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4681e6bc34
This ensures that modules with default priority (or later) get
an accurate response from extpower_is_present().
BUG=chrome-os-partner:27160
BRANCH=ToT
TEST=Add a default priority initializer. Verify it gets the correct
value for extpower_is_present() with and without external power
connected.
static void extpower_init_check(void)
{
CPRINTF("[%T Extpower %s]\n", extpower_is_present() ? "on" : "off");
}
DECLARE_HOOK(HOOK_INIT, extpower_init_check, HOOK_PRIO_DEFAULT);
Change-Id: Ic47c79d3ab4e7b2fdb6ad2354e4f455697cac250
Original-Change-Id: I13edc32b2a4609fad12982fd710fa95f9e81c9c2
Signed-off-by: Dave Parker <dparker@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/191296
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/192137
59 lines
1.4 KiB
C
59 lines
1.4 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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debounced_extpower_presence = gpio_get_level(GPIO_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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