pm.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2011 Calxeda, Inc.
 4 */
 5
 6#include <linux/cpu_pm.h>
 7#include <linux/init.h>
 8#include <linux/psci.h>
 9#include <linux/suspend.h>
10
11#include <asm/suspend.h>
12
13#include <uapi/linux/psci.h>
14
15#include "core.h"
16
17#define HIGHBANK_SUSPEND_PARAM \
18	((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
19	 (1 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
20	 (PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
21
22static int highbank_suspend_finish(unsigned long val)
23{
24	return psci_ops.cpu_suspend(HIGHBANK_SUSPEND_PARAM, __pa(cpu_resume));
25}
26
27static int highbank_pm_enter(suspend_state_t state)
28{
29	cpu_pm_enter();
30	cpu_cluster_pm_enter();
31
32	cpu_suspend(0, highbank_suspend_finish);
33
34	cpu_cluster_pm_exit();
35	cpu_pm_exit();
36
37	return 0;
38}
39
40static const struct platform_suspend_ops highbank_pm_ops = {
41	.enter = highbank_pm_enter,
42	.valid = suspend_valid_only_mem,
43};
44
45void __init highbank_pm_init(void)
46{
47	if (!psci_ops.cpu_suspend)
48		return;
49
50	suspend_set_ops(&highbank_pm_ops);
51}