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>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
index 6b676df3547b..c323c2b89808 100644
--- a/drivers/hwmon/lm85.c
+++ b/drivers/hwmon/lm85.c
@@ -199,10 +199,9 @@ static int FREQ_TO_REG(int freq)
 {
         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;
 }