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6136b1fb09
The debounce timer might be too slow to actually update the state of debounced_power_pressed by the time we do power_button_is_pressed in the S3->S5 state transition. Solution is to move the power_button_wait_for_release function here and make sure there are no deferreds active. BUG=chrome-os-partner:35948 TEST=During dev mode screen, press power button, note the device stays off TEST=Print debounced_power_pressed in power_button_is_pressed(void), note it's not 0 when power button is actually pressed BRANCH=veyron Change-Id: I8258e9e5524bd65d6ea9c77ea5649304d2195bf0 Signed-off-by: Alexandru M Stan <amstan@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/244590 Reviewed-by: Randall Spangler <rspangler@chromium.org>
53 lines
1.3 KiB
C
53 lines
1.3 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-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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