[PATCH v3 3/7] irqchip: atmel-aic: add new atmel AIC driver

[Jason Cooper]

On Thu, Jun 26, 2014 at 10:20:24PM +0200, Boris BREZILLON wrote:
> 
> On 20/06/2014 17:01, Boris BREZILLON wrote:
> > Add new atmel AIC (Advanced Interrupt Controller) driver based on the
> > generic chip infrastructure.
> >
> > This driver is only compatible with dt enabled board and replaces the old
> > implementation found in arch/arm/mach-at91/irq.c.
> >
> > Signed-off-by: Boris BREZILLON <boris.brezillon at free-electrons.com>
> > ---
> >  drivers/irqchip/Kconfig         |   7 +
> >  drivers/irqchip/Makefile        |   1 +
> >  drivers/irqchip/irq-atmel-aic.c | 700 ++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 708 insertions(+)
> >  create mode 100644 drivers/irqchip/irq-atmel-aic.c
> >
> > diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
> > index bbb746e..6a7ad81 100644
> > --- a/drivers/irqchip/Kconfig
> > +++ b/drivers/irqchip/Kconfig
> > @@ -30,6 +30,13 @@ config ARM_VIC_NR
> >  	  The maximum number of VICs available in the system, for
> >  	  power management.
> >  
> > +config ATMEL_AIC_IRQ
> > +	bool
> > +	select GENERIC_IRQ_CHIP
> > +	select IRQ_DOMAIN
> > +	select MULTI_IRQ_HANDLER
> > +	select SPARSE_IRQ
> > +
> 
> I just though a bit about it and it might be better to split AIC and
> AIC5 support in 2 different drivers, because the AIC is only available
> on at91sam9/at91rm9200 SoCs and AIC5 only available on sama5 SoCs, and
> AFAICT there is no combination of both controller in a singler SoC.
> 
> Jason, Thomas, let me know if you think this worth the trouble, and if
> so, should I keep a common implementation (in irq-atmel-aic-common.c/.h)
> for the shared functions/structures.

It sounds sensible, and we have a similar situation brewing with the gic
family.  I'd like to hear from the at91 maintainers, though.

thx,

Jason.