[PATCH V2] thermal/of: Allow users to set governor for a thermal zone in DT

From: Di Shen
Date: Fri Dec 02 2022 - 04:12:42 EST


The governor of all thermal zones can be initialized in
thermal_zone_device_register_with_trips(), but it is always the
def_governor, this means the governor of all thermal zones are
the same.

Allow users to set governor for a specific thermal zone in DT, in
this way, users can use different policies for thermal management.

Signed-off-by: Di Shen <di.shen@xxxxxxxxxx>
---
drivers/thermal/thermal_of.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index d4b6335ace15..4a29ac3be2ac 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -355,6 +355,7 @@ static struct thermal_zone_params *thermal_of_parameters_init(struct device_node
int coef[2];
int ncoef = ARRAY_SIZE(coef);
int prop, ret;
+ const char *governor_name;

tzp = kzalloc(sizeof(*tzp), GFP_KERNEL);
if (!tzp)
@@ -365,6 +366,11 @@ static struct thermal_zone_params *thermal_of_parameters_init(struct device_node
if (!of_property_read_u32(np, "sustainable-power", &prop))
tzp->sustainable_power = prop;

+ if (!of_property_read_string(np, "policy", &governor_name)) {
+ strncpy(tzp->governor_name, governor_name, THERMAL_NAME_LENGTH - 1);
+ tzp->governor_name[THERMAL_NAME_LENGTH - 1] = '\0';
+ }
+
/*
* For now, the thermal framework supports only one sensor per
* thermal zone. Thus, we are considering only the first two
--
2.17.1