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>

3 files changed, 12 insertions, 5 deletions

diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75
index 5e45d0795986..2560a9c6d445 100644
--- a/Documentation/hwmon/lm75
+++ b/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
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 9c333d471433..0428e8a74b19 100644
--- a/drivers/hwmon/Kconfig
+++ b/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
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 928341115793..c03b490bba81 100644
--- a/drivers/hwmon/lm75.c
+++ b/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, },