path: root/Documentation/hwmon
diff options
authorGuenter Roeck <>2014-05-12 11:10:56 -0700
committerGuenter Roeck <>2014-05-21 16:02:24 -0700
commit84899d394e755989a1cc080083080f7695c36467 (patch)
tree0a7c3e8ea182b8c23c1b4599d55117b8a1c5eefc /Documentation/hwmon
parent03f49f641ab70b2ceea674e666f5b933e3bc5d27 (diff)
hwmon: (emc1403) Make all hyst attributes except for temp1_crit_hyst read-only
All chips in this chip series only support a single hysteresis value. Having multiple writable hysteresis attributes is therefore confusing, since a single write affects all hysteresis temperatures. Make all but one (temp1_crit_hyst) read-only. Reviewed-by: Jean Delvare <> Signed-off-by: Guenter Roeck <>
Diffstat (limited to 'Documentation/hwmon')
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/hwmon/emc1403 b/Documentation/hwmon/emc1403
index b109e35e2385..a869b0ef6a9d 100644
--- a/Documentation/hwmon/emc1403
+++ b/Documentation/hwmon/emc1403
@@ -51,6 +51,9 @@ This implementation detail implies the following:
was 80 degrees C, and the hysteresis was 75 degrees C, and you change
the critical limit to 90 degrees C, then the hysteresis will
automatically change to 85 degrees C.
-* While hysteresis limits can be set for all critical limits, setting a single
- hysteresis value affects the hysteresis values for all limits on all sensors.
+* The hysteresis values can't be set independently. We decided to make
+ only temp1_crit_hyst writable, while all other hysteresis attributes
+ are read-only. Setting temp1_crit_hyst writes the difference between
+ temp1_crit_hyst and temp1_crit into the chip, and the same relative
+ hysteresis applies automatically to all other limits.
* The limits should be set before the hysteresis.