diff options
| author | David Hendricks <dhendrix@chromium.org> | 2012-08-08 17:28:13 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-08-17 16:55:26 -0700 |
| commit | 1f091487b210125e351c8397186e2012d8a19cb7 (patch) | |
| tree | afd7aa4e91ffad842b05cc415bab7da9e0e31408 /include/power_led.h | |
| parent | c1c3ec56f89bd2bb132e1e360b0aaf43aa77e0d8 (diff) | |
| download | chrome-ec-1f091487b210125e351c8397186e2012d8a19cb7.tar.gz | |
snow/stm32: re-configure power LED on the fly (input vs. pwm)
Usually the power LED is driven by the PWM mode so that its nominal
brightness can be set to a "soft" on value. However, when
the LED is to remain off the LED should be switched to floating
input mode. This reduces voltage leakage.
This CL updates the power_led_task to configure the LED however is
appropriate and adds board functions to re-configure the GPIO.
Signed-off-by: David Hendricks <dhendrix@chromium.org>
BRANCH=snow
BUG=chrome-os-partner:12381
TEST=LED responds as expected in suspend and on/off states, also
tested that leakage is reduced with multimeter
Change-Id: If90ac78aaffe7358cce80dd02ec1423c2cb4f664
Reviewed-on: https://gerrit.chromium.org/gerrit/29705
Reviewed-by: Simon Glass <sjg@chromium.org>
Commit-Ready: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Diffstat (limited to 'include/power_led.h')
| -rw-r--r-- | include/power_led.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/power_led.h b/include/power_led.h index 9301a5fdf5..b255c557bb 100644 --- a/include/power_led.h +++ b/include/power_led.h @@ -25,6 +25,12 @@ enum powerled_state { POWERLED_STATE_COUNT }; +enum powerled_config { + POWERLED_CONFIG_MANUAL_OFF, + POWERLED_CONFIG_MANUAL_ON, + POWERLED_CONFIG_PWM, +}; + /* Set the power adapter LED to the specified color. */ int powerled_set(enum powerled_color color); |