diff options
| author | Tino Liu <tino.liu@quanta.corp-partner.google.com> | 2018-06-21 19:16:08 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-07-04 02:01:53 -0700 |
| commit | a84165968ca78fe7d783e522f79dd01abc6303fd (patch) | |
| tree | 3a81a56a7c69e92fac4fb61e2dfc6e1452ea0c7e /include/fan.h | |
| parent | fec3c3c7ec17aaa92332b3128ce3afd352585bed (diff) | |
| download | chrome-ec-a84165968ca78fe7d783e522f79dd01abc6303fd.tar.gz | |
NPCX/fan: Update rpm_actual in duty mode
For npcx, this patch makes rpm_actual updated at every hook_tick
when fan is in duty mode (in addition to rpm mode).
It also sets fan_status to LOCKED if rpm_actual > 0.
BUG=b:110451144
BRANCH=master
TEST=After `fanduty <percent>`, `faninfo` can see actual rpm being updated.
Verify that `fanduty` doesn't impact `fanset`.
Change-Id: I3685ca2b8e51d5dd12974c83656c88fecae1932c
Signed-off-by: Tino Liu <tino.liu@quanta.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/1111477
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Vincent Wang <vwang@chromium.org>
Diffstat (limited to 'include/fan.h')
| -rw-r--r-- | include/fan.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/fan.h b/include/fan.h index 86c2822f80..5a2e010e18 100644 --- a/include/fan.h +++ b/include/fan.h @@ -88,7 +88,23 @@ int fan_get_rpm_target(int ch); /* Is the fan stalled when it shouldn't be? */ int fan_is_stalled(int ch); -/* How is the automatic RPM control doing? */ +/** + * STOPPED means not spinning. + * + * When setting fan rpm, some implementations in chip layer (npcx and it83xx) + * is to adjust fan pwm duty steps by steps. In this period, fan_status will + * be marked as CHANGING. After change is done, fan_status will become LOCKED. + * + * In the period of changing pwm duty, if it's trying to increase/decrease duty + * even when duty is already in upper/lower bound. Then this action won't work, + * and fan_status will be marked as FRUSTRATED. + * + * For other implementations in chip layer (mchp and mec1322), there is no + * changing period. So they don't have CHANGING status. + * Just return status as LOCKED in normal spinning case, return STOPPED when + * not spinning, return FRUSTRATED when the related flags (which is read from + * chip's register) is set. + */ enum fan_status { FAN_STATUS_STOPPED = 0, FAN_STATUS_CHANGING = 1, |