1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 956cd553c711..de62f60bcaf1 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -1202,6 +1202,22 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
                 data->manual_pwm_ctl[i] = 0xff;
         }
 
+        /* Some chips seem to have default value 0xff for all limit
+         * registers. For low voltage limits it makes no sense and triggers
+         * alarms, so change to 0 instead. For high temperature limits, it
+         * means -1 degree C, which surprisingly doesn't trigger an alarm,
+         * but is still confusing, so change to 127 degrees C. */
+        for (i = 0; i < 8; i++) {
+                tmp = it87_read_value(client, IT87_REG_VIN_MIN(i));
+                if (tmp == 0xff)
+                        it87_write_value(client, IT87_REG_VIN_MIN(i), 0);
+        }
+        for (i = 0; i < 3; i++) {
+                tmp = it87_read_value(client, IT87_REG_TEMP_HIGH(i));
+                if (tmp == 0xff)
+                        it87_write_value(client, IT87_REG_TEMP_HIGH(i), 127);
+        }
+
         /* Check if temperature channnels are reset manually or by some reason */
         tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
         if ((tmp & 0x3f) == 0) {