linux-kernel - Re: [PATCH 1/1] Watchdog driver for AT32AP700X devices

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Message-Id: <20070607160910.34d64842.akpm@linux-foundation.org>
Date:	Thu, 7 Jun 2007 16:09:10 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Hans-Christian Egtvedt <hcegtvedt@...el.com>
Cc:	linux-kernel@...r.kernel.org,
	Haavard Skinnemoen <hskinnemoen@...el.com>,
	Wim Van Sebroeck <wim@...ana.be>
Subject: Re: [PATCH 1/1] Watchdog driver for AT32AP700X devices

On Wed,  6 Jun 2007 16:04:07 +0200
Hans-Christian Egtvedt <hcegtvedt@...el.com> wrote:

> This patch adds support for the built in watchdog in AT32AP700X devices.
> 
> Tested on AT32AP7000 and ATSTK1000.
> 
> Hardware documentation can be found in the AT32AP7000 datasheet.
> 
> ...
>
> +static int __init at32_wdt_probe(struct platform_device *pdev)
> +{
> +	struct resource	*regs;
> +	int ret;
> +
> +	if (wdt) {
> +		dev_dbg(&pdev->dev, "only 1 wdt instance supported.\n");
> +		return -EBUSY;
> +	}
> +
> +	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!regs) {
> +		dev_dbg(&pdev->dev, "missing mmio resource\n");
> +		return -ENXIO;
> +	}
> +
> +	wdt = kzalloc(sizeof(struct wdt_at32ap700x), GFP_KERNEL);
> +	if (!wdt) {
> +		dev_dbg(&pdev->dev, "no memory for wdt structure\n");
> +		return -ENOMEM;
> +	}
> +
> +	wdt->regs = ioremap(regs->start, regs->end - regs->start + 1);

I see an ioremap(), but there are no iounmap()s anywhere.


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