[PATCH 0/5] Making the generic ACPI GSI layer irqdomain aware

[Graeme Gregory]

On Tue, Jul 21, 2015 at 11:07:55AM +0100, Marc Zyngier wrote:
> The irqdomain code is not entierely really ACPI friendly, as it has
> some built-in knowledge of the device-tree. Nothing too harmful, but
> enough to scare the ARM ACPI developpers which end up with their own
> version of the square wheel.
> 
> This small patch series adapt the irqdomain code to remove the hurdles
> that prevent the full blown irqdomain subsystem to be used on ACPI,
> creates an interface between the GSI layer and the irqdomain, and as
> an example, convert the ARM GIC ACPI support to use irqdomains as
> originally intended.
> 
> Overall, this gives us a way to use irqdomains on both DT and ACPI
> enabled platforms, having very little changes made to the actual
> drivers (other than the probing infrastructure). Because we keep the
> flow of information between the various layers identical between ACPI
> and DT, we immediately benefit from the existing infrastructure.
> 
> I'd really like to hear what people think of that approach, as it
> looks to me a lot simpler than the other approaches currently put on
> the list. The "convert the GSI information to be DT friendly" is
> admitedly not very pretty, but I see it as a stepping stone towards
> unifying the two structures.
> 
> This has been test-booted on Juno, and is based on my irq/ncpi-msi-2
> branch.
> 

I have tested this series on Seattle and it looks excellent to me.

Graeme


> Marc Zyngier (5):
>   genirq: irqdomain: Use an accessor for the of_node field
>   genirq: irqdomain: Remove irqdomain dependency on struct device_node
>   genirq: irqdomain: Add irq_create_acpi_mappings
>   acpi: gsi: Use acpi_gsi_descriptor to allocate interrupts
>   irqchip: GIC: Switch ACPI support to stacked domains
> 
>  arch/mips/cavium-octeon/octeon-irq.c          |  4 +-
>  arch/powerpc/platforms/cell/axon_msi.c        |  2 +-
>  arch/powerpc/platforms/cell/spider-pic.c      |  9 ++-
>  arch/powerpc/platforms/powernv/opal-irqchip.c |  2 +-
>  arch/powerpc/sysdev/ehv_pic.c                 |  3 +-
>  arch/powerpc/sysdev/fsl_msi.c                 |  2 +-
>  arch/powerpc/sysdev/i8259.c                   |  3 +-
>  arch/powerpc/sysdev/ipic.c                    |  3 +-
>  arch/powerpc/sysdev/mpic.c                    |  3 +-
>  arch/powerpc/sysdev/mpic_msi.c                |  2 +-
>  arch/powerpc/sysdev/qe_lib/qe_ic.c            |  3 +-
>  drivers/acpi/gsi.c                            | 54 ++++++++++-----
>  drivers/gpio/gpio-sodaville.c                 |  2 +-
>  drivers/irqchip/exynos-combiner.c             |  2 +-
>  drivers/irqchip/irq-atmel-aic-common.c        |  2 +-
>  drivers/irqchip/irq-crossbar.c                |  4 +-
>  drivers/irqchip/irq-gic-v2m.c                 |  2 +-
>  drivers/irqchip/irq-gic-v3-its.c              |  2 +-
>  drivers/irqchip/irq-gic-v3.c                  |  2 +-
>  drivers/irqchip/irq-gic.c                     | 17 ++---
>  drivers/irqchip/irq-hip04.c                   |  2 +-
>  drivers/irqchip/irq-mtk-sysirq.c              |  2 +-
>  drivers/irqchip/irq-s3c24xx.c                 |  4 +-
>  drivers/irqchip/irq-tegra.c                   |  4 +-
>  drivers/irqchip/irq-vf610-mscm-ir.c           |  5 +-
>  drivers/spmi/spmi-pmic-arb.c                  |  2 +-
>  include/linux/acpi.h                          |  9 +++
>  include/linux/irqchip/arm-gic.h               |  2 +-
>  include/linux/irqdomain.h                     | 67 +++++++++++--------
>  kernel/irq/irqdomain.c                        | 95 +++++++++++++++++++++------
>  30 files changed, 206 insertions(+), 109 deletions(-)
> 
> -- 
> 2.1.4
> 
> 
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