linux-kernel - Re: [PATCH 09/11] uio: uio_pdrv

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Message-ID: <20110727081748.GA18674@local>
Date:	Wed, 27 Jul 2011 10:17:48 +0200
From:	"Hans J. Koch" <hjk@...sjkoch.de>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, "Hans J. Koch" <hjk@...sjkoch.de>,
	Michal Simek <monstr@...str.eu>, Arnd Bergmann <arnd@...db.de>,
	John Williams <john.williams@...alogix.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Wolfram Sang <w.sang@...gutronix.de>
Subject: Re: [PATCH 09/11] uio: uio_pdrv_genirq: Add OF support

On Tue, Jul 26, 2011 at 09:05:19PM -0700, Greg Kroah-Hartman wrote:
> From: "Hans J. Koch" <hjk@...sjkoch.de>

This should read From: Michal Simek <monstr@...str.eu>

Thanks,
Hans

> 
> Adding OF binding to genirq.
> Version string is setup to the "devicetree".
> 
> Compatible string is not setup for now but you can add your
> custom compatible string to uio_of_genirq_match structure.
> 
> For example with "vendor,device" compatible string:
> static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
> 	{ .compatible = "vendor,device", },
> 	{ /* empty for now */ },
> };
> 
> Signed-off-by: Michal Simek <monstr@...str.eu>
> Signed-off-by: Hans J. Koch <hjk@...sjkoch.de>
> Reviewed-by: Wolfram Sang <w.sang@...gutronix.de>
> CC: Hans J. Koch <hjk@...sjkoch.de>
> CC: Arnd Bergmann <arnd@...db.de>
> CC: John Williams <john.williams@...alogix.com>
> CC: Grant Likely <grant.likely@...retlab.ca>
> CC: Wolfram Sang <w.sang@...gutronix.de>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> ---
>  drivers/uio/uio_pdrv_genirq.c |   43 +++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 43 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
> index 0f424af..f8f81db 100644
> --- a/drivers/uio/uio_pdrv_genirq.c
> +++ b/drivers/uio/uio_pdrv_genirq.c
> @@ -23,6 +23,10 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/slab.h>
>  
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_address.h>
> +
>  #define DRIVER_NAME "uio_pdrv_genirq"
>  
>  struct uio_pdrv_genirq_platdata {
> @@ -97,6 +101,27 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
>  	int ret = -EINVAL;
>  	int i;
>  
> +	if (!uioinfo) {
> +		int irq;
> +
> +		/* alloc uioinfo for one device */
> +		uioinfo = kzalloc(sizeof(*uioinfo), GFP_KERNEL);
> +		if (!uioinfo) {
> +			ret = -ENOMEM;
> +			dev_err(&pdev->dev, "unable to kmalloc\n");
> +			goto bad2;
> +		}
> +		uioinfo->name = pdev->dev.of_node->name;
> +		uioinfo->version = "devicetree";
> +
> +		/* Multiple IRQs are not supported */
> +		irq = platform_get_irq(pdev, 0);
> +		if (irq == -ENXIO)
> +			uioinfo->irq = UIO_IRQ_NONE;
> +		else
> +			uioinfo->irq = irq;
> +	}
> +
>  	if (!uioinfo || !uioinfo->name || !uioinfo->version) {
>  		dev_err(&pdev->dev, "missing platform_data\n");
>  		goto bad0;
> @@ -180,6 +205,10 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
>  	kfree(priv);
>  	pm_runtime_disable(&pdev->dev);
>   bad0:
> +	/* kfree uioinfo for OF */
> +	if (pdev->dev.of_node)
> +		kfree(uioinfo);
> + bad2:
>  	return ret;
>  }
>  
> @@ -193,6 +222,10 @@ static int uio_pdrv_genirq_remove(struct platform_device *pdev)
>  	priv->uioinfo->handler = NULL;
>  	priv->uioinfo->irqcontrol = NULL;
>  
> +	/* kfree uioinfo for OF */
> +	if (pdev->dev.of_node)
> +		kfree(priv->uioinfo);
> +
>  	kfree(priv);
>  	return 0;
>  }
> @@ -219,6 +252,15 @@ static const struct dev_pm_ops uio_pdrv_genirq_dev_pm_ops = {
>  	.runtime_resume = uio_pdrv_genirq_runtime_nop,
>  };
>  
> +#ifdef CONFIG_OF
> +static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
> +	{ /* empty for now */ },
> +};
> +MODULE_DEVICE_TABLE(of, uio_of_genirq_match);
> +#else
> +# define uio_of_genirq_match NULL
> +#endif
> +
>  static struct platform_driver uio_pdrv_genirq = {
>  	.probe = uio_pdrv_genirq_probe,
>  	.remove = uio_pdrv_genirq_remove,
> @@ -226,6 +268,7 @@ static struct platform_driver uio_pdrv_genirq = {
>  		.name = DRIVER_NAME,
>  		.owner = THIS_MODULE,
>  		.pm = &uio_pdrv_genirq_dev_pm_ops,
> +		.of_match_table = uio_of_genirq_match,
>  	},
>  };
>  
> -- 
> 1.7.6
> 
> 
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