linux-kernel - Re: [PATCH v2 1/2] i2c: i2c-ocores: Add irq support for sparc

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Date:	Tue, 13 Nov 2012 12:10:55 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	Andreas Larsson <andreas@...sler.com>
Cc:	Ben Dooks <ben-linux@...ff.org>,
	Peter Korsgaard <jacmet@...site.dk>, linux-i2c@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	software@...sler.com
Subject: Re: [PATCH v2 1/2] i2c: i2c-ocores: Add irq support for sparc

Hi,

On Mon, Nov 12, 2012 at 05:59:50PM +0100, Andreas Larsson wrote:
> Add sparc support by using platform_get_irq instead of platform_get_resource.
> There are no platform resources of type IORESOURCE_IRQ for sparc, but
> platform_get_irq works for sparc. In the non-sparc case platform_get_irq
> internally uses platform_get_resource.
> 
> Signed-off-by: Andreas Larsson <andreas@...sler.com>
> Acked-by: Peter Korsgaard <jacmet@...site.dk>
> ---
> Changes since v1:
>  - platform_get_irq now works for sparc, so that is used for all platforms
>  - Acked by Peter Korsgaard <jacmet@...site.dk>
> 
>  drivers/i2c/busses/i2c-ocores.c |    9 +++++----
>  1 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
> index bffd550..0b71dc6 100644
> --- a/drivers/i2c/busses/i2c-ocores.c
> +++ b/drivers/i2c/busses/i2c-ocores.c
> @@ -267,7 +267,8 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  {
>  	struct ocores_i2c *i2c;
>  	struct ocores_i2c_platform_data *pdata;
> -	struct resource *res, *res2;
> +	struct resource *res;
> +	int irq;
>  	int ret;
>  	int i;
>  
> @@ -275,8 +276,8 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  	if (!res)
>  		return -ENODEV;
>  
> -	res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -	if (!res2)
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
>  		return -ENODEV;

Why not pass the error code you got?

>  
>  	i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
> @@ -313,7 +314,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  	ocores_init(i2c);
>  
>  	init_waitqueue_head(&i2c->wait);
> -	ret = devm_request_irq(&pdev->dev, res2->start, ocores_isr, 0,
> +	ret = devm_request_irq(&pdev->dev, irq, ocores_isr, 0,
>  			       pdev->name, i2c);
>  	if (ret) {
>  		dev_err(&pdev->dev, "Cannot claim IRQ\n");

Rest looks good.

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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