// 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 struct platform_device loongson3_cpufreq_device = { .name = "loongson3_cpufreq", .id = -1, }; static int __init loongson_cpufreq_init(void) { if (!cpu_has_scalefreq) return -ENODEV; return platform_device_register(&loongson3_cpufreq_device); } arch_initcall(loongson_cpufreq_init); static void default_suspend_addr(void) { acpi_enter_sleep_state(ACPI_STATE_S3); } static int __init loongson3_acpi_suspend_init(void) { #ifdef CONFIG_ACPI acpi_status status; uint64_t suspend_addr = 0; if (acpi_disabled) return 0; if (!acpi_gbl_reduced_hardware) acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); if (!acpi_sleep_state_supported(ACPI_STATE_S3)) return 0; status = acpi_evaluate_integer(NULL, "\\SADR", NULL, &suspend_addr); if (ACPI_FAILURE(status) || !suspend_addr) { pr_info("ACPI S3 supported with hardware register default\n"); loongson_sysconf.suspend_addr = (u64)default_suspend_addr; } else { pr_info("ACPI S3 supported with Loongson ACPI SADR extension\n"); loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr)); } #endif return 0; } device_initcall(loongson3_acpi_suspend_init);