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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-27 20:48:53 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-10-28 18:28:22 +0300 |
| commit | 5c62d5aab8752e5ee7bfbe75ed6060db1c787f98 (patch) | |
| tree | 9996378e6e770d91951e4ed00bd607ee53bb0c6c /drivers/acpi/acpica/evevent.c | |
| parent | 60f2096b59bcd6827aa53d771505f939317b254c (diff) | |
| download | linux-5c62d5aab8752e5ee7bfbe75ed6060db1c787f98.tar.xz | |
ACPICA: Events: Support fixed PCIe wake event
ACPICA commit 32d875705c8ee8f99fd8b78dbed48633486a7640
Some chipsets (such as Loongson's LS7A) support fixed pcie wake event
which is defined in the PM1 block(related description can be found in
4.8.4.1.1 PM1 Status Registers, 4.8.4.2.1 PM1 Control Registers and
5.2.9 Fixed ACPI Description Table (FADT)), so we add code to handle it.
Link: https://uefi.org/specifications/ACPI/6.4/
Link: https://github.com/acpica/acpica/commit/32d87570
Co-developed-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/evevent.c')
| -rw-r--r-- | drivers/acpi/acpica/evevent.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c index df596d46dd97..82d1728b9bc6 100644 --- a/drivers/acpi/acpica/evevent.c +++ b/drivers/acpi/acpica/evevent.c @@ -142,6 +142,9 @@ static acpi_status acpi_ev_fixed_event_initialize(void) status = acpi_write_bit_register(acpi_gbl_fixed_event_info [i].enable_register_id, + (i == + ACPI_EVENT_PCIE_WAKE) ? + ACPI_ENABLE_EVENT : ACPI_DISABLE_EVENT); if (ACPI_FAILURE(status)) { return (status); @@ -185,6 +188,11 @@ u32 acpi_ev_fixed_event_detect(void) return (int_status); } + if (fixed_enable & ACPI_BITMASK_PCIEXP_WAKE_DISABLE) + fixed_enable &= ~ACPI_BITMASK_PCIEXP_WAKE_DISABLE; + else + fixed_enable |= ACPI_BITMASK_PCIEXP_WAKE_DISABLE; + ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, "Fixed Event Block: Enable %08X Status %08X\n", fixed_enable, fixed_status)); @@ -250,6 +258,9 @@ static u32 acpi_ev_fixed_event_dispatch(u32 event) if (!acpi_gbl_fixed_event_handlers[event].handler) { (void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. enable_register_id, + (event == + ACPI_EVENT_PCIE_WAKE) ? + ACPI_ENABLE_EVENT : ACPI_DISABLE_EVENT); ACPI_ERROR((AE_INFO, |