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