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1de5ac02ec
Holding the power button is currently the best known way to bring the AP back to a state where it is shutdown and not powered. BUG=chrome-os-partner:40826, chrome-os-partner:40677 TEST=Run `apshutdown` on glados, verify that power state machine transitions to G3 after several seconds. Run `powerbtn`, verify that state machine transitions back to S0. BRANCH=None Change-Id: Ia799c5f199127f31bd24907b93946c6289d381f8 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/275060 Reviewed-by: Aaron Durbin <adurbin@chromium.org>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* Copyright (c) 2013 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 button API for Chrome EC */
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#ifndef __CROS_EC_POWER_BUTTON_H
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#define __CROS_EC_POWER_BUTTON_H
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#include "common.h"
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/**
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* Return non-zero if power button is pressed.
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*
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* Uses the debounced button state, not the raw signal from the GPIO.
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*/
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int power_button_is_pressed(void);
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/**
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* Wait for the power button to be released
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*
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* @param timeout_us Timeout in microseconds, or -1 to wait forever
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* @return EC_SUCCESS if ok, or
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* EC_ERROR_TIMEOUT if power button failed to release
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*/
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int power_button_wait_for_release(unsigned int timeout_us);
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/**
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* Return non-zero if power button signal asserted at hardware input.
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*
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*/
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int power_button_signal_asserted(void);
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/**
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* Interrupt handler for power button.
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*
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* @param signal Signal which triggered the interrupt.
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*/
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void power_button_interrupt(enum gpio_signal signal);
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/**
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* For x86 systems, force-assert the power button signal to the PCH.
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*/
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void power_button_pch_press(void);
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/**
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* For x86 systems, force-deassert the power button signal to the PCH.
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*/
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void power_button_pch_release(void);
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/**
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* For x86 systems, force a pulse of the power button signal to the PCH.
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*/
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void power_button_pch_pulse(void);
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#endif /* __CROS_EC_POWER_BUTTON_H */
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