hwmon: (tmp421) Add support for TMP441 and TMP442

TMP441 and TMP442 are compatible to TMP421 and TMP422.

Signed-off-by: Guenter Roeck <[e-mail]>
Reviewed-by: Jean Delvare <[e-mail]>

Documentation/hwmon/tmp421

···
     Prefix: 'tmp423'
     Addresses scanned: I2C 0x4c and 0x4d
     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
+  * Texas Instruments TMP441
+    Prefix: 'tmp441'
+    Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
+    Datasheet: http://www.ti.com/product/tmp441
+  * Texas Instruments TMP442
+    Prefix: 'tmp442'
+    Addresses scanned: I2C 0x4c and 0x4d
+    Datasheet: http://www.ti.com/product/tmp442
 
 Authors:
 	Andre Prendel <[e-mail]>
···
 Description
 -----------
 
-This driver implements support for Texas Instruments TMP421, TMP422
-and TMP423 temperature sensor chips. These chips implement one local
-and up to one (TMP421), up to two (TMP422) or up to three (TMP423)
-remote sensors. Temperature is measured in degrees Celsius. The chips
-are wired over I2C/SMBus and specified over a temperature range of -40
-to +125 degrees Celsius. Resolution for both the local and remote
-channels is 0.0625 degree C.
+This driver implements support for Texas Instruments TMP421, TMP422,
+TMP423, TMP441, and TMP442 temperature sensor chips. These chips
+implement one local and up to one (TMP421, TMP441), up to two (TMP422,
+TMP442) or up to three (TMP423) remote sensors. Temperature is measured
+in degrees Celsius. The chips are wired over I2C/SMBus and specified
+over a temperature range of -40 to +125 degrees Celsius. Resolution
+for both the local and remote channels is 0.0625 degree C.
 
 The chips support only temperature measurement. The driver exports
 the temperature values via the following sysfs files:

drivers/hwmon/Kconfig

···
 	depends on I2C
 	help
 	  If you say yes here you get support for Texas Instruments TMP421,
-	  TMP422 and TMP423 temperature sensor chips.
+	  TMP422, TMP423, TMP441, and TMP442 temperature sensor chips.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called tmp421.

drivers/hwmon/tmp421.c

···
 
 /*
  * Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.
- * Supported models: TMP421, TMP422, TMP423
+ * Supported models: TMP421, TMP422, TMP423, TMP441, TMP442
  */
 
 #include <linux/module.h>
···
 static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f,
 					     I2C_CLIENT_END };
 
-enum chips { tmp421, tmp422, tmp423 };
+enum chips { tmp421, tmp422, tmp423, tmp441, tmp442 };
 
 /* The TMP421 registers */
 #define TMP421_STATUS_REG			0x08
···
 #define TMP421_DEVICE_ID			0x21
 #define TMP422_DEVICE_ID			0x22
 #define TMP423_DEVICE_ID			0x23
+#define TMP441_DEVICE_ID			0x41
+#define TMP442_DEVICE_ID			0x42
 
 static const struct i2c_device_id tmp421_id[] = {
 	{ "tmp421", 2 },
 	{ "tmp422", 3 },
 	{ "tmp423", 4 },
+	{ "tmp441", 2 },
+	{ "tmp442", 3 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, tmp421_id);
···
 {
 	enum chips kind;
 	struct i2c_adapter *adapter = client->adapter;
-	const char *names[] = { "TMP421", "TMP422", "TMP423" };
+	const char * const names[] = { "TMP421", "TMP422", "TMP423",
+				       "TMP441", "TMP442" };
 	int addr = client->addr;
 	u8 reg;
 
···
 		if (addr != 0x4c && addr != 0x4d)
 			return -ENODEV;
 		kind = tmp423;
+		break;
+	case TMP441_DEVICE_ID:
+		kind = tmp441;
+		break;
+	case TMP442_DEVICE_ID:
+		if (addr != 0x4c && addr != 0x4d)
+			return -ENODEV;
+		kind = tmp442;
 		break;
 	default:
 		return -ENODEV;
···
 module_i2c_driver(tmp421_driver);
 
 MODULE_AUTHOR("Andre Prendel <[e-mail]>");
-MODULE_DESCRIPTION("Texas Instruments TMP421/422/423 temperature sensor driver");
+MODULE_DESCRIPTION("Texas Instruments TMP421/422/423/441/442 temperature sensor driver");
 MODULE_LICENSE("GPL");