The adm1278 temperature sysfs attribute need it for one of the openbmc platform 
. 
This functionality is not enabled by default, so PMON_CONFIG needs to be 
modified in order to enable it.

Signed-off-by   : Manikandan Elumalai <manikandan.hcl.ers....@gmail.com>

v2:
   - Add Signed-off-by.
   - Removed ADM1278_TEMP1_EN check.
---
 drivers/hwmon/pmbus/adm1275.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 5caa37fb..ab5fceb 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -666,7 +666,23 @@ static int adm1275_probe(struct i2c_client *client,
                tindex = 3;
 
                info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
-                       PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
+                       PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
+                       PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
+
+               config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
+               if (config < 0)
+                       return config;
+
+               /* Enable TEMP1 by default */
+               config |= ADM1278_TEMP1_EN;
+               ret = i2c_smbus_write_byte_data(client,
+                                       ADM1275_PMON_CONFIG,
+                                       config);
+               if (ret < 0) {
+               dev_err(&client->dev,
+                       "Failed to enable temperature config\n");
+               return -ENODEV;
+               }
 
                /* Enable VOUT if not enabled (it is disabled by default) */
                if (!(config & ADM1278_VOUT_EN)) {
@@ -681,9 +697,6 @@ static int adm1275_probe(struct i2c_client *client,
                        }
                }
 
-               if (config & ADM1278_TEMP1_EN)
-                       info->func[0] |=
-                               PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
                if (config & ADM1278_VIN_EN)
                        info->func[0] |= PMBUS_HAVE_VIN;
                break;
-- 
2.7.4

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