81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
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/* Copyright 2019 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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* Battery pack vendor provided charging profile
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*/
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#include "battery.h"
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#include "battery_fuel_gauge.h"
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#include "battery_smart.h"
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#include "gpio.h"
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#include "system.h"
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static enum battery_present batt_pres_prev = BP_NOT_SURE;
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enum battery_present __attribute__((weak)) variant_battery_present(void)
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{
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return BP_NOT_SURE;
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}
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enum battery_present battery_hw_present(void)
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{
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enum battery_present bp = variant_battery_present();
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if (bp != BP_NOT_SURE)
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return bp;
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return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
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}
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static int battery_init(void)
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{
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int batt_status;
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return battery_status(&batt_status) ? 0 :
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!!(batt_status & STATUS_INITIALIZED);
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}
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/*
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* Physical detection of battery.
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*/
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static enum battery_present battery_check_present_status(void)
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{
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enum battery_present batt_pres;
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/* Get the physical hardware status */
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batt_pres = battery_hw_present();
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/*
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* If the battery is not physically connected, then no need to perform
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* any more checks.
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*/
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if (batt_pres != BP_YES)
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return batt_pres;
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/*
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* If the battery is present now and was present last time we checked,
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* return early.
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*/
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if (batt_pres == batt_pres_prev)
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return batt_pres;
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/*
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* Ensure that battery is:
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* 1. Not in cutoff
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* 2. Initialized
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*/
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if (battery_is_cut_off() != BATTERY_CUTOFF_STATE_NORMAL ||
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battery_init() == 0) {
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batt_pres = BP_NO;
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}
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return batt_pres;
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}
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enum battery_present battery_is_present(void)
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{
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batt_pres_prev = battery_check_present_status();
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return batt_pres_prev;
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}
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