1*366bb35aSHuacai Chen // SPDX-License-Identifier: GPL-2.0 2*366bb35aSHuacai Chen /* 3*366bb35aSHuacai Chen * Author: Huacai Chen <chenhuacai@loongson.cn> 4*366bb35aSHuacai Chen * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 5*366bb35aSHuacai Chen */ 6*366bb35aSHuacai Chen #include <linux/acpi.h> 7*366bb35aSHuacai Chen #include <linux/platform_device.h> 8*366bb35aSHuacai Chen 9*366bb35aSHuacai Chen #include <asm/bootinfo.h> 10*366bb35aSHuacai Chen #include <asm/loongson.h> 11*366bb35aSHuacai Chen enable_gpe_wakeup(void)12*366bb35aSHuacai Chenvoid enable_gpe_wakeup(void) 13*366bb35aSHuacai Chen { 14*366bb35aSHuacai Chen if (acpi_disabled) 15*366bb35aSHuacai Chen return; 16*366bb35aSHuacai Chen 17*366bb35aSHuacai Chen if (acpi_gbl_reduced_hardware) 18*366bb35aSHuacai Chen return; 19*366bb35aSHuacai Chen 20*366bb35aSHuacai Chen acpi_enable_all_wakeup_gpes(); 21*366bb35aSHuacai Chen } 22*366bb35aSHuacai Chen enable_pci_wakeup(void)23*366bb35aSHuacai Chenvoid enable_pci_wakeup(void) 24*366bb35aSHuacai Chen { 25*366bb35aSHuacai Chen if (acpi_disabled) 26*366bb35aSHuacai Chen return; 27*366bb35aSHuacai Chen 28*366bb35aSHuacai Chen if (acpi_gbl_reduced_hardware) 29*366bb35aSHuacai Chen return; 30*366bb35aSHuacai Chen 31*366bb35aSHuacai Chen acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_STATUS, 1); 32*366bb35aSHuacai Chen 33*366bb35aSHuacai Chen if (acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE) 34*366bb35aSHuacai Chen acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_DISABLE, 0); 35*366bb35aSHuacai Chen } 36*366bb35aSHuacai Chen loongson3_acpi_suspend_init(void)37*366bb35aSHuacai Chenstatic int __init loongson3_acpi_suspend_init(void) 38*366bb35aSHuacai Chen { 39*366bb35aSHuacai Chen #ifdef CONFIG_ACPI 40*366bb35aSHuacai Chen acpi_status status; 41*366bb35aSHuacai Chen uint64_t suspend_addr = 0; 42*366bb35aSHuacai Chen 43*366bb35aSHuacai Chen if (acpi_disabled || acpi_gbl_reduced_hardware) 44*366bb35aSHuacai Chen return 0; 45*366bb35aSHuacai Chen 46*366bb35aSHuacai Chen acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); 47*366bb35aSHuacai Chen status = acpi_evaluate_integer(NULL, "\\SADR", NULL, &suspend_addr); 48*366bb35aSHuacai Chen if (ACPI_FAILURE(status) || !suspend_addr) { 49*366bb35aSHuacai Chen pr_err("ACPI S3 is not support!\n"); 50*366bb35aSHuacai Chen return -1; 51*366bb35aSHuacai Chen } 52*366bb35aSHuacai Chen loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr)); 53*366bb35aSHuacai Chen #endif 54*366bb35aSHuacai Chen return 0; 55*366bb35aSHuacai Chen } 56*366bb35aSHuacai Chen 57*366bb35aSHuacai Chen device_initcall(loongson3_acpi_suspend_init); 58