tree 079233c77c2512ad4e0c7372fcd87965e0c632e0
parent 4c29d1b3ae83ba3e3ece16e5183047689fd6cbb8
author Jonas Larsson <ljonas@google.com> 1553894659 -0700
committer Jonas Larsson <ljonas@google.com> 1569972580 -0700

qoriq_thermal: drop temp_delta in favor of hysteresis

The same temp_delta was applied to all trip points mapped to the sensor,
hysteresis was ignored.

Usage of thermal_zone_device_ops->get_trend is still questionable, the
default thermal core behavior makes more sense. Upstream kernel doesn't
set .get_trend, just .get_temp.

With this change configured hysteresis is at least honored, and both
trip temps and hysteresis can be set via sysfs as expected.

Change-Id: I2c6127c385a508146363a1bf8a0d10beef8a5a26
(cherry picked from commit 35561e7c9c733b61edd304cf62f934de67e40eb0)