hwmon: add support for Fintek F71882FG and F71883FG

This is the second version of a new driver for the hardware monitoring features
of the Fintek F71882FG and F71883FG Super-I/O chips. This version has several
small fixes for flaws discovered during the review of the first version.

This version of the driver does not support the pwm part of these chips (yet).
I'll first design a sysfs api for this and post that for discussion, and then
implement pwm support as an incremental patch over this one.

This driver supports all sensors of this chip, except for the vid inputs. The
vid inputs are somewhat documented in the datasheet, but I know nothing about
vid/vrm stuff. Help with this would be much appreciated.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Acked-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

drivers/hwmon/Kconfig

@@ -216,6 +216,16 @@ config SENSORS_F71805F
 	  This driver can also be built as a module.  If so, the module
 	  will be called f71805f.
 
+config SENSORS_F71882FG
+	tristate "Fintek F71882FG and F71883FG"
+	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.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called f71882fg.
+
 config SENSORS_FSCHER
 	tristate "FSC Hermes"
 	depends on I2C

drivers/hwmon/Makefile

@@ -29,6 +29,7 @@ obj-$(CONFIG_SENSORS_CORETEMP)	+= coretemp.o
 obj-$(CONFIG_SENSORS_DME1737)	+= dme1737.o
 obj-$(CONFIG_SENSORS_DS1621)	+= ds1621.o
 obj-$(CONFIG_SENSORS_F71805F)	+= f71805f.o
+obj-$(CONFIG_SENSORS_F71882FG)	+= f71882fg.o
 obj-$(CONFIG_SENSORS_FSCHER)	+= fscher.o
 obj-$(CONFIG_SENSORS_FSCPOS)	+= fscpos.o
 obj-$(CONFIG_SENSORS_GL518SM)	+= gl518sm.o