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 <lorenzo.pieralisi@arm.com>
Cc: "Jon Medhurst (Tixy)" <tixy@linaro.org>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: Change-Id: I7b2d81fa66f8ce8b229457cfefff06e9edd545c7
       (arm64: dts: juno: Add idle-states to device tree)
(cherry picked from commit 909e481e2467f202b97d42beef246e8829416a85)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

diff --git a/arch/arm64/boot/dts/arm/juno-r1.dts b/arch/arm64/boot/dts/arm/juno-r1.dts
index 8826f834f54f25ca1b1912e9903af68d8c37453b..29315af22147b3300be711e35f39961fe5b7bb77 100644 (file)
--- 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 8830f12a8289c6841f6eb2792bd469523bc47343..68816f71fa5124755c656b68e17b7f304a34d2c2 100644 (file)
--- 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>;
                        };