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uio: uio_pdrv_genirq: Add OF support

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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@monstr.eu>
Signed-off-by: Hans J. Koch <hjk@hansjkoch.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
CC: Hans J. Koch <hjk@hansjkoch.de>
CC: Arnd Bergmann <arnd@arndb.de>
CC: John Williams <john.williams@petalogix.com>
CC: Grant Likely <grant.likely@secretlab.ca>
CC: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hans J. Koch 2011-07-07 23:11:38 +02:00 committed by Greg Kroah-Hartman
parent 1e4de81653
commit 27760f8686
1 changed files with 43 additions and 0 deletions
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43
drivers/uio/uio_pdrv_genirq.c
View File

@ -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,
},
};