From: Sudeep Holla Date: Wed, 16 Nov 2016 17:31:31 +0000 (+0000) Subject: BACKPORT: arm64: dts: juno: fix cluster sleep state entry latency on all SoC versions X-Git-Tag: release-20171130_firefly~4^2~100^2~147 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=33a79a60f5a5d924e3b31f496ecda1c250a7f03b;p=firefly-linux-kernel-4.4.55.git BACKPORT: arm64: dts: juno: fix cluster sleep state entry latency on all SoC versions The core and the cluster sleep state entry latencies can't be same as cluster sleep involves more work compared to core level e.g. shared cache maintenance. Experiments have shown on an average about 100us more latency for the cluster sleep state compared to the core level sleep. This patch fixes the entry latency for the cluster sleep state. Fixes: 28e10a8f3a03 ("arm64: dts: juno: Add idle-states to device tree") Cc: Lorenzo Pieralisi Cc: "Jon Medhurst (Tixy)" Reviewed-by: Liviu Dudau Signed-off-by: Sudeep Holla Signed-off-by: Arnd Bergmann Fixes: Change-Id: I7b2d81fa66f8ce8b229457cfefff06e9edd545c7 (arm64: dts: juno: Add idle-states to device tree) (cherry picked from commit 909e481e2467f202b97d42beef246e8829416a85) Signed-off-by: Amit Pundir --- diff --git a/arch/arm64/boot/dts/arm/juno-r1.dts b/arch/arm64/boot/dts/arm/juno-r1.dts index 8826f834f54f..29315af22147 100644 --- a/arch/arm64/boot/dts/arm/juno-r1.dts +++ b/arch/arm64/boot/dts/arm/juno-r1.dts @@ -76,7 +76,7 @@ compatible = "arm,idle-state"; arm,psci-suspend-param = <0x1010000>; local-timer-stop; - entry-latency-us = <300>; + entry-latency-us = <400>; exit-latency-us = <1200>; min-residency-us = <2500>; }; diff --git a/arch/arm64/boot/dts/arm/juno.dts b/arch/arm64/boot/dts/arm/juno.dts index 8830f12a8289..68816f71fa51 100644 --- a/arch/arm64/boot/dts/arm/juno.dts +++ b/arch/arm64/boot/dts/arm/juno.dts @@ -76,7 +76,7 @@ compatible = "arm,idle-state"; arm,psci-suspend-param = <0x1010000>; local-timer-stop; - entry-latency-us = <300>; + entry-latency-us = <400>; exit-latency-us = <1200>; min-residency-us = <2500>; };