linux-kernel - Re: [PATCH V2 4/7] rtc: PCF50633 rtc driver

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Date:	Thu, 18 Dec 2008 20:41:43 +0530
From:	Balaji Rao <balajirrao@...nmoko.org>
To:	Alessandro Zummo <alessandro.zummo@...ertech.it>
Cc:	linux-kernel@...r.kernel.org, Andy Green <andy@...nmoko.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH V2 4/7] rtc: PCF50633 rtc driver

On Thu, Dec 18, 2008 at 10:03:10AM +0100, Alessandro Zummo wrote:
> On Thu, 18 Dec 2008 11:27:26 +0530
> Balaji Rao <balajirrao@...nmoko.org> wrote:
> 
> > Changes from V1:
> > 	- Removed include/linux/mfd/pcf50633/rtc.h and moved defenitions into
> > 	  the source file.
> > 	- Remove PIE and introduce UIE support. UIE being the one actually
> > 	  supported in the chip.
> > 
> > Alessandro, I'll change to the new API for AIE once it appears upstream.
> 
>  Ok, I guess the driver will not go in tomorrow, so you can wait.
>  I'd add it now, while you're at it :)
> 

OK! :) So that I can change when it's in -next ?

> > +config RTC_DRV_PCF50633
> > +	depends on MFD_PCF50633
> > +	tristate "NXP PCF50633 RTC"
> > +	help
> > +	  If you say yes here you get support for the NXP PCF50633 RTC.
> 
>  a more detailed description please stating which platforms commonly
>  have this rtc
> 

OK.

> > +static int __devinit pcf50633_rtc_probe(struct platform_device *pdev)
> > +{
> > +	struct pcf50633_subdev_pdata *pdata;
> > +	struct pcf50633_rtc *rtc;
> > +	struct rtc_device *rtc_dev;
> > +
> > +	rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev,
> > +				&pcf50633_rtc_ops, THIS_MODULE);
> > +
> > +	if (IS_ERR(rtc_dev))
> > +		return PTR_ERR(rtc_dev);
> > +
> > +	rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
> > +	if (!rtc) {
> > +		dev_err(&pdev->dev, "allocation of pcf50633_rtc failed\n");
> > +		rtc_device_unregister(rtc_dev);
> > +		return -ENOMEM;
> > +	}
> 
>  once registered, the rtc could be immediately in use. you should first allocate
>  and setup your data structures and only then register the device:
> 

Oh, yea right. Will fix.

> > +static int __devexit pcf50633_rtc_remove(struct platform_device *pdev)
> > +{
> > +	struct pcf50633_rtc *rtc;
> > +
> > +	rtc = platform_get_drvdata(pdev);
> > +	rtc_device_unregister(rtc->rtc_dev);
> > +
> > +	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
> > +	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND);
> 
>  please remove rtc before unregistering
> 

Sorry, didn't get you meant.

Thank you for the review.

	-Balaji
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