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| author | Jean Delvare <khali@linux-fr.org> | 2008-10-17 17:51:16 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-10-17 17:51:16 +0200 |
| commit | 4ed1077953f531b3fef4af4b4ade48a828c48869 (patch) | |
| tree | aa7e98269aba19ec851521ad2127e87c615fff36 | |
| parent | 0c6e97317102a8f480bdfb418f19fe989ad1c047 (diff) | |
| download | kernel_samsung_crespo-4ed1077953f531b3fef4af4b4ade48a828c48869.zip kernel_samsung_crespo-4ed1077953f531b3fef4af4b4ade48a828c48869.tar.gz kernel_samsung_crespo-4ed1077953f531b3fef4af4b4ade48a828c48869.tar.bz2 | |
hwmon: (it87) Fix thermal sensor type values
The it87 driver doesn't follow the standard sensor type values as
documented in Documentation/hwmon/sysfs-interface. It uses value 2 for
thermistors instead of value 4. This causes "sensors" to tell the user
that the chip is setup for a transistor while it is actually setup for
a thermistor.
Using value 4 for thermistors solves the problem. For compatibility
reasons, we still accept value 2 but emit a warning message so that
users update their configuration files.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
| -rw-r--r-- | Documentation/hwmon/it87 | 4 | ||||
| -rw-r--r-- | drivers/hwmon/it87.c | 11 |
2 files changed, 10 insertions, 5 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87 index 3496b70..042c041 100644 --- a/Documentation/hwmon/it87 +++ b/Documentation/hwmon/it87 @@ -136,10 +136,10 @@ once-only alarms. The IT87xx only updates its values each 1.5 seconds; reading it more often will do no harm, but will return 'old' values. -To change sensor N to a thermistor, 'echo 2 > tempN_type' where N is 1, 2, +To change sensor N to a thermistor, 'echo 4 > tempN_type' where N is 1, 2, or 3. To change sensor N to a thermal diode, 'echo 3 > tempN_type'. Give 0 for unused sensor. Any other value is invalid. To configure this at -startup, consult lm_sensors's /etc/sensors.conf. (2 = thermistor; +startup, consult lm_sensors's /etc/sensors.conf. (4 = thermistor; 3 = thermal diode) diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c index d793cc0..b74c957 100644 --- a/drivers/hwmon/it87.c +++ b/drivers/hwmon/it87.c @@ -477,7 +477,7 @@ static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, if (reg & (1 << nr)) return sprintf(buf, "3\n"); /* thermal diode */ if (reg & (8 << nr)) - return sprintf(buf, "2\n"); /* thermistor */ + return sprintf(buf, "4\n"); /* thermistor */ return sprintf(buf, "0\n"); /* disabled */ } static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, @@ -493,10 +493,15 @@ static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, data->sensor &= ~(1 << nr); data->sensor &= ~(8 << nr); - /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ + if (val == 2) { /* backwards compatibility */ + dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " + "instead\n"); + val = 4; + } + /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ if (val == 3) data->sensor |= 1 << nr; - else if (val == 2) + else if (val == 4) data->sensor |= 8 << nr; else if (val != 0) { mutex_unlock(&data->update_lock); |