/* * fair_share.c - A simple weight based Thermal governor * * Copyright (C) 2012 Intel Corp * Copyright (C) 2012 Durgadoss R * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include "thermal_core.h" /** * get_trip_level: - obtains the current trip level for a zone * @tz: thermal zone device */ static int get_trip_level(struct thermal_zone_device *tz) { int count = 0; int trip_temp; enum thermal_trip_type trip_type; if (tz->trips == 0 || !tz->ops->get_trip_temp) return 0; for (count = 0; count < tz->trips; count++) { tz->ops->get_trip_temp(tz, count, &trip_temp); if (tz->temperature < trip_temp) break; } /* * count > 0 only if temperature is greater than first trip * point, in which case, trip_point = count - 1 */ if (count > 0) { tz->ops->get_trip_type(tz, count - 1, &trip_type); trace_thermal_zone_trip(tz, count - 1, trip_type); } return count; } static long get_target_state(struct thermal_zone_device *tz, struct thermal_cooling_device *cdev, int percentage, int level) { unsigned long max_state; cdev->ops->get_max_state(cdev, &max_state); return (long)(percentage * level * max_state) / (100 * tz->trips); } /** * fair_share_throttle - throttles devices associated with the given zone * @tz - thermal_zone_device * * Throttling Logic: This uses three parameters to calculate the new * throttle state of the cooling devices associated with the given zone. * * Parameters used for Throttling: * P1. max_state: Maximum throttle state exposed by the cooling device. * P2. percentage[i]/100: * How 'effective' the 'i'th device is, in cooling the given zone. * P3. cur_trip_level/max_no_of_trips: * This describes the extent to which the devices should be throttled. * We do not want to throttle too much when we trip a lower temperature, * whereas the throttling is at full swing if we trip critical levels. * (Heavily assumes the trip points are in ascending order) * new_state of cooling device = P3 * P2 * P1 */ static int fair_share_throttle(struct thermal_zone_device *tz, int trip) { struct thermal_instance *instance; int total_weight = 0; int total_instance = 0; int cur_trip_level = get_trip_level(tz); list_for_each_entry(instance, &tz->thermal_instances, tz_node) { if (instance->trip != trip) continue; total_weight += instance->weight; total_instance++; } list_for_each_entry(instance, &tz->thermal_instances, tz_node) { int percentage; struct thermal_cooling_device *cdev = instance->cdev; if (instance->trip != trip) continue; if (!total_weight) percentage = 100 / total_instance; else percentage = (instance->weight * 100) / total_weight; instance->target = get_target_state(tz, cdev, percentage, cur_trip_level); mutex_lock(&instance->cdev->lock); instance->cdev->updated = false; mutex_unlock(&instance->cdev->lock); thermal_cdev_update(cdev); } return 0; } static struct thermal_governor thermal_gov_fair_share = { .name = "fair_share", .throttle = fair_share_throttle, }; int thermal_gov_fair_share_register(void) { return thermal_register_governor(&thermal_gov_fair_share); } void thermal_gov_fair_share_unregister(void) { thermal_unregister_governor(&thermal_gov_fair_share); } ='5'>5space:mode:
authorJerome Brunet <jbrunet@baylibre.com>2017-01-20 08:20:24 -0800
committerArnd Bergmann <arnd@arndb.de>2017-01-27 16:46:42 +0100
commitfeb3cbea0946c67060e2d5bcb7499b0a6f6700fe (patch)
tree4789978854a7fd97de08f4b77f220bcd9278417b /sound/soc/sh/sh7760-ac97.c
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
ARM64: dts: meson-gxbb-odroidc2: fix GbE tx link breakage
OdroidC2 GbE link breaks under heavy tx transfer. This happens even if the MAC does not enable Energy Efficient Ethernet (No Low Power state Idle on the Tx path). The problem seems to come from the phy Rx path, entering the LPI state. Disabling EEE advertisement on the phy prevent this feature to be negociated with the link partner and solve the issue. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'sound/soc/sh/sh7760-ac97.c')