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thermal: power_allocator: Add support to get PID constant from dt

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Change-Id: Ibabdad4ba2df6df26d75483dd35b6c51572befe8
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2018-12-04 16:06:23 +08:00
committed by Tao Huang
parent d2f238a541
commit f6ec026aa9
3 changed files with 21 additions and 3 deletions
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12
drivers/thermal/of-thermal.c
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@@ -1009,6 +1009,18 @@ int __init of_parse_thermal_zones(void)
if (!of_property_read_u32(child, "sustainable-power", &prop))
tzp->sustainable_power = prop;
if (!of_property_read_u32(child, "k_pu", &prop)) {
tzp->k_pu = prop;
tzp->is_k_pu_available = true;
}
if (!of_property_read_u32(child, "k_po", &prop)) {
tzp->k_po = prop;
tzp->is_k_po_available = true;
}
if (!of_property_read_u32(child, "k_i", &prop)) {
tzp->k_i = prop;
tzp->is_k_i_available = true;
}
for (i = 0; i < tz->ntrips; i++)
mask |= 1 << i;

6
drivers/thermal/power_allocator.c
View File

@@ -155,15 +155,15 @@ static void estimate_pid_constants(struct thermal_zone_device *tz,
if (!temperature_threshold)
return;
if (!tz->tzp->k_po || force)
if (!tz->tzp->is_k_po_available || force)
tz->tzp->k_po = int_to_frac(sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_pu || force)
if (!tz->tzp->is_k_pu_available || force)
tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_i || force)
if (!tz->tzp->is_k_i_available || force)
tz->tzp->k_i = int_to_frac(10) / 1000;
/*
* The default for k_d and integral_cutoff is 0, so we can

6
include/linux/thermal.h
View File

@@ -300,15 +300,21 @@ struct thermal_zone_params {
*/
s32 k_po;
bool is_k_po_available;
/*
* Proportional parameter of the PID controller when
* undershooting
*/
s32 k_pu;
bool is_k_pu_available;
/* Integral parameter of the PID controller */
s32 k_i;
bool is_k_i_available;
/* Derivative parameter of the PID controller */
s32 k_d;