Support MAX6633, MAX6634, MAX6635 and LM76.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2440 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/chips/SUMMARY

@@ -135,7 +135,13 @@ lm90
 	adm1032		2	-	-	-	yes	no
 
 lm92
+	(all are reported as an "lm92")
 	lm92		1	-	-	-	yes	no
+	max6633		1	-	-	-	yes	no
+	max6634		1	-	-	-	yes	no
+	max6635		1	-	-	-	yes	no
+	(lm76 needs force parameter)
+	lm76		1	-	-	-	yes	no
 
 maxilife
 	maxilife-as	5	4	3	-	yes	no

doc/chips/lm92

@@ -7,6 +7,13 @@ Supported chips:
   * National Semiconductors LM92
     Prefix `lm92'
     Addresses scanned: I2C 0x48 - 0x4b (inclusive)
+  * National Semiconductors LM76
+    Prefix `lm92'
+    Addresses scanned: none, force parameter needed
+  * Maxim MAX6633/MAX6634/MAX6635
+    Prefix `lm92'
+    Addresses scanned: I2C 0x48 - 0x4f (inclusive)
+    MAX6633 with address in 0x40 - 0x47 needs force parameter
 
 Author: Abraham van der Merwe <abraham@2d3d.co.za>
 
@@ -46,6 +53,10 @@ control the thresholds for resetting alarms.
 At the moment the driver controls these sensors in comparator mode and the
 interrupt pins (INT, T_CRIT_A) are ignored.
 
+Support was added later for the LM76 and Maxim MAX6633/MAX6634/MAX6635,
+which are mostly compatible. They have not all been tested, so you
+may need to use the force parameter.
+
 
 Hardware Configurations
 -----------------------

kernel/chips/lm92.c

@@ -107,7 +107,7 @@ static DECLARE_MUTEX (mutex);
 
 /* addresses to scan */
 static unsigned short normal_i2c[] = { SENSORS_I2C_END };
-static unsigned short normal_i2c_range[] = { 0x48, 0x4b, SENSORS_I2C_END };
+static unsigned short normal_i2c_range[] = { 0x48, 0x4f, SENSORS_I2C_END };
 static unsigned int normal_isa[] = { SENSORS_ISA_END };
 static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
 
@@ -231,6 +231,35 @@ static void lm92_alarms (struct i2c_client *client,int operation,int ctl_name,in
 	}
 }
 
+static int max6635_check(struct i2c_client *client)
+{
+	int i;
+	u16 temp_low, temp_high, temp_hyst, temp_crit;
+	u8 conf;
+
+	temp_low = i2c_smbus_read_word_data(client, LM92_REG_TRIP_LOW);
+	temp_high = i2c_smbus_read_word_data(client, LM92_REG_TRIP_HIGH);
+	temp_hyst = i2c_smbus_read_word_data(client, LM92_REG_TRIP_HYSTERESIS);
+	temp_crit = i2c_smbus_read_word_data(client, LM92_REG_TRIP_CRITICAL);
+	
+	if ((temp_low & 0x7f00) || (temp_high & 0x7f00)
+	 || (temp_hyst & 0x7f00) || (temp_crit & 0x7f00))
+		return 0;
+
+	conf = i2c_smbus_read_byte_data(client, LM92_REG_CONFIGURATION);
+
+	for (i=0; i<128; i+=16) {
+		if (temp_low != i2c_smbus_read_word_data(client, LM92_REG_TRIP_LOW + i)
+		 || temp_high != i2c_smbus_read_word_data(client, LM92_REG_TRIP_HIGH + i)
+		 || temp_hyst != i2c_smbus_read_word_data(client, LM92_REG_TRIP_HYSTERESIS + i)
+		 || temp_crit != i2c_smbus_read_word_data(client, LM92_REG_TRIP_CRITICAL + i)
+		 || conf != i2c_smbus_read_byte_data(client, LM92_REG_CONFIGURATION + i))
+			return 0;
+	}
+	
+	return 1;
+}
+
 static int lm92_init_client (struct i2c_client *client)
 {
 	lm92_t *data = (lm92_t *) client->data;
@@ -294,11 +323,18 @@ static int lm92_detect (struct i2c_adapter *adapter,int address,unsigned short f
 		return (-ERESTARTSYS);
 	}
 
-	if ((kind < 0 && lm92_read16 (client,LM92_REG_MANUFACTURER,&manufacturer) < 0) ||
+	if (kind < 0) {
-		manufacturer != LM92_MANUFACTURER_ID) {
+		/* Is it an lm92? */
-		kfree (client);
+		if (address < 0x4c
-		up (&mutex);
+		 && (lm92_read16(client,LM92_REG_MANUFACTURER,&manufacturer) < 0
-		return (-ENODEV);
+		  || manufacturer != LM92_MANUFACTURER_ID)) {
+		  	/* Is it a MAX6635/MAX6635/MAX6635? */
+			if (!max6635_check(client)) {
+				kfree (client);
+				up (&mutex);
+				return (-ENODEV);
+			}
+		}
 	}
 
 	if ((result = i2c_attach_client (client))) {