions(+), 28 deletions(-) (limited to 'arch/arm64/boot/dts/hisilicon/hi3660.dtsi') diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi index 63d4f9dca77f..4ce4c282e19e 100644 --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi @@ -100,11 +100,7 @@ reg = <0x0 0x100>; enable-method = "psci"; next-level-cache = <&A73_L2>; - cpu-idle-states = < - &CPU_NAP - &CPU_SLEEP - &CLUSTER_SLEEP_1 - >; + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; capacity-dmips-mhz = <1024>; }; @@ -114,11 +110,7 @@ reg = <0x0 0x101>; enable-method = "psci"; next-level-cache = <&A73_L2>; - cpu-idle-states = < - &CPU_NAP - &CPU_SLEEP - &CLUSTER_SLEEP_1 - >; + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; capacity-dmips-mhz = <1024>; }; @@ -128,11 +120,7 @@ reg = <0x0 0x102>; enable-method = "psci"; next-level-cache = <&A73_L2>; - cpu-idle-states = < - &CPU_NAP - &CPU_SLEEP - &CLUSTER_SLEEP_1 - >; + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; capacity-dmips-mhz = <1024>; }; @@ -142,25 +130,13 @@ reg = <0x0 0x103>; enable-method = "psci"; next-level-cache = <&A73_L2>; - cpu-idle-states = < - &CPU_NAP - &CPU_SLEEP - &CLUSTER_SLEEP_1 - >; + cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_1>; capacity-dmips-mhz = <1024>; }; idle-states { entry-method = "psci"; - CPU_NAP: cpu-nap { - compatible = "arm,idle-state"; - arm,psci-suspend-param = <0x0000001>; - entry-latency-us = <7>; - exit-latency-us = <2>; - min-residency-us = <15>; - }; - CPU_SLEEP: cpu-sleep { compatible = "arm,idle-state"; local-timer-stop; -- cgit v1.2.3