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/* Copyright 2014 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.
*/
/* Inductive charging control */
#include "common.h"
#include "gpio.h"
#include "hooks.h"
#include "lid_switch.h"
#include "timer.h"
void inductive_charging_interrupt(enum gpio_signal signal)
{
int charger_enabled = gpio_get_level(GPIO_BASE_CHG_VDD_EN);
int charge_done = gpio_get_level(GPIO_CHARGE_DONE);
/* Always try to charge if the lid is just closed */
if (signal == GPIO_LID_OPEN)
charge_done = 0;
if (!charger_enabled || charge_done)
gpio_set_level(GPIO_CHARGE_EN, 0);
else
gpio_set_level(GPIO_CHARGE_EN, 1);
}
static void inductive_charging_deferred_update(void)
{
int lid_open = lid_is_open();
gpio_set_level(GPIO_BASE_CHG_VDD_EN, !lid_open);
inductive_charging_interrupt(GPIO_LID_OPEN);
}
DECLARE_DEFERRED(inductive_charging_deferred_update);
static void inductive_charging_lid_update(void)
{
/*
* When the lid close signal changes, the coils might still be
* unaligned. Delay here to give the coils time to align before
* we try to clear CHARGE_DONE.
*/
hook_call_deferred(inductive_charging_deferred_update, 5 * SECOND);
}
DECLARE_HOOK(HOOK_LID_CHANGE, inductive_charging_lid_update, HOOK_PRIO_DEFAULT);
static void inductive_charging_init(void)
{
gpio_enable_interrupt(GPIO_CHARGE_DONE);
inductive_charging_lid_update();
}
DECLARE_HOOK(HOOK_INIT, inductive_charging_init, HOOK_PRIO_DEFAULT);
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