hwmon/w83793: Fix the fan input detection

Catch the cases when alternative pins are used to route the
fan9-12 input.

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Gong Jun <jgong@winbond.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index c2b7834ecaa9..7cadef8cd87d 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -1327,6 +1327,20 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
                 data->has_pwm |= 0x80;
         }
 
+        tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
+        if ((tmp & 0x01) && (val & 0x08)) {     /* fan 9, second location */
+                data->has_fan |= 0x100;
+        }
+        if ((tmp & 0x02) && (val & 0x10)) {     /* fan 10, second location */
+                data->has_fan |= 0x200;
+        }
+        if ((tmp & 0x04) && (val & 0x20)) {     /* fan 11, second location */
+                data->has_fan |= 0x400;
+        }
+        if ((tmp & 0x08) && (val & 0x40)) {     /* fan 12, second location */
+                data->has_fan |= 0x800;
+        }
+
         /* check the temp1-6 mode, ignore former AMDSI selected inputs */
         tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[0]);
         if (tmp & 0x01)