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....@linaro.org>
---
drivers/thermal/thermal_core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d9e525c..212688a 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -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,
--
1.9.1
--
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