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path: root/drivers/uio
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Diffstat (limited to 'drivers/uio')
-rw-r--r--drivers/uio/uio_pdrv_genirq.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
index 31e799d9efe5..bae96d246760 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,
},
};