56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
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/* Copyright 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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/*
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* Dummy power module for Sensor HUB.
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*
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* This implements the following features:
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* when AP_IN_SUSPEND is low, in S0, otherwise S3.
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*
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*/
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#include "chipset.h" /* This module implements chipset functions too */
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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "power.h"
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#include "task.h"
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#include "util.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_CHIPSET, outstr)
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#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args)
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#define IN_SUSPEND POWER_SIGNAL_MASK(ECDRIVEN_SUSPEND_ASSERTED)
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enum power_state power_chipset_init(void)
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{
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return POWER_S3;
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}
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enum power_state power_handle_state(enum power_state state)
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{
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switch (state) {
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case POWER_S3:
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if (!(power_get_signals() & IN_SUSPEND)) {
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hook_notify(HOOK_CHIPSET_RESUME);
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return POWER_S0;
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}
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return state;
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case POWER_S0:
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if (power_get_signals() & IN_SUSPEND) {
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hook_notify(HOOK_CHIPSET_SUSPEND);
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return POWER_S3;
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}
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return state;
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default:
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CPRINTS("Unexpected state: $d", state);
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}
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return state;
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}
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