[PATCH 2/5] ARM: omap: update GPIO chained IRQ handler to use EOI in parent chip

[Santosh Shilimkar]

> -----Original Message-----
> From: Will Deacon [mailto:will.deacon at arm.com]
> Sent: Monday, February 21, 2011 8:58 PM
> To: linux-arm-kernel at lists.infradead.org
> Cc: linux at arm.linux.org.uk; adharmap at codeaurora.org; rabin at rab.in;
> tglx at linutronix.de; catalin.marinas at arm.com;
> santosh.shilimkar at ti.com; ccross at google.com;
> kyungmin.park at samsung.com; Will Deacon
> Subject: [PATCH 2/5] ARM: omap: update GPIO chained IRQ handler to
> use EOI in parent chip
>
> On OMAP4, gpio_irq_handler can be chained to a physical interrupt
> using
> the GIC as the primary IRQ chip. Now that the GIC uses the fasteoi
> flow
> model, the chained handler must invoke ->irq_eoi once handling is
> complete.
>
> This patch adds a conditional call to ->irq_eoi in the GPIO IRQ
> handler
> for OMAP platforms. For OMAP implementations using other primary
> interrupt controllers, the ->irq_ack call remains and is also made
> conditional on the support offered by the controller.
>
> Cc: Santosh Shilimkar <santosh.shilimkar at ti.com>
> Cc: Colin Cross <ccross at google.com>
> Signed-off-by: Will Deacon <will.deacon at arm.com>
> ---
Thanks Will for changes. They look fine.
Acked-by: Santosh Shilimkar <santosh.shilimkar at ti.com>

I will test your series tomorrow on OMAP with some
GPIO interrupts.


>  arch/arm/plat-omap/gpio.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
> index 971d186..1d2d1c7 100644
> --- a/arch/arm/plat-omap/gpio.c
> +++ b/arch/arm/plat-omap/gpio.c
> @@ -1144,7 +1144,8 @@ static void gpio_irq_handler(unsigned int irq,
> struct irq_desc *desc)
>  	u32 retrigger = 0;
>  	int unmasked = 0;
>
> -	desc->irq_data.chip->irq_ack(&desc->irq_data);
> +	if (desc->irq_data.chip->irq_ack)
> +		desc->irq_data.chip->irq_ack(&desc->irq_data);
>
>  	bank = get_irq_data(irq);
>  #ifdef CONFIG_ARCH_OMAP1
> @@ -1238,6 +1239,8 @@ static void gpio_irq_handler(unsigned int irq,
> struct irq_desc *desc)
>  exit:
>  	if (!unmasked)
>  		desc->irq_data.chip->irq_unmask(&desc->irq_data);
> +	if (desc->irq_data.chip->irq_eoi)
> +		desc->irq_data.chip->irq_eoi(&desc->irq_data);
>  }
>
>  static void gpio_irq_shutdown(struct irq_data *d)
> --
> 1.7.0.4
>