linux-kernel - Re: [PATCH v2 5/6] ARM: OMAP: wakeupgen: fix arm gic irq type configuration

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Message-ID: <20150813095048.GA4215@atomide.com>
Date:	Thu, 13 Aug 2015 02:50:48 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Grygorii Strashko <grygorii.strashko@...com>
Cc:	tglx@...utronix.de, marc.zyngier@....com, linux@....linux.org.uk,
	nsekhar@...com, jason@...edaemon.net, balbi@...com,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/6] ARM: OMAP: wakeupgen: fix arm gic irq type
 configuration

* Grygorii Strashko <grygorii.strashko@...com> [150812 10:49]:
> It's observed that ARM GIC IRQ triggering type is not configured
> properly when IRQ is routed through IRQ domain hierarchy and
> system started using DT. As result, system will start using default
> ARM GIC configuration, ignore DT IRQ triggering configuration,
> and value of desc->irq_data.state_use_accessors = 0.
> 
> In case of TI OMAP DRA7 the following IRQ hierarchy is defined:
> ARM GIC <- OMAP wakeupgen <- TI CBAR
> 
> Failed call chain:
>      irq_create_of_mapping
>      irq_set_irq_type
>      __irq_set_trigger
>      if (!chip || !chip->irq_set_type) {
>         return 0; <- return here
>      }
> OMAP wakeupgen has no .irq_set_type() defined and, so, IRQ triggering
> configuration will not be propagated to parent IRQ domain.
> 
> Hence, fix it by using irq_chip_set_type_parent() for
> propagation IRQ triggering type to parent IRQ domains.
> 
> Fixes: 7136d457f365 ('ARM: omap: convert wakeupgen to stacked domains')
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>

Makse sense to merge this along with the irqchip changes once those
are ready, so feel free to add to this one:

Acked-by: Tony Lindgren <tony@...mide.com>

> ---
>  arch/arm/mach-omap2/omap-wakeupgen.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
> index 8e52621..e1d2e99 100644
> --- a/arch/arm/mach-omap2/omap-wakeupgen.c
> +++ b/arch/arm/mach-omap2/omap-wakeupgen.c
> @@ -392,6 +392,7 @@ static struct irq_chip wakeupgen_chip = {
>  	.irq_mask		= wakeupgen_mask,
>  	.irq_unmask		= wakeupgen_unmask,
>  	.irq_retrigger		= irq_chip_retrigger_hierarchy,
> +	.irq_set_type		= irq_chip_set_type_parent,
>  	.flags			= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
>  #ifdef CONFIG_SMP
>  	.irq_set_affinity	= irq_chip_set_affinity_parent,
> -- 
> 2.5.0
> 
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