From d8f4f161e31f3ee9768467344e6cc31a0b9d9249 Mon Sep 17 00:00:00 2001 From: Lorenzo Pieralisi Date: Tue, 24 Mar 2015 17:58:51 +0000 Subject: ACPI: move arm64 GSI IRQ model to generic GSI IRQ layer The code deployed to implement GSI linux IRQ numbers mapping on arm64 turns out to be generic enough so that it can be moved to ACPI core code along with its respective config option ACPI_GENERIC_GSI selectable on architectures that can reuse the same code. Current ACPI IRQ mapping code is not integrated in the kernel IRQ domain infrastructure, in particular there is no way to look-up the IRQ domain associated with a particular interrupt controller, so this first version of GSI generic code carries out the GSI<->IRQ mapping relying on the IRQ default domain which is supposed to be always set on a specific architecture in case the domain structure passed to irq_create/find_mapping() functions is missing. This patch moves the arm64 acpi functions that implement the gsi mappings: acpi_gsi_to_irq() acpi_register_gsi() acpi_unregister_gsi() to ACPI core code. Since the generic GSI<->domain mapping is based on IRQ domains, it can be extended as soon as a way to map an interrupt controller to an IRQ domain is implemented for ACPI in the IRQ domain layer. x86 and ia64 code for GSI mappings cannot rely on the generic GSI layer at present for legacy reasons, so they do not select the ACPI_GENERIC_GSI config options and keep relying on their arch specific GSI mapping layer. Cc: Jiang Liu Cc: Catalin Marinas Cc: Rafael J. Wysocki Acked-by: Hanjun Guo Acked-by: Will Deacon Acked-by: Marc Zyngier Signed-off-by: Lorenzo Pieralisi Signed-off-by: Will Deacon --- drivers/acpi/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/acpi/Makefile') diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index db153c6a75d7..8a063e276530 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -56,6 +56,7 @@ ifdef CONFIG_ACPI_VIDEO acpi-y += video_detect.o endif acpi-y += acpi_lpat.o +acpi-$(CONFIG_ACPI_GENERIC_GSI) += gsi.o # These are (potentially) separate modules -- cgit v1.2.3