hwmon: (pmbus) Add support for TI TPS40400 and TPS40422

TPS40400 and TPS40422 are supported by the generic PMBus driver.
Add device IDs and data sheet references.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/pmbus

@@ -22,6 +22,12 @@ Supported chips:
 	http://www.lineagepower.com/oem/pdf/PDT006A0X.pdf
 	http://www.lineagepower.com/oem/pdf/PDT012A0X.pdf
 	http://www.lineagepower.com/oem/pdf/UDT020A0X.pdf
+  * Texas Instruments TPS40400, TPS40422
+    Prefixes: 'tps40400', 'tps40422'
+    Addresses scanned: -
+    Datasheets:
+	http://www.ti.com/lit/gpn/tps40400
+	http://www.ti.com/lit/gpn/tps40422
   * Generic PMBus devices
     Prefix: 'pmbus'
     Addresses scanned: -

drivers/hwmon/pmbus/Kconfig

@@ -20,7 +20,7 @@ config SENSORS_PMBUS
 	help
 	  If you say yes here you get hardware monitoring support for generic
 	  PMBus devices, including but not limited to ADP4000, BMR453, BMR454,
-	  NCP4200, and NCP4208.
+	  NCP4200, NCP4208, TPS40400, and TPS40422.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called pmbus.

drivers/hwmon/pmbus/pmbus.c

@@ -191,6 +191,8 @@ static const struct i2c_device_id pmbus_id[] = {
 	{"pdt006", 1},
 	{"pdt012", 1},
 	{"pmbus", 0},
+	{"tps40400", 1},
+	{"tps40422", 2},
 	{"udt020", 1},
 	{}
 };