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| author | Jean Delvare <khali@linux-fr.org> | 2007-07-05 20:39:40 +0200 |
|---|---|---|
| committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2007-10-09 22:56:30 -0400 |
| commit | 63f281a6e32ebc93c62dac0d399d8e054eb7b2ec (patch) | |
| tree | d60cf42951a3d274f263788f6f54c06695b2e41f /drivers/hwmon/lm85.c | |
| parent | 5a4d3ef317c845893fe3f9d3517cb0a99375da53 (diff) | |
| download | lwn-63f281a6e32ebc93c62dac0d399d8e054eb7b2ec.tar.gz lwn-63f281a6e32ebc93c62dac0d399d8e054eb7b2ec.zip | |
hwmon: (lm85) Let the user set the fan min limit to 0
Trying to set the fan min limit to 0 currently writes 0 to the
register, which is an invalid value. It's read back as -1 and the
alarm flag is raised. Instead we should write 0xffff (maximum
value), which reads back as 0 and no alarm flag is raised.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Juerg Haefliger <juergh at gmail.com>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers/hwmon/lm85.c')
| -rw-r--r-- | drivers/hwmon/lm85.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c index 0c61fa36c83c..2ca616d7c1c0 100644 --- a/drivers/hwmon/lm85.c +++ b/drivers/hwmon/lm85.c @@ -145,7 +145,12 @@ static int lm85_scaling[] = { /* .001 Volts */ #define INS_FROM_REG(n,val) SCALE((val), 192, lm85_scaling[n]) /* FAN speed is measured using 90kHz clock */ -#define FAN_TO_REG(val) (SENSORS_LIMIT( (val)<=0?0: 5400000/(val),0,65534)) +static inline u16 FAN_TO_REG(unsigned long val) +{ + if (!val) + return 0xffff; + return SENSORS_LIMIT(5400000 / val, 1, 0xfffe); +} #define FAN_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:5400000/(val)) /* Temperature is reported in .001 degC increments */ @@ -391,7 +396,7 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + unsigned long val = simple_strtoul(buf, NULL, 10); mutex_lock(&data->update_lock); data->fan_min[nr] = FAN_TO_REG(val); |