linux-kernel - Re: [PATCH V5 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP

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Date:	Wed, 18 Dec 2013 14:49:33 +0530
From:	Sricharan R <r.sricharan@...com>
To:	Sricharan R <r.sricharan@...com>
CC:	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <linus.walleij@...aro.org>,
	<linux@....linux.org.uk>, <tony@...mide.com>, <rnayak@...com>,
	<marc.zyngier@....com>, <grant.likely@...aro.org>,
	<mark.rutland@....com>, <robherring2@...il.com>,
	<tglx@...utronix.de>, <galak@...eaurora.org>,
	<rob.herring@...xeda.com>, <santosh.shilimkar@...com>, <nm@...com>,
	<bcousson@...libre.com>
Subject: Re: [PATCH V5 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP

Hi Thomas,

On Tuesday 03 December 2013 03:57 PM, Sricharan R wrote:
> Some socs have a large number of interrupts requests to service
> the needs of its many peripherals and subsystems. All of the interrupt
> requests lines from the subsystems are not needed at the same
> time, so they have to be muxed to the controllers appropriately.
> In such places a interrupt controllers are preceded by an
> IRQ CROSSBAR that provides flexibility in muxing the device interrupt
> requests to the controller inputs.
> 
> This series models the peripheral interrupts that can be routed through
> the crossbar to the GIC as 'routable-irqs'. The routable irqs are added
> in a separate linear domain inside the GIC. The registered routable domain's
> callback are invoked as a part of the GIC's callback, which in turn should
> allocate a free irq line and configure the IP accordingly. So every peripheral
> in the dts files mentions the fixed crossbar number as its interrupt. A free
> gic line for that gets allocated and configured when the peripheral interrupts
> are mapped.
> 
> The minimal crossbar driver to track and allocate free GIC lines and configure the
> crossbar is added here, along with the DT bindings.
> 
> V5:
>    Addressed a comment from Mark Rutland <mark.rutland@....com>,
>    updated tags and rebased on 3.13-rc2
> 
> V4:
>    Addressed a couple of comments and split the DTS file updates in to
>    a separate series.
> 
> V3:
>    Addressed few more comments from Thomas Gleixner <tglx@...utronix.de>
> 
>    Rebased patches 3,4,5,7 which updates the DTS file on top of below branch
> 	   git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt.git
> 	   for_3.13/dts
> 
>    Rebased patches 1,2,6 on top of 3.12 mainline
>    Updated Commit tags
> 
> V2:
>    Addressed Thomas Gleixner <tglx@...utronix.de> comments and
>    Kumar Gala <galak@...eaurora.org>
> 
>    Split updating the DRA7.dtsi file for adding the routable-irqs
> 
> Previous discussions that led to this is at
> 	https://lkml.org/lkml/2013/9/18/540
> 
> The V1,V2,V3,V4 post of these patches is at
>       [V1]  https://lkml.org/lkml/2013/9/30/283
>       [V2]  http://www.spinics.net/lists/linux-omap/msg99540.html
>       [V3]  http://www.kernelhub.org/?msg=356470&p=2
>       [V4]  http://www.spinics.net/lists/linux-doc/msg16726.html
> 
> Sricharan R (4):
>   DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs
>   DRIVERS: IRQCHIP: CROSSBAR: Add support for Crossbar IP
>   ARM: OMAP4+: Correct Wakeup-gen code to use physical irq number
>   ARM: DRA: Enable Crossbar IP support for DRA7XX
> 
>  Documentation/devicetree/bindings/arm/gic.txt      |    6 +
>  .../devicetree/bindings/arm/omap/crossbar.txt      |   27 +++
>  arch/arm/mach-omap2/Kconfig                        |    1 +
>  arch/arm/mach-omap2/omap-wakeupgen.c               |    4 +-
>  arch/arm/mach-omap2/omap4-common.c                 |    2 +
>  drivers/irqchip/Kconfig                            |    8 +
>  drivers/irqchip/Makefile                           |    1 +
>  drivers/irqchip/irq-crossbar.c                     |  208 ++++++++++++++++++++
>  drivers/irqchip/irq-gic.c                          |   81 +++++++-
>  include/linux/irqchip/arm-gic.h                    |    7 +-
>  include/linux/irqchip/irq-crossbar.h               |   11 ++
>  11 files changed, 343 insertions(+), 13 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/omap/crossbar.txt
>  create mode 100644 drivers/irqchip/irq-crossbar.c
>  create mode 100644 include/linux/irqchip/irq-crossbar.h
> 

I have addressed all the comments on this series, can this be merged now ?

Regards,
 Sricharan
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