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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* loongson-specific suspend support
*
* Copyright (C) 2009 Lemote Inc.
* Author: Wu Zhangjin <wuzhangjin@gmail.com>
*/
#include <linux/suspend.h>
#include <linux/pm.h>
#include <asm/mipsregs.h>
#include <loongson.h>
asmlinkage void loongson_lefi_sleep(unsigned long sleep_addr);
static int lefi_pm_enter(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_MEM:
pm_set_suspend_via_firmware();
loongson_lefi_sleep(loongson_sysconf.suspend_addr);
pm_set_resume_via_firmware();
return 0;
default:
return -EINVAL;
}
}
static int lefi_pm_valid_state(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_MEM:
return !!loongson_sysconf.suspend_addr;
default:
return 0;
}
}
static const struct platform_suspend_ops lefi_pm_ops = {
.valid = lefi_pm_valid_state,
.enter = lefi_pm_enter,
};
static int __init loongson_pm_init(void)
{
if (loongson_sysconf.fw_interface == LOONGSON_LEFI)
suspend_set_ops(&lefi_pm_ops);
return 0;
}
arch_initcall(loongson_pm_init);
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