linux-kernel - Re: [PATCH 3/3] ARM: gic: add OF based initialization

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Date:	Mon, 26 Sep 2011 23:29:18 +0100
From:	Jamie Iles <jamie@...ieiles.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	grant.likely@...retlab.ca, marc.zyngier@....com,
	thomas.abraham@...aro.org, jamie@...ieiles.com, b-cousson@...com,
	shawn.guo@...aro.org, dave.martin@...aro.org,
	linux@....linux.org.uk, Rob Herring <rob.herring@...xeda.com>
Subject: Re: [PATCH 3/3] ARM: gic: add OF based initialization

Hi Rob,

Apologies for the noise!  One minor comment below.

Jamie

On Tue, Sep 20, 2011 at 03:24:04PM -0500, Rob Herring wrote:
> From: Rob Herring <rob.herring@...xeda.com>
> 
> This adds ARM gic interrupt controller initialization using device tree
> data.
> 
> The initialization function is intended to be called by of_irq_init
> function like this:
> 
> const static struct of_device_id irq_match[] = {
>         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
>         {}
> };
> 
> static void __init init_irqs(void)
> {
>         of_irq_init(irq_match);
> }
> 
> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
> ---
[...]
> diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
> index 435d3f8..2862d0e 100644
> --- a/arch/arm/include/asm/hardware/gic.h
> +++ b/arch/arm/include/asm/hardware/gic.h
> @@ -33,10 +33,21 @@
>  #define GIC_DIST_SOFTINT		0xf00
>  
>  #ifndef __ASSEMBLY__
> +#include <linux/irqdomain.h>
> +
>  extern void __iomem *gic_cpu_base_addr;
>  extern struct irq_chip gic_arch_extn;
>  
>  void gic_init(unsigned int, unsigned int, void __iomem *, void __iomem *);
> +#ifdef CONFIG_OF
> +int gic_of_init(struct device_node *node, struct device_node *parent);
> +#else
> +static inline void gic_of_init(struct device_node *node,
> +			       struct device_node *parent)

This should return int?

> +{
> +	return -ENODEV;
> +}
> +#endif
--
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