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hwmon: (lm63) Expose automatic fan speed control lookup table

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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>
This commit is contained in:
Jean Delvare
2012-01-16 22:51:47 +01:00
committed by Jean Delvare
parent d93ab78070
commit d216f6809e
2 changed files with 136 additions and 15 deletions
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Documentation/hwmon/lm63
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@@ -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.