linux-kernel - Re: [PATCH 19/35] arm: omap: irq: drop ti,intc-size support

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Date:	Tue, 29 Jul 2014 04:12:51 +0200
From:	Sebastian Reichel <sre@...nel.org>
To:	Felipe Balbi <balbi@...com>
Cc:	Tony Lindgren <tony@...mide.com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>, bcousson@...libre.com,
	linux@....linux.org.uk, khilman@...prootsystems.com,
	tglx@...utronix.de, jason@...edaemon.net,
	devicetree@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 19/35] arm: omap: irq: drop ti,intc-size support

Hi,

On Mon, Jul 28, 2014 at 04:16:07PM -0500, Felipe Balbi wrote:
> we don't need that anymore since specific
> devices are passing correct compatible flags.
> 
> Signed-off-by: Felipe Balbi <balbi@...com>
> ---
>  arch/arm/mach-omap2/irq.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
> index 7a4ead3..e70c26e 100644
> --- a/arch/arm/mach-omap2/irq.c
> +++ b/arch/arm/mach-omap2/irq.c
> @@ -313,9 +313,6 @@ static int __init intc_of_init(struct device_node *node,
>  	if (of_device_is_compatible(node, "ti,am33xx-intc"))
>  		nr_irq = 128;
>  
> -	if (of_property_read_u32(node, "ti,intc-size", &nr_irq))
> -		pr_warn("unable to get intc-size, default to %d\n", nr_irq);
> -

keeping this code would avoid breaking the DT API. I suggest to
change it to something like the following:

if (!of_property_read_u32(...))
    dev_warn(dev, "ti,intc-size is deprecated, please update your DT file");

Apart from that the Documentation [0] should be updated (add
deprecation notice for ti,intc-size and add new compatible values)
and maybe moved to [1] (where other SoCs put their irq controller
binding docs).

[0] Documentation/devicetree/bindings/arm/omap/intc.txt
[1] Documentation/devicetree/bindings/interrupt-controller/

-- Sebastian

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