[RFC,2/2] arm64: dts: imx8mq: Add idle states and gpcv2 wake_request broken property
diff mbox series

Message ID 20190610121346.15779-3-abel.vesa@nxp.com
State RFC
Headers show
Series
  • Add workaround for core wake-up on IPI for i.MX8MQ
Related show

Commit Message

Abel Vesa June 10, 2019, 12:13 p.m. UTC
Add the cpu-sleep idle state with all the necessary parameters and also add
the cpu-idle-states to the cpu nodes.

The 'broken-wake-request-signals' property is used to let the irq-imx-gpcv2
driver know that the wake request signals from GIC are not linked to the
GPC at all and, therefore, the driver should  make use of the dedicated
workaround to explicitly wake up the target core on every IPI.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Patch
diff mbox series

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index d09b808..7217138 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -103,6 +103,7 @@ 
 			#cooling-cells = <2>;
 			nvmem-cells = <&cpu_speed_grade>;
 			nvmem-cell-names = "speed_grade";
+			cpu-idle-states = <&CPU_SLEEP>;
 		};
 
 		A53_1: cpu@1 {
@@ -115,6 +116,7 @@ 
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_SLEEP>;
 		};
 
 		A53_2: cpu@2 {
@@ -127,6 +129,7 @@ 
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_SLEEP>;
 		};
 
 		A53_3: cpu@3 {
@@ -139,11 +142,27 @@ 
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_SLEEP>;
 		};
 
 		A53_L2: l2-cache0 {
 			compatible = "cache";
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			CPU_SLEEP: cpu-sleep {
+				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>;
+			};
+		};
+
 	};
 
 	a53_opp_table: opp-table {
@@ -502,6 +521,7 @@ 
 				reg = <0x303a0000 0x10000>;
 				interrupt-parent = <&gic>;
 				interrupt-controller;
+				broken-wake-request-signals;
 				#interrupt-cells = <3>;
 
 				pgc {