linux-kernel - Re: [PATCH v4 01/11] mfd: add pruss mfd driver.

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Date:	Thu, 28 Apr 2011 12:52:49 +0530
From:	"Subhasish Ghosh" <subhasish@...tralsolutions.com>
To:	"Marc Kleine-Budde" <mkl@...gutronix.de>
Cc:	"Russell King - ARM Linux" <linux@....linux.org.uk>,
	<sachi@...tralsolutions.com>,
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"Samuel Ortiz" <sameo@...ux.intel.com>, <nsekhar@...com>,
	"open list" <linux-kernel@...r.kernel.org>, <m-watkins@...com>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 01/11] mfd: add pruss mfd driver.

Hi,

On 04/27/2011 03:18 PM, Subhasish Ghosh wrote:
> My problem is, I am doing something like this:
>
> s32 pruss_writel_multi(struct device *dev, u32 offset,
>                u32 *pdatatowrite, u16 wordstowrite)
> {
>        struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
>        u32 __iomem *paddresstowrite;
>        u16 i;
>
>        paddresstowrite = pruss->ioaddr + offset;
>
>        for (i = 0; i < wordstowrite; i++)
>                iowrite32(*pdatatowrite++, paddresstowrite++);
>
>        return 0;
> }
>
> So, if I make paddresstowrite as void, it will not work. The above
> implementation does not generate any sparse errors though.

Yes, that why I can work with readb_multi even if I have void __iomen *.

But, how do I solve this problem. In the above function, I must use u32 
__iomem * 

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