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[U-Boot,04/40] arm64: zynqmp: Reduced min-residency time for idle state node

Message ID 18793de3e466a0cdd14c9e449c2f95481a275b69.1509970359.git.michal.simek@xilinx.com
State Accepted
Commit 6a097b0d054f1493ecf623dde83b26e6ec5a7c2d
Delegated to: Michal Simek
Headers show
Series zynqmp: arm64: DT changes | expand

Commit Message

Michal Simek Nov. 6, 2017, 12:12 p.m. UTC 
From: Jolly Shah <jolly.shah@xilinx.com>

Changed min-residence to 10ms(was 100 ms) for cpu-sleep-0.
Tried lower values 5ms and 8ms and it worked fine with Debug Off.
But to accommodate PM Debug On case, 10 ms is required. With this
change, low power idle state is into effect more frequently.
Measured boot time with PM debugs On and Off. No change observed
compared to 100ms value.

Signed-off-by: Jolly Shah <jollys@xilinx.com>
Acked-by: Will Wong <willw@xilinx.com>
Tested-by: Koteswararao Nayudu <kotin@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

 arch/arm/dts/zynqmp.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index 0759a2b7234a..fc34033f9415 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -62,7 +62,7 @@ 
 				local-timer-stop;
 				entry-latency-us = <300>;
 				exit-latency-us = <600>;
-				min-residency-us = <800000>;
+				min-residency-us = <10000>;
 			};
 		};
 	};