hwmon: fix detection of abituguru volt inputs

This patch fixes the detection of volt inputs with a reading of more then 240
units.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

1 files changed, 18 insertions, 8 deletions

diff --git a/drivers/hwmon/abituguru.c b/drivers/hwmon/abituguru.c
index 11a40da13535..0770688f79b6 100644
--- a/drivers/hwmon/abituguru.c
+++ b/drivers/hwmon/abituguru.c
@@ -418,7 +418,7 @@ static int __devinit
 abituguru_detect_bank1_sensor_type(struct abituguru_data *data,
                                    u8 sensor_addr)
 {
-        u8 val, buf[3];
+        u8 val, test_flag, buf[3];
         int i, ret = -ENODEV; /* error is the most common used retval :| */
 
         /* If overriden by the user return the user selected type */
@@ -436,7 +436,7 @@ abituguru_detect_bank1_sensor_type(struct abituguru_data *data,
                 return -ENODEV;
 
         /* Test val is sane / usable for sensor type detection. */
-        if ((val < 10u) || (val > 240u)) {
+        if ((val < 10u) || (val > 250u)) {
                 printk(KERN_WARNING ABIT_UGURU_NAME
                         ": bank1-sensor: %d reading (%d) too close to limits, "
                         "unable to determine sensor type, skipping sensor\n",
@@ -449,10 +449,20 @@ abituguru_detect_bank1_sensor_type(struct abituguru_data *data,
 
         ABIT_UGURU_DEBUG(2, "testing bank1 sensor %d\n", (int)sensor_addr);
         /* Volt sensor test, enable volt low alarm, set min value ridicously
-           high. If its a volt sensor this should always give us an alarm. */
-        buf[0] = ABIT_UGURU_VOLT_LOW_ALARM_ENABLE;
-        buf[1] = 245;
-        buf[2] = 250;
+           high, or vica versa if the reading is very high. If its a volt
+           sensor this should always give us an alarm. */
+        if (val <= 240u) {
+                buf[0] = ABIT_UGURU_VOLT_LOW_ALARM_ENABLE;
+                buf[1] = 245;
+                buf[2] = 250;
+                test_flag = ABIT_UGURU_VOLT_LOW_ALARM_FLAG;
+        } else {
+                buf[0] = ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE;
+                buf[1] = 5;
+                buf[2] = 10;
+                test_flag = ABIT_UGURU_VOLT_HIGH_ALARM_FLAG;
+        }
+
         if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr,
                         buf, 3) != 3)
                 goto abituguru_detect_bank1_sensor_type_exit;
@@ -469,13 +479,13 @@ abituguru_detect_bank1_sensor_type(struct abituguru_data *data,
                                 sensor_addr, buf, 3,
                                 ABIT_UGURU_MAX_RETRIES) != 3)
                         goto abituguru_detect_bank1_sensor_type_exit;
-                if (buf[0] & ABIT_UGURU_VOLT_LOW_ALARM_FLAG) {
+                if (buf[0] & test_flag) {
                         ABIT_UGURU_DEBUG(2, "  found volt sensor\n");
                         ret = ABIT_UGURU_IN_SENSOR;
                         goto abituguru_detect_bank1_sensor_type_exit;
                 } else
                         ABIT_UGURU_DEBUG(2, "  alarm raised during volt "
-                                "sensor test, but volt low flag not set\n");
+                                "sensor test, but volt range flag not set\n");
         } else
                 ABIT_UGURU_DEBUG(2, "  alarm not raised during volt sensor "
                         "test\n");