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627f3a8ac2
This patch adds wait between DSW_PWROK and PWRBTN assert. It is required to be 95 msec or longer for Kaby Lake and Sky Lake. Refer to the timing diagram for G3 to S0 on Sky Lake or Kaby Lake platform design guide for details. BUG=b:62584658 BRANCH=none TEST=On Fizz, measured time between DSW_PWROK high and PWRBTN assert for 1:AC plug-in, 2:recovery+power press, 3: reboot ec command. Change-Id: I89a14ac9a49e20a332bd662d90be62f8ea23b003 Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/534901
66 lines
1.6 KiB
C
66 lines
1.6 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(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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/**
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* Returns the time when DSW_PWROK was asserted. It should be customized
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* by each board. See CONFIG_DELAY_DSW_PWROK_TO_PWRBTN for details.
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*
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* @return time in usec when DSW_PWROK was asserted.
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*/
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int64_t get_time_dsw_pwrok(void);
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#endif /* __CROS_EC_POWER_BUTTON_H */
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