linux-kernel - RE: [PATCH] rtc: da9063: Fix ALARM interrupt registration.

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Date:	Thu, 20 Nov 2014 11:23:02 +0000
From:	"Opensource [Steve Twiss]" <stwiss.opensource@...semi.com>
To:	Dmitry Lavnikevich <d.lavnikevich@...-solutions.com>,
	Support Opensource <Support.Opensource@...semi.com>,
	"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
	"rtc-linux@...glegroups.com" <rtc-linux@...glegroups.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] rtc: da9063: Fix ALARM interrupt registration.

On 20 November 2014 09:55 Dmitry Lavnikevich wrote:

> Call platform_get_irq_byname() returns local IRQ number. Use
> regmap_irq_get_virq() to get VIRQ instead.
> This fixes rtc initialization error:
> da9063-rtc da9063-rtc: Failed to request ALARM IRQ 1: -22
> 
> Signed-off-by: Dmitry Lavnikevich <d.lavnikevich@...-solutions.com>

Hi Dmitry,

Please refer to the previous patch :
http://patchwork.ozlabs.org/patch/329051/

Using platform_get_irq_byname() to retrieve the IRQ number
returns the VIRQ number rather than the local IRQ number for
the device. Passing that value then into regmap_irq_get_virq()
causes a failure because the function is expecting the local
IRQ number (e.g. 0, 1, 2, 3, etc).

> ---
>  drivers/rtc/rtc-da9063.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c
> index 731ed1a..04743a6 100644
> --- a/drivers/rtc/rtc-da9063.c
> +++ b/drivers/rtc/rtc-da9063.c
> @@ -315,6 +315,7 @@ static int da9063_rtc_probe(struct platform_device
> *pdev)
>  	platform_set_drvdata(pdev, rtc);
> 
>  	irq_alarm = platform_get_irq_byname(pdev, "ALARM");
> +	irq_alarm = regmap_irq_get_virq(da9063->regmap_irq, irq_alarm);
>  	ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
>  					da9063_alarm_event,
>  					IRQF_TRIGGER_LOW |
> IRQF_ONESHOT,
> --
> 2.1.3

This patch above gives the following error when running on the DA9063:

da9063-rtc da9063-rtc: Failed to request ALARM IRQ -22: -22
da9063-rtc: probe of da9063-rtc failed with error -22

Regards,
Steve
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