hwmon: (lm85) Select the closest PWM frequency
The LM85 and compatible chips only support 8 arbitrary PWM frequencies.
The algorithm to pick one of them based on the user input is not
optimum. Improve it to always pick the closest supported frequency.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Herbert Poetzl <herbert@13thfloor.at>
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
index 6b676df..c323c2b 100644
--- a/drivers/hwmon/lm85.c
+++ b/drivers/hwmon/lm85.c
@@ -199,10 +199,9 @@
{
int i;
- if (freq >= lm85_freq_map[7])
- return 7;
+ /* Find the closest match */
for (i = 0; i < 7; ++i)
- if (freq <= lm85_freq_map[i])
+ if (freq <= (lm85_freq_map[i] + lm85_freq_map[i + 1]) / 2)
break;
return i;
}