From 86010c982db2030aad2c31f178b208964f5f6806 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Fri, 17 Oct 2008 17:51:13 +0200 Subject: [PATCH] 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 Acked-by: Herbert Poetzl --- drivers/hwmon/lm85.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) 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 @@ 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; } -- 2.7.4