hwmon: (lm73) Add support for max/min alarms

Add support for temp1_min_alarm and temp1_max_alarm

Signed-off-by: Chris Verges <kg4ysn@gmail.com>
[linux@roeck-us.net: cleanup; dropped platform data and interrupt support]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/Documentation/hwmon/lm73 b/Documentation/hwmon/lm73
index 782b3e1055ca..8af059dcb642 100644
--- a/Documentation/hwmon/lm73
+++ b/Documentation/hwmon/lm73
@@ -77,3 +77,14 @@ via the following function:
 
 where 'x' is the output from 'update_interval' and 'g(x)' is the
 resolution in degrees C per LSB.
+
+Alarm Support
+-------------
+
+The LM73 features a simple over-temperature alarm mechanism.  This
+feature is exposed via the sysfs attributes.
+
+The attributes 'temp1_max_alarm' and 'temp1_min_alarm' are flags
+provided by the LM73 that indicate whether the measured temperature has
+passed the 'temp1_max' and 'temp1_min' thresholds, respectively.  These
+values _must_ be read to clear the registers on the LM73.