Commit c39660b2 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki

ACPICA: Update for ACPI 5 hardware-reduced feature

Ensure that AcpiEnable and AcpiDisable work properly when the
hardware-reduced flag is set in the FADT.
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent f1778eb1
......@@ -74,6 +74,12 @@ acpi_status acpi_enable(void)
return_ACPI_STATUS(AE_NO_ACPI_TABLES);
}
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (acpi_gbl_reduced_hardware) {
return_ACPI_STATUS(AE_OK);
}
/* Check current mode */
if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
......@@ -126,6 +132,12 @@ acpi_status acpi_disable(void)
ACPI_FUNCTION_TRACE(acpi_disable);
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (acpi_gbl_reduced_hardware) {
return_ACPI_STATUS(AE_OK);
}
if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
"System is already in legacy (non-ACPI) mode\n"));
......
......@@ -66,6 +66,12 @@ acpi_status acpi_hw_set_mode(u32 mode)
ACPI_FUNCTION_TRACE(hw_set_mode);
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (acpi_gbl_reduced_hardware) {
return_ACPI_STATUS(AE_OK);
}
/*
* ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
* system does not support mode transition.
......@@ -146,6 +152,12 @@ u32 acpi_hw_get_mode(void)
ACPI_FUNCTION_TRACE(hw_get_mode);
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (acpi_gbl_reduced_hardware) {
return_VALUE(ACPI_SYS_MODE_ACPI);
}
/*
* ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
* system does not support mode transition.
......
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