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

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Message-ID: <52BD856E.7010609@ti.com>
Date:	Fri, 27 Dec 2013 19:19:34 +0530
From:	Sricharan R <r.sricharan@...com>
To:	Santosh Shilimkar <santosh.shilimkar@...com>
CC:	<tony@...mide.com>, <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>, <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>, <nm@...com>,
	<bcousson@...libre.com>
Subject: Re: [PATCH V5 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP

On Thursday 26 December 2013 11:14 PM, Santosh Shilimkar wrote:
> Sricharan,
> 
> On Wednesday 25 December 2013 11:52 PM, Sricharan R wrote:
>> 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..
>>
> Thomas has already given his reviewed-by tag so the patches can be
> taken via arm-soc tree considering OMAP and GIC changes. Can you
> create a branch with all these patches applied and send it
> to Tony ?
> 
Ok, i will send out a branch for this.

Regards,
 Sricharan
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