hwmon: (lm90) Add support for ADT7461A and NCT1008

This patch adds support for ADT7461A and NCT1008 to the lm90 driver.
Both chips have identical functionality and report the same manufacturing ID
and device ID values.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

2 files changed, 19 insertions, 11 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 060ef6327876..92d02512bcde 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -618,10 +618,10 @@ config SENSORS_LM90
         depends on I2C
         help
           If you say yes here you get support for National Semiconductor LM90,
-          LM86, LM89 and LM99, Analog Devices ADM1032 and ADT7461, Maxim
-          MAX6646, MAX6647, MAX6648, MAX6649, MAX6657, MAX6658, MAX6659,
-          MAX6680, MAX6681, MAX6692, MAX6695, MAX6696, and Winbond/Nuvoton
-          W83L771W/G/AWG/ASG sensor chips.
+          LM86, LM89 and LM99, Analog Devices ADM1032, ADT7461, and ADT7461A,
+          Maxim MAX6646, MAX6647, MAX6648, MAX6649, MAX6657, MAX6658, MAX6659,
+          MAX6680, MAX6681, MAX6692, MAX6695, MAX6696, ON Semiconductor NCT1008,
+          and Winbond/Nuvoton W83L771W/G/AWG/ASG sensor chips.
 
           This driver can also be built as a module.  If so, the module
           will be called lm90.
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index c43b4e9f96a9..2f94f9504804 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -49,10 +49,10 @@
  * chips, but support three temperature sensors instead of two. MAX6695
  * and MAX6696 only differ in the pinout so they can be treated identically.
  *
- * This driver also supports the ADT7461 chip from Analog Devices.
- * It's supported in both compatibility and extended mode. It is mostly
- * compatible with LM90 except for a data format difference for the
- * temperature value registers.
+ * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
+ * NCT1008 from ON Semiconductor. The chips are supported in both compatibility
+ * and extended mode. They are mostly compatible with LM90 except for a data
+ * format difference for the temperature value registers.
  *
  * Since the LM90 was the first chipset supported by this driver, most
  * comments will refer to this chipset, but are actually general and
@@ -88,9 +88,10 @@
  * Addresses to scan
  * Address is fully defined internally and cannot be changed except for
  * MAX6659, MAX6680 and MAX6681.
- * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6649, MAX6657,
- * MAX6658 and W83L771 have address 0x4c.
- * ADM1032-2, ADT7461-2, LM89-1, LM99-1 and MAX6646 have address 0x4d.
+ * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
+ * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
+ * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
+ * have address 0x4d.
  * MAX6647 has address 0x4e.
  * MAX6659 can have address 0x4c, 0x4d or 0x4e.
  * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
@@ -174,6 +175,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
 static const struct i2c_device_id lm90_id[] = {
         { "adm1032", adm1032 },
         { "adt7461", adt7461 },
+        { "adt7461a", adt7461 },
         { "lm90", lm90 },
         { "lm86", lm86 },
         { "lm89", lm86 },
@@ -188,6 +190,7 @@ static const struct i2c_device_id lm90_id[] = {
         { "max6681", max6680 },
         { "max6695", max6696 },
         { "max6696", max6696 },
+        { "nct1008", adt7461 },
         { "w83l771", w83l771 },
         { }
 };
@@ -1153,6 +1156,11 @@ static int lm90_detect(struct i2c_client *new_client,
                  && (reg_config1 & 0x1B) == 0x00
                  && reg_convrate <= 0x0A) {
                         name = "adt7461";
+                } else
+                if (chip_id == 0x57 /* ADT7461A, NCT1008 */
+                 && (reg_config1 & 0x1B) == 0x00
+                 && reg_convrate <= 0x0A) {
+                        name = "adt7461a";
                 }
         } else
         if (man_id == 0x4D) { /* Maxim */