-The ADT7470 DOES NOT sample all inputs continuously. A single pin on the
-ADT7470 is connected to a multitude of thermal diodes, but the chip must be
-instructed explicitly to read the multitude of diodes. If you want to use
-automatic fan control mode, you must manually read any of the temperature
-sensors or the fan control algorithm will not run. The chip WILL NOT DO THIS
-AUTOMATICALLY; this must be done from userspace. This may be a bug in the chip
-design, given that many other AD chips take care of this. The driver will not
-read the registers more often than once every 5 seconds. Further,
-configuration data is only read once per minute.
+The ADT7470 samples all inputs continuously. A kernel thread is started up for
+the purpose of periodically querying the temperature sensors, thus allowing the
+automatic fan pwm control to set the fan speed. The driver will not read the
+registers more often than once every 5 seconds. Further, configuration data is
+only read once per minute.