diff options
| author | Bill Richardson <wfrichar@chromium.org> | 2012-06-22 14:15:26 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-06-22 15:56:57 -0700 |
| commit | 80c635ecabdd398c20441cfd4dadb00c7eb76720 (patch) | |
| tree | 604ec5789631b4f4514449c858d017f23e72fe73 /include/pwm.h | |
| parent | e61af38f55525177393a1e915fca45ef1c983411 (diff) | |
| download | chrome-ec-80c635ecabdd398c20441cfd4dadb00c7eb76720.tar.gz | |
Add 'fanduty' command both EC console and ectool.
This forces the fan PWM duty cycle to a fixed percentage (0-100). It's only
used for airflow testing.
BUG=chrome-os-partner:10747
TEST=manual
Using this ectool, try
ectool fanduty 0
ectool pwmgetfanrpm
ectool fanduty 50
ectool pwmgetfanrpm
ectool fanduty 100
ectool pwmgetfanrpm
You should see (and hear) the fan speed up. If you have an EC console, you
can run
faninfo
and it should show that the 'Target:' is unrelated to the 'Actual:' value.
Change-Id: Iac332fb3ba63f96726cf7f64061b3ce22d2e76fd
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/25965
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'include/pwm.h')
| -rw-r--r-- | include/pwm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/pwm.h b/include/pwm.h index 356b080532..0d21769233 100644 --- a/include/pwm.h +++ b/include/pwm.h @@ -23,6 +23,9 @@ int pwm_get_fan_target_rpm(void); /* Set the target fan RPM. Pass -1 to set fan to maximum. */ int pwm_set_fan_target_rpm(int rpm); +/* Set the fan PWM duty cycle (0-100), disabling the automatic control. */ +int pwm_set_fan_duty(int percent); + /* Enable/disable the keyboard backlight. */ int pwm_enable_keyboard_backlight(int enable); |