[v2,1/9] arm64: dts: hi3660: enable idle states

Message ID 20170810022615.19204-2-guodong.xu@linaro.org
State New
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  • [v2,1/9] arm64: dts: hi3660: enable idle states
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Commit Message

Guodong Xu Aug. 10, 2017, 2:26 a.m.
From: Leo Yan <leo.yan@linaro.org>


On Hi3660 there have two clusters, one is CA53 cluster and another is
CA73 cluster. This two clusters have different idle states separately.
With Daniel Lezcano's patch (ARM: cpuidle: Support asymmetric idle
definition), now ARM idle driver can support different clusters with
different idle states.

Base on this, this patch is to bind two clusters idle states on Hi3660.
Except the "WFI" states are enabled by default for all CPUs, this patch
also binds below extra idle states:

- CA53 CPUs have two more states:
  CPU_SLEEP:       CPU power off state
  CLUSTER_SLEEP_0: Cluster power off state

- CA73 CPUs have three more states:
  CPU_NAP:         CPU retention state
  CPU_SLEEP:       CPU power off state
  CLUSTER_SLEEP_1: Cluster power off state

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Kevin Wang <jean.wangtao@linaro.org>
Signed-off-by: Leo Yan <leo.yan@linaro.org>

---
 arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 63 +++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

-- 
2.10.2

Comments

Daniel Lezcano Aug. 10, 2017, 10:07 a.m. | #1
Hi Guodong, Leo,

there are several typos in the patch description. I *humbly* propose an
alternate description to make it a bit more English friendly.

"""

There are two clusters on the Hi3660, the first one is Cortex-A53 based
and the other one is Cortex-A73 based. These two clusters have different
idle states.

Thanks to Daniel Lezcano's recent changes, the generic ARM cpuidle
driver can now support several clusters with different idle states, thus
supporting the big.Little architecture.

In addition to the WFI idle state which is the default shallowest state
for all ARM cpus, the Hi3660 supports the following states:

 - CA53 CPUs:
	- CPU_SLEEP:       CPU power off state
	- CLUSTER_SLEEP_0: Cluster power off state

 - CA73 CPUs:
	- CPU_NAP:         CPU retention state
	- CPU_SLEEP:       CPU power off state
	- CLUSTER_SLEEP_1: Cluster power off state

This patch adds the idle states description for the Hi3660 to the device
tree.

"""


Other than that.

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>





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diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
index c6a1961..8921310 100644
--- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
@@ -58,6 +58,7 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x0>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_0>;
 		};
 
 		cpu1: cpu@1 {
@@ -65,6 +66,7 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x1>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_0>;
 		};
 
 		cpu2: cpu@2 {
@@ -72,6 +74,7 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_0>;
 		};
 
 		cpu3: cpu@3 {
@@ -79,6 +82,7 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x3>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP_0>;
 		};
 
 		cpu4: cpu@100 {
@@ -86,6 +90,11 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x100>;
 			enable-method = "psci";
+			cpu-idle-states = <
+					&CPU_NAP
+					&CPU_SLEEP
+					&CLUSTER_SLEEP_1
+			>;
 		};
 
 		cpu5: cpu@101 {
@@ -93,6 +102,11 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x101>;
 			enable-method = "psci";
+			cpu-idle-states = <
+					&CPU_NAP
+					&CPU_SLEEP
+					&CLUSTER_SLEEP_1
+			>;
 		};
 
 		cpu6: cpu@102 {
@@ -100,6 +114,11 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x102>;
 			enable-method = "psci";
+			cpu-idle-states = <
+					&CPU_NAP
+					&CPU_SLEEP
+					&CLUSTER_SLEEP_1
+			>;
 		};
 
 		cpu7: cpu@103 {
@@ -107,6 +126,50 @@ 
 			device_type = "cpu";
 			reg = <0x0 0x103>;
 			enable-method = "psci";
+			cpu-idle-states = <
+					&CPU_NAP
+					&CPU_SLEEP
+					&CLUSTER_SLEEP_1
+			>;
+		};
+
+		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;
+				arm,psci-suspend-param = <0x0010000>;
+				entry-latency-us = <40>;
+				exit-latency-us = <70>;
+				min-residency-us = <3000>;
+			};
+
+			CLUSTER_SLEEP_0: cluster-sleep-0 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x1010000>;
+				entry-latency-us = <500>;
+				exit-latency-us = <5000>;
+				min-residency-us = <20000>;
+			};
+
+			CLUSTER_SLEEP_1: cluster-sleep-1 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x1010000>;
+				entry-latency-us = <1000>;
+				exit-latency-us = <5000>;
+				min-residency-us = <20000>;
+			};
 		};
 	};