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authorJean Delvare <khali@linux-fr.org>2008-10-17 17:51:09 +0200
committerJean Delvare <khali@mahadeva.delvare>2008-10-17 17:51:09 +0200
commitf65e17086fc141bee1592bbf6e709e9c7a43541b (patch)
tree165e6da0dc246a02907108316fe12c5d6af4d2e6 /Documentation
parent6388a388ffb720f40fc8046c261252ea2be9c12f (diff)
downloadlinux-linaro-stable-f65e17086fc141bee1592bbf6e709e9c7a43541b.tar.gz
hwmon: (lm90) Support the extra resolution bits of MAX6657
The Maxim MAX6657, MAX6658 and MAX6659 have extra resolution bits for the local temperature measurement. Let the lm90 driver read them and export them to user-space. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Martyn Welch <martyn.welch@gefanuc.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/lm9010
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
index aa4a0ec20081..0b3e8bb7c1f0 100644
--- a/Documentation/hwmon/lm90
+++ b/Documentation/hwmon/lm90
@@ -86,9 +86,8 @@ family is that it features critical limits with hysteresis, and an
increased resolution of the remote temperature measurement.
The different chipsets of the family are not strictly identical, although
-very similar. This driver doesn't handle any specific feature for now,
-with the exception of SMBus PEC. For reference, here comes a non-exhaustive
-list of specific features:
+very similar. For reference, here comes a non-exhaustive list of specific
+features:
LM90:
* Filter and alert configuration register at 0xBF.
@@ -114,9 +113,11 @@ ADT7461:
* Lower resolution for remote temperature
MAX6657 and MAX6658:
+ * Better local resolution
* Remote sensor type selection
MAX6659:
+ * Better local resolution
* Selectable address
* Second critical temperature limit
* Remote sensor type selection
@@ -127,7 +128,8 @@ MAX6680 and MAX6681:
All temperature values are given in degrees Celsius. Resolution
is 1.0 degree for the local temperature, 0.125 degree for the remote
-temperature.
+temperature, except for the MAX6657, MAX6658 and MAX6659 which have a
+resolution of 0.125 degree for both temperatures.
Each sensor has its own high and low limits, plus a critical limit.
Additionally, there is a relative hysteresis value common to both critical