01 Oct, 2015
2 commits
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Now that we have a basic infrastructure to register irqchips and
call them on discovery of a matching entry in MADT, convert the
GIC driver to this new probing method.It ends up being a code deletion party, which is a rather good thing.
Signed-off-by: Marc Zyngier
Acked-by: Catalin Marinas
Reviewed-by: Hanjun Guo
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki -
DT enjoys a rather nice probing infrastructure for irqchips, while
ACPI is so far stuck into a very distant past.This patch introduces a declarative API, allowing irqchips to be
self-contained and be called when a particular entry is matched
in the MADT table.Signed-off-by: Marc Zyngier
Acked-by: Catalin Marinas
Reviewed-by: Hanjun Guo
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki
26 Mar, 2015
1 commit
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ACPI kernel uses MADT table for proper GIC initialization. It needs to
parse GIC related subtables, collect CPU interface and distributor
addresses and call driver initialization function (which is hardware
abstraction agnostic). In a similar way, FDT initialize GICv1/2.NOTE: This commit allow to initialize GICv1/2 basic functionality.
While now simple GICv2 init call is used, any further GIC features
require generic infrastructure for proper ACPI irqchip initialization.
That mechanism and stacked irqdomains to support GICv2 MSI/virtualization
extension, GICv3/4 and its ITS are considered as next steps.CC: Jason Cooper
CC: Marc Zyngier
CC: Thomas Gleixner
Tested-by: Suravee Suthikulpanit
Tested-by: Yijing Wang
Tested-by: Mark Langsdorf
Tested-by: Jon Masters
Tested-by: Timur Tabi
Tested-by: Robert Richter
Acked-by: Robert Richter
Acked-by: Marc Zyngier
Acked-by: Jason Cooper
Reviewed-by: Grant Likely
Signed-off-by: Tomasz Nowicki
Signed-off-by: Hanjun Guo
Signed-off-by: Will Deacon
21 May, 2014
1 commit
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Make the irqchip OF match table section naming aligned with other
OF match table sections in preparation to have a common definition.Acked-by: Arnd Bergmann
Signed-off-by: Rob Herring
12 Mar, 2014
1 commit
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The "irqchip.h" include here is not needed as the only thing in
irqchip.h is IRQCHIP_DECLARE which this file doesn't use. Drop
it.Reported-by: Jiri Kosina
Signed-off-by: Stephen Boyd
Link: http://lkml.kernel.org/r/531F7765.40207@codeaurora.org
Signed-off-by: Thomas Gleixner
06 Mar, 2014
1 commit
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drivers/irqchip/irqchip.c:27:13: warning: symbol 'irqchip_init'
was not declared. Should it be static?Signed-off-by: Stephen Boyd
Cc: trivial@kernel.org
Link: http://lkml.kernel.org/r/1393981281-25553-1-git-send-email-sboyd@codeaurora.org
Signed-off-by: Thomas Gleixner
11 Jan, 2013
1 commit
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With the recent creation of the drivers/irqchip/ directory, it is
desirable to move irq controller drivers here. At the moment, the only
driver here is irq-bcm2835, the driver for the irq controller found in
the ARM BCM2835 SoC, present in Rasberry Pi systems. This irq
controller driver was exporting its initialization function and its
irq handling function through a header file in
.When proposing to also move another irq controller driver in
drivers/irqchip, Rob Herring raised the very valid point that moving
things to drivers/irqchip was good in order to remove more stuff from
arch/arm, but if it means adding gazillions of headers files in
include/linux/irqchip/, it would not be very nice.So, upon the suggestion of Rob Herring and Arnd Bergmann, this commit
introduces a small infrastructure that defines a central
irqchip_init() function in drivers/irqchip/irqchip.c, which is meant
to be called as the ->init_irq() callback of ARM platforms. This
function calls of_irq_init() with an array of match strings and init
functions generated from a special linker section.Note that the irq controller driver initialization function is
responsible for setting the global handle_arch_irq() variable, so that
ARM platforms no longer have to define the ->handle_irq field in their
DT_MACHINE structure.A global header, is also added to expose the single
irqchip_init() function to the reset of the kernel.A further commit moves the BCM2835 irq controller driver to this new
small infrastructure, therefore removing the include/linux/irqchip/
directory.Signed-off-by: Thomas Petazzoni
Reviewed-by: Stephen Warren
Reviewed-by: Rob Herring
Acked-by: Arnd Bergmann
[rob.herring: reword commit message to reflect use of linker sections.]
Signed-off-by: Rob Herring
