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https://github.com/Telecominfraproject/OpenCellular.git
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552c17543f
Add initial support for Oak rev1 board. This is just the EC and includes battery charging but does not include USB PD. BUG=none BRANCH=none TEST=load on oak board and get console Signed-off-by: Rong Chang <rongchang@chromium.org> Signed-off-by: Alec Berg <alecaberg@chromium.org> Change-Id: I626f3921025fbc39ba22b04eeb6dd1084cd70777 Reviewed-on: https://chromium-review.googlesource.com/261678
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* Copyright 2015 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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/*
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* Pure GPIO-based external power detection, buffered to PCH.
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* Drive high in S5-S0 when AC_PRESENT is high, otherwise drive low.
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*/
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#include "chipset.h"
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#include "common.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "system.h"
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#include "util.h"
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int extpower_is_present(void)
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{
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return gpio_get_level(GPIO_AC_PRESENT);
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}
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static void extpower_buffer_to_soc(void)
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{
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/* Drive high when AP is off */
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gpio_set_level(GPIO_LEVEL_SHIFT_EN_L,
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chipset_in_state(CHIPSET_STATE_HARD_OFF) ? 1 : 0);
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}
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DECLARE_HOOK(HOOK_CHIPSET_PRE_INIT, extpower_buffer_to_soc, HOOK_PRIO_DEFAULT);
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static void extpower_shutdown(void)
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{
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/* Disable level shift to SoC when shutting down */
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gpio_set_level(GPIO_LEVEL_SHIFT_EN_L, 1);
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}
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DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, extpower_shutdown, HOOK_PRIO_DEFAULT);
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void extpower_interrupt(enum gpio_signal signal)
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{
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/* Trigger notification of external power change */
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extpower_buffer_to_soc();
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}
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static void extpower_init(void)
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{
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extpower_buffer_to_soc();
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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_DEFAULT);
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