linux-kernel - Re: [PATCH V4 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP

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Date:	Thu, 14 Nov 2013 09:25:37 -0500
From:	Santosh Shilimkar <santosh.shilimkar@...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>, <nm@...com>, <bcousson@...libre.com>
Subject: Re: [PATCH V4 0/4] DRIVERS: IRQCHIP: Add support for crossbar IP

On Thursday 14 November 2013 07:18 AM, 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.
> 
> V4:
>    Addressed a couple of comments and split the DTS file updates in to
>    a separate series.
> 
Thanks for the split.
For entire series,
Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>

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