thermal: get pid-governor params from of_thermal zone params

Added pid-governor specific parser for thermal-zone-params get its
tuning parameters from DT. We use the default values for parameters
not specified in DT. This allows zone specific tuning of pid-governor
parameters via of-thermal.

Bug 200004664

Change-Id: I316ead8babd1cfec11d82453ae7c79ed9642fe93
Signed-off-by: Diwakar Tundlam <dtundlam@nvidia.com>
Reviewed-on: http://git-master/r/452774
Reviewed-by: Jinyoung Park <jinyoungp@nvidia.com>
(cherry picked from commit 56ab8a75862fd2084d52f11ee0ecd506d142cbb1)
Signed-off-by: Srikar Srimath Tirumala <srikars@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/pid_thermal_gov.h b/include/linux/pid_thermal_gov.h
index 6cd17af54..c64ec3fe3 100644
--- a/include/linux/pid_thermal_gov.h
+++ b/include/linux/pid_thermal_gov.h
@@ -27,6 +27,9 @@ struct pid_thermal_gov_params {
         int gain_p; /* proportional gain */
         int gain_d; /* derivative gain */
 
+        /* max derivative output, percentage of max error */
+        unsigned long max_dout;
+
         unsigned long up_compensation;
         unsigned long down_compensation;
 };