@@ -908,7 +908,7 @@ sustainable_power_store(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct thermal_zone_device *tz = to_thermal_zone(dev);
- u32 sustainable_power;
+ u32 sustainable_power, old_val;
if (!tz->tzp)
return -EIO;
@@ -916,8 +916,12 @@ sustainable_power_store(struct device *dev, struct device_attribute *devattr,
if (kstrtou32(buf, 10, &sustainable_power))
return -EINVAL;
+ old_val = tz->tzp->sustainable_power;
+
tz->tzp->sustainable_power = sustainable_power;
+ tz->tzp->k_po = (tz->tzp->kpo * sustainable_power) / old_val;
+ tz->tzp->k_pu = (tz->tzp->kpu * sustainable_power) / old_val;
return count;
}
static DEVICE_ATTR(sustainable_power, S_IWUSR | S_IRUGO, sustainable_power_show,
k_po/k_pu are in essence ratio values compared with sustainable power. So when update sustainable power, we can recalculate k_po/k_pu simply with below formula: sustainable_power(new) k_p(new) = ---------------------- * k_p(old) sustainable_power(old) Signed-off-by: Leo Yan <leo.yan@linaro.org> --- drivers/thermal/thermal_core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/