hwmon: Add support for Winbond W83L786NG/NR

Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

Documentation/hwmon/w83l786ng

+Kernel driver w83l786ng
+=====================
+
+Supported chips:
+  * Winbond W83L786NG/W83L786NR
+    Prefix: 'w83l786ng'
+    Addresses scanned: I2C 0x2e - 0x2f
+    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L786NRNG09.pdf
+
+Author: Kevin Lo <kevlo@kevlo.org>
+
+
+Module Parameters
+-----------------
+
+* reset boolean
+  (default 0)
+  Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default
+  behavior is no chip reset to preserve BIOS settings
+
+
+Description
+-----------
+
+This driver implements support for Winbond W83L786NG/W83L786NR chips.
+
+The driver implements two temperature sensors, two fan rotation speed
+sensors, and three voltage sensors.
+
+Temperatures are measured in degrees Celsius and measurement resolution is 1
+degC for temp1 and temp2.
+
+Fan rotation speeds are reported in RPM (rotations per minute). Fan readings
+readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64
+or 128 for fan 1/2) to give the readings more range or accuracy.
+
+Voltage sensors (also known as IN sensors) report their values in millivolts.
+An alarm is triggered if the voltage has crossed a programmable minimum
+or maximum limit.
+
+/sys files
+----------
+
+pwm[1-2] - this file stores PWM duty cycle or DC value (fan speed) in range:
+	    0 (stop) to 255 (full)
+pwm[1-2]_enable - this file controls mode of fan/temperature control:
+            * 0 Manual Mode
+            * 1 Thermal Cruise
+            * 2 Smart Fan II
+            * 4 FAN_SET
+pwm[1-2]_mode - Select PWM of DC mode
+            * 0 DC
+            * 1 PWM
+tolerance[1-2] - Value in degrees of Celsius (degC) for +- T

drivers/hwmon/Kconfig

@@ -683,6 +683,16 @@ config SENSORS_W83L785TS
 	  This driver can also be built as a module.  If so, the module
 	  will be called w83l785ts.
 
+config SENSORS_W83L786NG
+	tristate "Winbond W83L786NG, W83L786NR"
+	depends on I2C && EXPERIMENTAL
+	help
+	  If you say yes here you get support for the Winbond W83L786NG
+	  and W83L786NR sensor chips.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called w83l786ng.
+
 config SENSORS_W83627HF
 	tristate "Winbond W83627HF, W83627THF, W83637HF, W83687THF, W83697HF"
 	select HWMON_VID

drivers/hwmon/Makefile

@@ -68,6 +68,7 @@ obj-$(CONFIG_SENSORS_VT1211)	+= vt1211.o
 obj-$(CONFIG_SENSORS_VT8231)	+= vt8231.o
 obj-$(CONFIG_SENSORS_W83627EHF)	+= w83627ehf.o
 obj-$(CONFIG_SENSORS_W83L785TS)	+= w83l785ts.o
+obj-$(CONFIG_SENSORS_W83L786NG)	+= w83l786ng.o
 
 ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
 EXTRA_CFLAGS += -DDEBUG