path: root/Documentation
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authorJean Delvare <khali@linux-fr.org>2012-01-16 22:51:47 +0100
committerJean Delvare <khali@endymion.delvare>2012-01-16 22:51:47 +0100
commitd216f6809eb690b9a888c286cde68cda4d0c4cfa (patch)
tree46a83526ded3df6713a0d41514adb1ad465b969f /Documentation
parentd93ab7807063ade8ad4b3ba55347e333dbde4d52 (diff)
hwmon: (lm63) Expose automatic fan speed control lookup table
The LM63 and compatible devices have a lookup table to control the fan speed automatically. Expose it in sysfs. Values are cached for 5 seconds, independently of the other register values to avoid slowing down "sensors". We might make the table values writable in the future. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'Documentation')
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/hwmon/lm63 b/Documentation/hwmon/lm63
index df3e1ae42f39..4d30d209881a 100644
--- a/Documentation/hwmon/lm63
+++ b/Documentation/hwmon/lm63
@@ -66,7 +66,8 @@ supported either.
The lm63 driver will not update its values more frequently than configured with
the update_interval sysfs attribute; reading them more often will do no harm,
-but will return 'old' values.
+but will return 'old' values. Values in the automatic fan control lookup table
+(attributes pwm1_auto_*) have their own independent lifetime of 5 seconds.
The LM64 is effectively an LM63 with GPIO lines. The driver does not
support these GPIO lines at present.