diff options
Diffstat (limited to 'arch/loongarch/power/platform.c')
| -rw-r--r-- | arch/loongarch/power/platform.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/loongarch/power/platform.c b/arch/loongarch/power/platform.c index 3ea8e07aa225..4b5d82643c23 100644 --- a/arch/loongarch/power/platform.c +++ b/arch/loongarch/power/platform.c @@ -34,22 +34,34 @@ void enable_pci_wakeup(void) 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 || acpi_gbl_reduced_hardware) + 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; - 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; + 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)); } - loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr)); #endif return 0; } |