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e71ce1be8f
The memory-mapped AC_PRESENT flag needs to be initialized for the batteryless projects. BUG=chrome-os-partner:40384 TEST=make -j buildall, make -j tests BRANCH=None Signed-off-by: Ted Kuo <tedkuo@ami.com.tw> Change-Id: Ia64ad6564f99b4aae060d29a572b4fe173da62d9 Reviewed-on: https://chromium-review.googlesource.com/273082 Tested-by: Ted Kuo <tedkuo@ami.com.tw> Reviewed-by: Mohammed Habibulla <moch@google.com> Commit-Queue: Ted Kuo <tedkuo@ami.com.tw> (cherry picked from commit 6cc0ece36d4190e2461f7e44767e0f77f47401b8) Reviewed-on: https://chromium-review.googlesource.com/273462 Reviewed-by: Randall Spangler <rspangler@chromium.org>
67 lines
1.7 KiB
C
67 lines
1.7 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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/* Pure GPIO-based external power detection */
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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 "hooks.h"
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#include "host_command.h"
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#include "timer.h"
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#define EXTPOWER_DEBOUNCE_US (30 * MSEC)
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static int debounced_extpower_presence;
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int extpower_is_present(void)
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{
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return debounced_extpower_presence;
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}
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/**
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* Deferred function to handle external power change
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*/
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static void extpower_deferred(void)
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{
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int extpower_presence = gpio_get_level(GPIO_AC_PRESENT);
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if (extpower_presence == debounced_extpower_presence)
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return;
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debounced_extpower_presence = extpower_presence;
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hook_notify(HOOK_AC_CHANGE);
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/* Forward notification to host */
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if (extpower_presence)
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host_set_single_event(EC_HOST_EVENT_AC_CONNECTED);
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else
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host_set_single_event(EC_HOST_EVENT_AC_DISCONNECTED);
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}
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DECLARE_DEFERRED(extpower_deferred);
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void extpower_interrupt(enum gpio_signal signal)
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{
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/* Trigger deferred notification of external power change */
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hook_call_deferred(extpower_deferred, EXTPOWER_DEBOUNCE_US);
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}
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static void extpower_init(void)
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{
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uint8_t *memmap_batt_flags = host_get_memmap(EC_MEMMAP_BATT_FLAG);
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debounced_extpower_presence = gpio_get_level(GPIO_AC_PRESENT);
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/* Initialize the memory-mapped AC_PRESENT flag */
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if (debounced_extpower_presence)
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*memmap_batt_flags |= EC_BATT_FLAG_AC_PRESENT;
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else
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*memmap_batt_flags &= ~EC_BATT_FLAG_AC_PRESENT;
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/* Enable interrupts, now that we've initialized */
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gpio_enable_interrupt(GPIO_AC_PRESENT);
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}
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DECLARE_HOOK(HOOK_INIT, extpower_init, HOOK_PRIO_INIT_EXTPOWER);
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