Export sysfs attributes to monitor and control the internal thinkpad fan
(some thinkpads have more than one fan, but thinkpad-acpi doesn't support
the second fan yet). The sysfs interface follows the hwmon design guide
for fan devices.
Also, fix some stray "thermal" files in the fan procfs description that
have been there forever, and officially support "full-speed" as the name
for the PWM-disabled state of the fan controller to keep it in line with
the hwmon interface. It is much better a name for that mode than the
unobvious "disengaged" anyway. Change the procfs interface to also accept
full-speed as a fan level, but still report it as disengaged for backwards
compatibility.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Export thinkpad thermal sensors to sysfs, following the hwmon
specification for thermal monitoring sensors.
ThinkPad thermal monitoring is done by the EC. Sensors can show up or
disappear at runtime when they are inside hotswappable hardware, such as
batteries. Sensors that are not available return -ENXIO when accessed.
Up to 16 thermal sensors are supported on new firmware (but nobody has
reported a ThinkPad with more than 12 sensors so far), and 8 sensors are
supported on older firmware. Thermal sensor mapping is model-specific.
Precision varies, it is 1 degree Celcius on new ThinkPads, but higher on
some older models.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Add the sysfs attributes for the platform driver.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Register thinkpad-acpi platform driver and platform device for the device
model. Also register the platform device with the hwmon class.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Improve the detection of ThinkPads, so as to reduce the chances of false
positives.
Since this could potentially add false negatives on the very old models,
add a module parameter to force the detection of a thinkpad.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Add debug messages to the subdriver initialization and exit code.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Add a debug mode parameter and verbose debug mode Kconfig option.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Cleanup documentation, driver strings and other misc stuff, now that the
driver is named "thinkpad-acpi".
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Rename the ibm-acpi driver to thinkpad-acpi. ThinkPads are not even made
by IBM anymore, so it is high time to rename the driver...
The name thinkpad-acpi was used sometime ago by a thinkpad-specific hotkey
driver by Erik Rigtorp, around the 2.6.8-2.6.10 time frame. The driver
apparently never got merged into mainline (it did make some trips through
-mm). ibm-acpi was merged soon after, making its debut in 2.6.10.
The reuse of the thinkpad-acpi name shouldn't be a problem as far as user
confusion goes, as Erik's thinkpad-acpi apparently didn't get widespread
use in the Linux ThinkPad community and most hits for thinkpad-acpi in
google point to ibm-acpi anyway.
Erik, if you read this, please consider the reuse of the thinkpad-acpi name
as a compliment to your effort to make ThinkPads more useful to all of us.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
