58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Author: Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/acpi.h>
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#include <linux/platform_device.h>
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#include <asm/bootinfo.h>
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#include <asm/loongson.h>
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void enable_gpe_wakeup(void)
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{
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if (acpi_disabled)
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return;
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if (acpi_gbl_reduced_hardware)
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return;
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acpi_enable_all_wakeup_gpes();
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}
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void enable_pci_wakeup(void)
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{
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if (acpi_disabled)
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return;
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if (acpi_gbl_reduced_hardware)
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return;
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acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_STATUS, 1);
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if (acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE)
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acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_DISABLE, 0);
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}
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static int __init loongson3_acpi_suspend_init(void)
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{
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#ifdef CONFIG_ACPI
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acpi_status status;
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uint64_t suspend_addr = 0;
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if (acpi_disabled || acpi_gbl_reduced_hardware)
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return 0;
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acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
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status = acpi_evaluate_integer(NULL, "\\SADR", NULL, &suspend_addr);
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if (ACPI_FAILURE(status) || !suspend_addr) {
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pr_err("ACPI S3 is not support!\n");
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return -1;
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}
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loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr));
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#endif
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return 0;
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}
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device_initcall(loongson3_acpi_suspend_init);
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