This patch adds a policy sysfs attribute to a thermal zone.
This attribute will give us the throttling policy used
for the zone. This is a RO attribute.
Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx>
---
drivers/thermal/thermal_sys.c | 32 ++++++++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 6adda39..8aa4200a6 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -378,10 +378,32 @@ passive_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%d\n", tz->forced_passive);
}
+static ssize_t
+policy_show(struct device *dev, struct device_attribute *devattr, char *buf)
+{
+ struct thermal_zone_device *tz = to_thermal_zone(dev);
+ struct thermal_zone_params *tzp = tz->tzp;
+
+ if (!tzp)
+ return sprintf(buf, "step_wise(default)\n");
+
+ switch (tzp->throttle_policy) {
+ case THERMAL_FAIR_SHARE:
+ return sprintf(buf, "fair_share\n");
+ case THERMAL_STEP_WISE:
+ return sprintf(buf, "step_wise\n");
+ case THERMAL_USER_SPACE:
+ return sprintf(buf, "user_space\n");
+ default:
+ return sprintf(buf, "unknown\n");
+ }
+}
+
static DEVICE_ATTR(type, 0444, type_show, NULL);
static DEVICE_ATTR(temp, 0444, temp_show, NULL);
static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
+static DEVICE_ATTR(throttle_policy, S_IRUGO, policy_show, NULL);
/* sys I/F for cooling device */
#define to_cooling_device(_dev) \
@@ -1349,10 +1371,16 @@ static int retrieve_zone_params(struct thermal_zone_device *tz)
/* It is not an error to not have any platform data */
ret = get_platform_thermal_params(tz);
- if (ret)
+ if (ret) {
tz->tzp = NULL;
+ return 0;
+ }
- return 0;
+ ret = device_create_file(&tz->device, &dev_attr_throttle_policy);
+ if (ret)
+ dev_err(&tz->device, "creating policy attr failed:%d\n", ret);
+
+ return ret;
}
/**
--
1.7.9.5
--
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