hwmon: (ds1621) Add DS1731 chip support to ds1621 driver

These changes add DS1731 chip support to the ds1621 driver,
Kconfig, and documentation.

Signed-off-by: Robert Coulson <rob.coulson@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

2 files changed, 8 insertions, 5 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 4f713705d373..683c769a8fca 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -357,6 +357,7 @@ config SENSORS_DS1621
           - Dallas Semiconductor DS1625
           - Maxim Integrated DS1631
           - Maxim Integrated DS1721
+          - Maxim Integrated DS1731
 
           This driver can also be built as a module.  If so, the module
           will be called ds1621.
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index 8e940ad9cb36..591758bb629f 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -10,8 +10,8 @@
  * resolution, a thermal alarm output (Tout), and user-defined minimum
  * and maximum temperature thresholds (TH and TL).
  *
- * The DS1625, DS1631, and DS1721 are pin compatible with the DS1621 and
- * similar in operation, with slight variations as noted in the device
+ * The DS1625, DS1631, DS1721, and DS1731 are pin compatible with the DS1621
+ * and similar in operation, with slight variations as noted in the device
  * datasheets (please refer to www.maximintegrated.com for specific
  * device information).
  *
@@ -47,7 +47,7 @@
 #include <linux/kernel.h>
 
 /* Supported devices */
-enum chips { ds1621, ds1625, ds1631, ds1721 };
+enum chips { ds1621, ds1625, ds1631, ds1721, ds1731 };
 
 /* Insmod parameters */
 static int polarity = -1;
@@ -65,7 +65,7 @@ MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low")
  *   7    6    5    4    3    2    1    0
  * |Done|THF |TLF |NVB | 1  | 0  |POL |1SHOT|
  *
- * - DS1631:
+ * - DS1631, DS1731:
  *   7    6    5    4    3    2    1    0
  * |Done|THF |TLF |NVB | R1 | R0 |POL |1SHOT|
  *
@@ -140,7 +140,7 @@ static inline int DS1621_TEMP_FROM_REG(u16 reg)
  * TEMP: 0.001C/bit (-55C to +125C)
  * REG:
  *  - 1621, 1625: 0.5C/bit
- *  - 1631, 1721: 0.0625C/bit
+ *  - 1631, 1721, 1731: 0.0625C/bit
  * Assume highest resolution and let the bits fall where they may..
  */
 static inline u16 DS1621_TEMP_TO_REG(long temp)
@@ -176,6 +176,7 @@ static void ds1621_init_client(struct i2c_client *client)
                 break;
         case ds1631:
         case ds1721:
+        case ds1731:
                 resol = (new_conf & DS1621_REG_CONFIG_RESOL) >>
                          DS1621_REG_CONFIG_RESOL_SHIFT;
                 data->update_interval = ds1721_convrates[resol];
@@ -406,6 +407,7 @@ static const struct i2c_device_id ds1621_id[] = {
         { "ds1625", ds1625 },
         { "ds1631", ds1631 },
         { "ds1721", ds1721 },
+        { "ds1731", ds1731 },
         { }
 };
 MODULE_DEVICE_TABLE(i2c, ds1621_id);