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// 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 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);
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