hwmon: (lm90) Fix max6696 alarm handling

commit e41fae2b1ed8c78283d73651cd65be0228c0dd1c upstream.

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>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 8eeb141c85ac..74813130d211 100644
--- 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