bcm27xx: remove linux 4.19 support

[openwrt/staging/luka.git] / target / linux / bcm27xx / patches-4.19 / 950-0153-drivers-thermal-step_wise-add-support-for-hysteresis.patch

diff --git a/target/linux/bcm27xx/patches-4.19/950-0153-drivers-thermal-step_wise-add-support-for-hysteresis.patch b/target/linux/bcm27xx/patches-4.19/950-0153-drivers-thermal-step_wise-add-support-for-hysteresis.patch
deleted file mode 100644 (file)
index af447c1..0000000
--- a/target/linux/bcm27xx/patches-4.19/950-0153-drivers-thermal-step_wise-add-support-for-hysteresis.patch
+++ /dev/null
@@ -1,96 +0,0 @@
-From 05a13bbd7fbb76b4f690042173749a55d85de831 Mon Sep 17 00:00:00 2001
-From: Ram Chandrasekar <rkumbako@codeaurora.org>
-Date: Mon, 7 May 2018 11:54:08 -0600
-Subject: [PATCH] drivers: thermal: step_wise: add support for
- hysteresis
-
-From: Ram Chandrasekar <rkumbako@codeaurora.org>
-
-Step wise governor increases the mitigation level when the temperature
-goes above a threshold and will decrease the mitigation when the
-temperature falls below the threshold. If it were a case, where the
-temperature hovers around a threshold, the mitigation will be applied
-and removed at every iteration. This reaction to the temperature is
-inefficient for performance.
-
-The use of hysteresis temperature could avoid this ping-pong of
-mitigation by relaxing the mitigation to happen only when the
-temperature goes below this lower hysteresis value.
-
-Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
-Signed-off-by: Lina Iyer <ilina@codeaurora.org>
----
- drivers/thermal/step_wise.c | 33 +++++++++++++++++++++++----------
- 1 file changed, 23 insertions(+), 10 deletions(-)
-
---- a/drivers/thermal/step_wise.c
-+++ b/drivers/thermal/step_wise.c
-@@ -36,7 +36,7 @@
-  *       for this trip point
-  *    d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit
-  *       for this trip point
-- * If the temperature is lower than a trip point,
-+ * If the temperature is lower than a hysteresis temperature,
-  *    a. if the trend is THERMAL_TREND_RAISING, do nothing
-  *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
-  *       state for this trip point, if the cooling state already
-@@ -127,7 +127,7 @@ static void update_passive_instance(stru
- 
- static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
- {
--      int trip_temp;
-+      int trip_temp, hyst_temp;
-       enum thermal_trip_type trip_type;
-       enum thermal_trend trend;
-       struct thermal_instance *instance;
-@@ -135,22 +135,23 @@ static void thermal_zone_trip_update(str
-       int old_target;
- 
-       if (trip == THERMAL_TRIPS_NONE) {
--              trip_temp = tz->forced_passive;
-+              hyst_temp = trip_temp = tz->forced_passive;
-               trip_type = THERMAL_TRIPS_NONE;
-       } else {
-               tz->ops->get_trip_temp(tz, trip, &trip_temp);
-+              hyst_temp = trip_temp;
-+              if (tz->ops->get_trip_hyst) {
-+                      tz->ops->get_trip_hyst(tz, trip, &hyst_temp);
-+                      hyst_temp = trip_temp - hyst_temp;
-+              }
-               tz->ops->get_trip_type(tz, trip, &trip_type);
-       }
- 
-       trend = get_tz_trend(tz, trip);
- 
--      if (tz->temperature >= trip_temp) {
--              throttle = true;
--              trace_thermal_zone_trip(tz, trip, trip_type);
--      }
--
--      dev_dbg(&tz->device, "Trip%d[type=%d,temp=%d]:trend=%d,throttle=%d\n",
--                              trip, trip_type, trip_temp, trend, throttle);
-+      dev_dbg(&tz->device,
-+              "Trip%d[type=%d,temp=%d,hyst=%d]:trend=%d,throttle=%d\n",
-+              trip, trip_type, trip_temp, hyst_temp, trend, throttle);
- 
-       mutex_lock(&tz->lock);
- 
-@@ -159,6 +160,18 @@ static void thermal_zone_trip_update(str
-                       continue;
- 
-               old_target = instance->target;
-+              throttle = false;
-+              /*
-+               * Lower the mitigation only if the temperature
-+               * goes below the hysteresis temperature.
-+               */
-+              if (tz->temperature >= trip_temp ||
-+                 (tz->temperature >= hyst_temp &&
-+                 old_target != THERMAL_NO_TARGET)) {
-+                      throttle = true;
-+                      trace_thermal_zone_trip(tz, trip, trip_type);
-+              }
-+
-               instance->target = get_target_state(instance, trend, throttle);
-               dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n",
-                                       old_target, (int)instance->target);