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1f091487b2
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>
41 lines
928 B
C
41 lines
928 B
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Power LED control for Chrome EC */
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#ifndef __CROS_EC_POWER_LED_H
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#define __CROS_EC_POWER_LED_H
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#include "common.h"
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enum powerled_color {
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POWERLED_OFF = 0,
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POWERLED_RED,
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POWERLED_YELLOW,
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POWERLED_GREEN,
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POWERLED_COLOR_COUNT /* Number of colors, not a color itself */
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};
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enum powerled_state {
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POWERLED_STATE_OFF,
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POWERLED_STATE_ON,
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POWERLED_STATE_SUSPEND,
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POWERLED_STATE_COUNT
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};
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enum powerled_config {
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POWERLED_CONFIG_MANUAL_OFF,
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POWERLED_CONFIG_MANUAL_ON,
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POWERLED_CONFIG_PWM,
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};
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/* Set the power adapter LED to the specified color. */
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int powerled_set(enum powerled_color color);
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/* Set the power LED according to the specified state. */
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void powerled_set_state(enum powerled_state state);
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#endif /* __CROS_EC_POWER_LED_H */
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