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| author | Jean Delvare <khali@linux-fr.org> | 2007-06-17 16:09:12 +0200 |
|---|---|---|
| committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2007-07-19 14:22:15 -0400 |
| commit | 158ce07564b68d4215b9560213a089d6f7c5a4ea (patch) | |
| tree | 97483b4ab6d8d051164def0429082a8efdb503e2 /drivers/hwmon/w83627ehf.c | |
| parent | e432dc811bfb6b3d3ad618d99bd8d58132fec316 (diff) | |
| download | linux-158ce07564b68d4215b9560213a089d6f7c5a4ea.tar.gz linux-158ce07564b68d4215b9560213a089d6f7c5a4ea.tar.bz2 linux-158ce07564b68d4215b9560213a089d6f7c5a4ea.zip | |
hwmon/w83627ehf: Preserve speed reading when changing fan min
The w83627ehf driver changes the fan clock divider automatically when
a new min fan speed is set. It is supposed to preserve the fan speed
reading while doing so, bug doesn't really. Fix it.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers/hwmon/w83627ehf.c')
| -rw-r--r-- | drivers/hwmon/w83627ehf.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index 30a76404f0af..f4d850c71585 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -716,10 +716,15 @@ store_fan_min(struct device *dev, struct device_attribute *attr, /* Write both the fan clock divider (if it changed) and the new fan min (unconditionally) */ if (new_div != data->fan_div[nr]) { - if (new_div > data->fan_div[nr]) - data->fan[nr] >>= (data->fan_div[nr] - new_div); - else - data->fan[nr] <<= (new_div - data->fan_div[nr]); + /* Preserve the fan speed reading */ + if (data->fan[nr] != 0xff) { + if (new_div > data->fan_div[nr]) + data->fan[nr] >>= new_div - data->fan_div[nr]; + else if (data->fan[nr] & 0x80) + data->fan[nr] = 0xff; + else + data->fan[nr] <<= data->fan_div[nr] - new_div; + } dev_dbg(dev, "fan%u clock divider changed from %u to %u\n", nr + 1, div_from_reg(data->fan_div[nr]), |