hwmon: (lm90) Fix max6696 alarm handling

Bit 2 of status register 2 on MAX6696 (external diode 2 open)
sets ALERT; the bit thus has to be listed in alert_alarms.
Also display a message in the alert handler if the condition
is encountered.

Even though not all overtemperature conditions cause ALERT
to be set, we should not ignore them in the alert handler.
Display messages for all out-of-range conditions.

Reported-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index cdff74282955a9005fa2d8ea648866f21b59055c..14e36c114d611e63203a82ed022d5c303cfde39a 100644 (file)
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -278,7 +278,7 @@ static const struct lm90_params lm90_params[] = {
        [max6696] = {
                .flags = LM90_HAVE_EMERGENCY
                  | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
-               .alert_alarms = 0x187c,
+               .alert_alarms = 0x1c7c,
                .max_convrate = 6,
                .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
        },
@@ -1500,19 +1500,22 @@ static void lm90_alert(struct i2c_client *client, unsigned int flag)
        if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
                dev_info(&client->dev, "Everything OK\n");
        } else {
-               if (alarms & 0x61)
+               if ((alarms & 0x61) || (alarms2 & 0x80))
                        dev_warn(&client->dev,
                                 "temp%d out of range, please check!\n", 1);
-               if (alarms & 0x1a)
+               if ((alarms & 0x1a) || (alarms2 & 0x20))
                        dev_warn(&client->dev,
                                 "temp%d out of range, please check!\n", 2);
                if (alarms & 0x04)
                        dev_warn(&client->dev,
                                 "temp%d diode open, please check!\n", 2);
 
-               if (alarms2 & 0x18)
+               if (alarms2 & 0x5a)
                        dev_warn(&client->dev,
                                 "temp%d out of range, please check!\n", 3);
+               if (alarms2 & 0x04)
+                       dev_warn(&client->dev,
+                                "temp%d diode open, please check!\n", 3);
 
                /*
                 * Disable ALERT# output, because these chips don't implement