3 files changed, 28 insertions, 4 deletions

diff --git a/Documentation/hwmon/lm93 b/Documentation/hwmon/lm93
index 7a10616d0b44..f3b2ad2ceb01 100644
--- a/Documentation/hwmon/lm93
+++ b/Documentation/hwmon/lm93
@@ -6,6 +6,10 @@ Supported chips:
     Prefix 'lm93'
     Addresses scanned: I2C 0x2c-0x2e
     Datasheet: http://www.national.com/ds.cgi/LM/LM93.pdf
+  * National Semiconductor LM94
+    Prefix 'lm94'
+    Addresses scanned: I2C 0x2c-0x2e
+    Datasheet: http://www.national.com/ds.cgi/LM/LM94.pdf
 
 Authors:
         Mark M. Hoffman <mhoffman@lightlink.com>
@@ -56,6 +60,9 @@ previous motherboard management ASICs and uses some of the LM85's features
 for dynamic Vccp monitoring and PROCHOT. It is designed to monitor a dual
 processor Xeon class motherboard with a minimum of external components.
 
+LM94 is also supported in LM93 compatible mode. Extra sensors and features of
+LM94 are not supported.
+
 
 User Interface
 --------------
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 35f00dae3676..773e484f1646 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -618,8 +618,8 @@ config SENSORS_LM93
         depends on I2C
         select HWMON_VID
         help
-          If you say yes here you get support for National Semiconductor LM93
-          sensor chips.
+          If you say yes here you get support for National Semiconductor LM93,
+          LM94, and compatible sensor chips.
 
           This driver can also be built as a module.  If so, the module
           will be called lm93.
diff --git a/drivers/hwmon/lm93.c b/drivers/hwmon/lm93.c
index c9ed14eba5a6..3b43df418613 100644
--- a/drivers/hwmon/lm93.c
+++ b/drivers/hwmon/lm93.c
@@ -135,6 +135,11 @@
 #define LM93_MFR_ID             0x73
 #define LM93_MFR_ID_PROTOTYPE   0x72
 
+/* LM94 REGISTER VALUES */
+#define LM94_MFR_ID_2           0x7a
+#define LM94_MFR_ID             0x79
+#define LM94_MFR_ID_PROTOTYPE   0x78
+
 /* SMBus capabilities */
 #define LM93_SMBUS_FUNC_FULL (I2C_FUNC_SMBUS_BYTE_DATA | \
                 I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA)
@@ -2504,6 +2509,7 @@ static int lm93_detect(struct i2c_client *client, struct i2c_board_info *info)
 {
         struct i2c_adapter *adapter = client->adapter;
         int mfr, ver;
+        const char *name;
 
         if (!i2c_check_functionality(adapter, LM93_SMBUS_FUNC_MIN))
                 return -ENODEV;
@@ -2517,13 +2523,23 @@ static int lm93_detect(struct i2c_client *client, struct i2c_board_info *info)
         }
 
         ver = lm93_read_byte(client, LM93_REG_VER);
-        if (ver != LM93_MFR_ID && ver != LM93_MFR_ID_PROTOTYPE) {
+        switch (ver) {
+        case LM93_MFR_ID:
+        case LM93_MFR_ID_PROTOTYPE:
+                name = "lm93";
+                break;
+        case LM94_MFR_ID_2:
+        case LM94_MFR_ID:
+        case LM94_MFR_ID_PROTOTYPE:
+                name = "lm94";
+                break;
+        default:
                 dev_dbg(&adapter->dev,
                         "detect failed, bad version id 0x%02x!\n", ver);
                 return -ENODEV;
         }
 
-        strlcpy(info->type, "lm93", I2C_NAME_SIZE);
+        strlcpy(info->type, name, I2C_NAME_SIZE);
         dev_dbg(&adapter->dev,"loading %s at %d,0x%02x\n",
                 client->name, i2c_adapter_id(client->adapter),
                 client->addr);
@@ -2602,6 +2618,7 @@ static int lm93_remove(struct i2c_client *client)
 
 static const struct i2c_device_id lm93_id[] = {
         { "lm93", 0 },
+        { "lm94", 0 },
         { }
 };
 MODULE_DEVICE_TABLE(i2c, lm93_id);