Bill Richardson 497e292542 Start separating LM4 pwm logic from fan logic. ...

On the LM4, all pwm functions are implemented through hardware "fan"
modules. This change abstracts the hardware fan stuff from the higher level
pwm and fan control logic. Those are still chip-specific at the moment, but
may be moved into common with a future CL.

BUG=chrome-os-partner:23530
BRANCH=none
TEST=manual

Code refactoring only, no new behavior. All tests build and pass, and I
tested on Link with some manual pwm and fan commands on the EC console.

> fanduty 30
> faninfo

Should report ~4500 RPM

> fanset 7000
> faninfo

Should report ~48% duty cycle.

> fanauto

Back to automatic control.

> kblight 0
> kblight 10
> kblight 50
> kblight 100

Keyboard backlight should glow appropriately.

Change-Id: I7558f36b2626e555fc8dabdd12660fa484a93b7f
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174991
Reviewed-by: Randall Spangler <rspangler@chromium.org>

2013-10-30 01:03:43 +00:00

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