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

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Message-ID: <52BBB614.5010707@ti.com>
Date:	Thu, 26 Dec 2013 10:22:36 +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 Wednesday 18 December 2013 02:49 PM, Sricharan R wrote:
> 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 ?
> 
  Ping..

Regards,
 Sricharan

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