On Mon, 15 Dec 2008 14:31:08 +0100, Hans de Goede wrote: > Hi Jean, > > Add some documentation about the f71882fg driver, and update the Kconfig > documentation to report the new supported models. > > Signed-off-by: Hans de Goede <hdegoede at redhat.com> Review: > Add some documentation about the f71882fg driver, and update the Kconfig > documentation to report the new supported models. > > Signed-off-by: Hans de Goede <hdegoede at redhat.com> > diff -up vanilla-2.6.28-rc8/Documentation/hwmon/f71882fg.foo vanilla-2.6.28-rc8/Documentation/hwmon/f71882fg > --- vanilla-2.6.28-rc8/Documentation/hwmon/f71882fg.foo 2008-12-15 13:21:31.000000000 +0100 > +++ vanilla-2.6.28-rc8/Documentation/hwmon/f71882fg 2008-12-15 14:25:54.000000000 +0100 > @@ -0,0 +1,89 @@ > +Kernel driver f71882fg > +====================== > + > +Supported chips: > + * Fintek F71882FG or F71883FG I certainly hope this is "and", not "or" ;) > + Prefix: 'f71882fg' > + Addresses scanned: none, address read from Super I/O config space > + Datasheet: Available from the Fintek website > + * Fintek F71862FG or F71863FG Ditto. > + Prefix: 'f71862fg' > + Addresses scanned: none, address read from Super I/O config space > + Datasheet: Available from the Fintek website > + * Fintek F8000 > + Prefix: 'f8000' > + Addresses scanned: none, address read from Super I/O config space > + Datasheet: Not public > + > +Author: Hans de Goede <hdegoede at redhat.com> > + > + > +Description > +----------- > + > +The Fintek F718xxFG/F8000 Super I/O chip includes complete hardware monitoring > +capabilities. It can monitor up to 9 voltages (3 for the F8000), 4 fans and > +3 temperature sensors. The use of a singular to designate 3 different chips sounds strange IMHO. > + > +This chip also has fan controlling features, using either DC or PWM, in > +three different modes (one manual, two automatic). > + > +The driver assumes that no more than one chip is present, which seems > +reasonable. > + > + > +Monitoring > +---------- > + > +The Voltage, Fan and Temperature Monitoring uses the standard sysfs > +interface as documented in sysfs-interface, without any exceptions. > + > + > +Fan Control > +----------- > + > +Both PWM (pulse-width modulation) and DC fan speed control methods are > +supported. The right one to use depends on external circuitry on the > +motherboard, so the driver assumes that the BIOS set the method > +properly. > + > +There are 2 modes to specify the speed of the fan, PWM duty cycle (or DC > +voltage) mode, where 0-100% duty cycle (0-100% of 12V) is specified. And RPM > +mode where the actual RPM of the fan (as measured) is controled and the speed Spelling: controlled. > +gets specified as 0-100% of the fan#_full_speed file. > + > +Since both modes work in a 0-100% (mapped to 0-255) scale, there isn't a > +whole lot of a difference when modifying fan control settings. The only > +important difference is that in RPM mode the 0-100% controls the fan speed > +between 0-100% of fan#_full_speed. It is assumed that if the BIOS programs > +RPM mode, it will also set fan#_full_speed properly, if it does not then > +fan control will not work properly, unless you set a sane fan#_full_speed > +value yourself. > + > +Switching between these modes requires re-initializing a whole bunch of > +registers, so the mode which the BIOS has set is kept. The mode is > +printed when loading the driver. > + > +Three different fan control modes are supported; the mode number is written > +to the pwm<n>_enable file. Note that not all modes are supported on all This mix of # and <n> for channel number is a bit confusing. > +chips, and some modes may only be available in RPM / PWM mode on the F8000. > +Writing an unsupported mode will result in an invalid parameter error. > + > +* 1: Manual mode > + You ask for a specific PWM duty cycle / DC voltage or a specific % of > + fan#_full_speed by writing to the pwm<n> file. This mode is only > + available on the F8000 if the fan channel is in RPM mode. > + > +* 2: Normal auto mode > + You can define a number of temperature/fan speed trip points, which % the > + fan should run at at this temp and which temp a fan should follow using the > + standard sysfs interface. The number and type of trip points is chip > + depended, see which files are available in sysfs. > + Fan/PWM channel 3 of the F8000 is always in this mode! > + > +* 3: Thermostat mode (Only available on the F8000 when in duty cycle mode) > + The fan speed is regulated to keep the temp the fan is mapped to between > + temp#_auto_point2_temp and temp#_auto_point3_temp. > + > +Both of the automatic modes require that pwm1 corresponds to fan1, pwm2 to > +fan2 and pwm3 to fan3. > diff -up vanilla-2.6.28-rc8/drivers/hwmon/Kconfig.foo vanilla-2.6.28-rc8/drivers/hwmon/Kconfig > --- vanilla-2.6.28-rc8/drivers/hwmon/Kconfig.foo 2008-12-15 14:26:14.000000000 +0100 > +++ vanilla-2.6.28-rc8/drivers/hwmon/Kconfig 2008-12-15 14:27:32.000000000 +0100 > @@ -284,11 +284,12 @@ config SENSORS_F71805F > will be called f71805f. > > config SENSORS_F71882FG > - tristate "Fintek F71882FG and F71883FG" > + tristate "Fintek F71862FG, F71882FG and F8000" > depends on EXPERIMENTAL > help > If you say yes here you get support for hardware monitoring > - features of the Fintek F71882FG and F71883FG Super-I/O chips. > + features of the Fintek F71882FG/F71883FG, F71862FG/71863FG > + and F8000 Super-I/O chips. > > This driver can also be built as a module. If so, the module > will be called f71882fg. -- Jean Delvare
