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