linux-kernel - Re: [PATCH v3 2/8] wlcore: set irq_flags in the board files instead of hiding behind a quirk

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Date:	Wed, 3 Jul 2013 17:15:25 +0300
From:	Luciano Coelho <coelho@...com>
To:	<linux-wireless@...r.kernel.org>
CC:	<tony@...mide.com>, <nsekhar@...com>, <mturquette@...aro.org>,
	<mark.rutland@....com>, <balbi@...com>, <grant.likely@...aro.org>,
	<rob.herring@...xeda.com>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <nm@...com>
Subject: Re: [PATCH v3 2/8] wlcore: set irq_flags in the board files instead
 of hiding behind a quirk

On Wed, 2013-07-03 at 17:03 +0300, Luciano Coelho wrote:
> The platform_quirk element in the platform data was used to change the
> way the IRQ is triggered.  When set, the EDGE_IRQ quirk would change
> the irqflags used and treat edge trigger differently from the rest.
> 
> Instead of hiding this irq flag setting behind the quirk, have the
> board files set the flags during initialization.  This will be more
> meaningful than driver-specific quirks when we switch to DT.
> 
> Additionally, fix missing gpio_request() calls in the boarding files
> (so that setting the flags actually works).
> 
> Cc: Tony Lindgren <tony@...mide.com>
> Cc: Sekhar Nori <nsekhar@...com>
> Signed-off-by: Luciano Coelho <coelho@...com>
> ---

[...]

> @@ -5928,16 +5927,21 @@ static void wlcore_nvs_cb(const struct firmware *fw, void *context)
>  	wlcore_adjust_conf(wl);
>  
>  	wl->irq = platform_get_irq(pdev, 0);
> -	wl->platform_quirks = pdata->platform_quirks;
>  	wl->if_ops = pdev_data->if_ops;
>  
> -	if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
> -		irqflags = IRQF_TRIGGER_RISING;
> -	else
> -		irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
> +	irq_data = irq_get_irq_data(wl->irq);
> +	if (!irq_data) {
> +		wl1271_error("couldn't get irq data for irq %d\n", wl->irq);
> +		ret = -EINVAL;
> +		goto out_free_nvs;
> +	}
> +
> +	wl->irq_flags = irqd_get_trigger_type(irq_data);

BTW, there seems to be a patch on its way to make reading the flags
easier (ie. no need to get the irq_data first):

http://mid.gmane.org/1367945288-5625-1-git-send-email-javier@dowhile0.org

I'm not sure if this is going to be taken in, but if it does, it would
be nice to change the code here to use the new irq_get_trigger_type()
function.

--
Luca.

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