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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Pure GPIO-based external power detection */
#include "common.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
int extpower_is_present(void)
{
return gpio_get_level(GPIO_AC_PRESENT);
}
/**
* Deferred function to handle external power change
*/
static void extpower_deferred(void)
{
hook_notify(HOOK_AC_CHANGE);
/* Forward notification to host */
if (extpower_is_present())
host_set_single_event(EC_HOST_EVENT_AC_CONNECTED);
else
host_set_single_event(EC_HOST_EVENT_AC_DISCONNECTED);
}
DECLARE_DEFERRED(extpower_deferred);
void extpower_interrupt(enum gpio_signal signal)
{
/* Trigger deferred notification of external power change */
hook_call_deferred(extpower_deferred, 0);
}
static void extpower_init(void)
{
/* Enable interrupts, now that we've initialized */
gpio_enable_interrupt(GPIO_AC_PRESENT);
}
DECLARE_HOOK(HOOK_INIT, extpower_init, HOOK_PRIO_DEFAULT);
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