linux-kernel - Re: [PATCH v5 3/9] rtc: at91sam9: replace devm_ioremap by devm_ioremap

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Date:	Mon, 22 Sep 2014 17:04:19 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Andrew Victor <linux@...im.org.za>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/9] rtc: at91sam9: replace devm_ioremap by
 devm_ioremap_resource

On 22/09/2014 at 11:10:52 +0200, Boris Brezillon wrote :
> Replace devm_ioremap calls by devm_ioremap_resource which already check
> resource consistency (resource != NULL) and print an error in case of
> failure.
> 
> Signed-off-by: Boris BREZILLON <boris.brezillon@...e-electrons.com>

Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>

> ---
>  drivers/rtc/rtc-at91sam9.c | 29 ++++++++++-------------------
>  1 file changed, 10 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
> index 74a9ca0..38a2693 100644
> --- a/drivers/rtc/rtc-at91sam9.c
> +++ b/drivers/rtc/rtc-at91sam9.c
> @@ -306,18 +306,11 @@ static const struct rtc_class_ops at91_rtc_ops = {
>   */
>  static int at91_rtc_probe(struct platform_device *pdev)
>  {
> -	struct resource	*r, *r_gpbr;
> +	struct resource	*r;
>  	struct sam9_rtc	*rtc;
>  	int		ret, irq;
>  	u32		mr;
>  
> -	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	r_gpbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> -	if (!r || !r_gpbr) {
> -		dev_err(&pdev->dev, "need 2 ressources\n");
> -		return -ENODEV;
> -	}
> -
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0) {
>  		dev_err(&pdev->dev, "failed to get interrupt resource\n");
> @@ -335,18 +328,16 @@ static int at91_rtc_probe(struct platform_device *pdev)
>  		device_init_wakeup(&pdev->dev, 1);
>  
>  	platform_set_drvdata(pdev, rtc);
> -	rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
> -	if (!rtc->rtt) {
> -		dev_err(&pdev->dev, "failed to map registers, aborting.\n");
> -		return -ENOMEM;
> -	}
>  
> -	rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
> -				resource_size(r_gpbr));
> -	if (!rtc->gpbr) {
> -		dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
> -		return -ENOMEM;
> -	}
> +	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	rtc->rtt = devm_ioremap_resource(&pdev->dev, r);
> +	if (IS_ERR(rtc->rtt))
> +		return PTR_ERR(rtc->rtt);
> +
> +	r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +	rtc->gpbr = devm_ioremap_resource(&pdev->dev, r);
> +	if (IS_ERR(rtc->gpbr))
> +		return PTR_ERR(rtc->rtt);
>  
>  	mr = rtt_readl(rtc, MR);
>  
> -- 
> 1.9.1
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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