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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-03-24 17:58:51 +0000
committerWill Deacon <will.deacon@arm.com>2015-03-26 15:13:09 +0000
commitd8f4f161e31f3ee9768467344e6cc31a0b9d9249 (patch)
tree428ed2902d784abc052f8160d1f6b3a21849b248 /drivers/acpi/Kconfig
parent33757ded074918eb49243968a82e7c9ec2d71720 (diff)
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 <jiang.liu@linux.intel.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/acpi/Kconfig')
-rw-r--r--drivers/acpi/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index a8f531e2b97c..ab2cbb51c6aa 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -48,6 +48,9 @@ config ACPI_LEGACY_TABLES_LOOKUP
config ARCH_MIGHT_HAVE_ACPI_PDC
bool
+config ACPI_GENERIC_GSI
+ bool
+
config ACPI_SYSTEM_POWER_STATES_SUPPORT
bool