[PATCH] ARM: imx: support edge irq trigger for gpc

[l.stach@pengutronix.de (Lucas Stach)]

Am Dienstag, den 20.10.2015, 01:02 +0800 schrieb Anson Huang:
> GPC irq domain is a child domain of GIC, now all of
> platform irqs are inside GPC domain, during the module
> populate, all devices irq should have correct type
> setting in GIC, however, there is no .irq_set_type
> callback setting in GPC, so the irq_set_type will be
> skipped and cause edge raising type of irq work
> abnormally after kernel boot up.
> 
What are the symptoms of this "abnormal" working?

> Since GPC has no irq type, so just tell kernel to
> use irq_chip_set_type_parent instead.
> 
The change itself looks good, but the description needs some work. Also
please don't wrap the commit message too early, it makes it harder than
necessary to read.

> Signed-off-by: Anson Huang <b20788@freescale.com>

I think this needs a stable annotation.

> ---
>  arch/arm/mach-imx/gpc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
> index 10bf715..b3a7a74 100644
> --- a/arch/arm/mach-imx/gpc.c
> +++ b/arch/arm/mach-imx/gpc.c
> @@ -176,6 +176,7 @@ static struct irq_chip imx_gpc_chip = {
>  	.irq_unmask		= imx_gpc_irq_unmask,
>  	.irq_retrigger		= irq_chip_retrigger_hierarchy,
>  	.irq_set_wake		= imx_gpc_irq_set_wake,
> +	.irq_set_type           = irq_chip_set_type_parent,
>  #ifdef CONFIG_SMP
>  	.irq_set_affinity	= irq_chip_set_affinity_parent,
>  #endif

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