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https://github.com/Telecominfraproject/OpenCellular.git
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6d49e2660e
The implementations are identical for daisy and snow, so move to a common file instead of having duplicate code in board.c BUG=chrome-os-partner:18343 BRANCH=none TEST=build daisy, snow Change-Id: I63597885607fd03b3bf87bcebf2146190b301f22 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/47183 Reviewed-by: Vic Yang <victoryang@chromium.org>
47 lines
1.2 KiB
C
47 lines
1.2 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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/* External power detection for daisy/snow/pit */
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#include "common.h"
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#include "extpower.h"
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#include "gpio.h"
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#include "pmu_tpschrome.h"
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#include "task.h"
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int extpower_is_present(void)
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{
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/*
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* Detect AC state using combined gpio pins
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*
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* On daisy and snow, there's no single gpio signal to detect AC.
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* GPIO_AC_PWRBTN_L provides AC on and PWRBTN release.
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* GPIO_KB_PWR_ON_L provides PWRBTN release.
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*
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* When AC plugged, both GPIOs will be high.
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*
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* One drawback of this detection is, when press-and-hold power
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* button. AC state will be unknown. This function will fallback
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* to PMU VACG.
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*/
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int ac_good = 1, battery_good;
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if (gpio_get_level(GPIO_KB_PWR_ON_L))
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return gpio_get_level(GPIO_AC_PWRBTN_L);
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/* Check PMU VACG */
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if (!in_interrupt_context())
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pmu_get_power_source(&ac_good, &battery_good);
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/*
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* Charging task only interacts with AP in discharging state. So
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* return 1 when AC status can not be detected by GPIO or VACG.
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*/
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return ac_good;
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}
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/* TODO: host events and hook notifications */
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