powerpc/therm_adt746x: Don't access non-existing register

The ADT746x don't have any register at sub-address 0, so better use an
existing register for the initial test read.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Colin Leroy <colin@colino.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index 556f0feaa4df..95b676a19be7 100644
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -387,7 +387,7 @@ static int probe_thermostat(struct i2c_client *client,
         i2c_set_clientdata(client, th);
         th->clt = client;
 
-        rc = read_reg(th, 0);
+        rc = read_reg(th, CONFIG_REG);
         if (rc < 0) {
                 dev_err(&client->dev, "Thermostat failed to read config!\n");
                 kfree(th);