hwmon: (lm75) Add support for the Dallas/Maxim DS7505

Basically it's the same as the original DS75 but much faster.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/lm75

@@ -12,11 +12,11 @@ Supported chips:
     Addresses scanned: I2C 0x48 - 0x4f
     Datasheet: Publicly available at the National Semiconductor website
                http://www.national.com/
-  * Dallas Semiconductor DS75, DS1775
-    Prefixes: 'ds75', 'ds1775'
+  * Dallas Semiconductor (now Maxim) DS75, DS1775, DS7505
+    Prefixes: 'ds75', 'ds1775', 'ds7505'
     Addresses scanned: none
-    Datasheet: Publicly available at the Dallas Semiconductor website
-               http://www.maxim-ic.com/
+    Datasheet: Publicly available at the Maxim website
+               http://www.maximintegrated.com/
   * Maxim MAX6625, MAX6626
     Prefixes: 'max6625', 'max6626'
     Addresses scanned: none

drivers/hwmon/Kconfig

@@ -630,7 +630,7 @@ config SENSORS_LM75
 	  temperature sensor chip, with models including:
 
 		- Analog Devices ADT75
-		- Dallas Semiconductor DS75 and DS1775
+		- Dallas Semiconductor DS75, DS1775 and DS7505
 		- Maxim MAX6625 and MAX6626
 		- Microchip MCP980x
 		- National Semiconductor LM75, LM75A

drivers/hwmon/lm75.c

@@ -38,6 +38,7 @@ enum lm75_type {		/* keep sorted in alphabetical order */
 	adt75,
 	ds1775,
 	ds75,
+	ds7505,
 	lm75,
 	lm75a,
 	max6625,
@@ -202,6 +203,11 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		data->resolution = 11;
 		data->sample_time = HZ;
 		break;
+	case ds7505:
+		set_mask |= 3 << 5;		/* 12-bit mode */
+		data->resolution = 12;
+		data->sample_time = HZ / 4;
+		break;
 	case lm75:
 	case lm75a:
 		data->resolution = 9;
@@ -289,6 +295,7 @@ static const struct i2c_device_id lm75_ids[] = {
 	{ "adt75", adt75, },
 	{ "ds1775", ds1775, },
 	{ "ds75", ds75, },
+	{ "ds7505", ds7505, },
 	{ "lm75", lm75, },
 	{ "lm75a", lm75a, },
 	{ "max6625", max6625, },