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Subject[PATCH 1/2] uio/pdrv_genirq: Refactor probe routine to expose a generic part
This patch refactors the probe routine, so that an of-version of a similiar
driver can pick it up later.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Hans J. Koch <hjk@linutronix.de>
Cc: Greg KH <gregkh@suse.de>
---
drivers/uio/uio_pdrv_genirq.c | 60 ++++++++++++++++++++------------------
include/linux/uio_pdrv_genirq.h | 13 ++++++++
2 files changed, 45 insertions(+), 28 deletions(-)
create mode 100644 include/linux/uio_pdrv_genirq.h
diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
index 3f06818..8f8a0f9 100644
--- a/drivers/uio/uio_pdrv_genirq.c
+++ b/drivers/uio/uio_pdrv_genirq.c
@@ -20,15 +20,10 @@
#include <linux/bitops.h>
#include <linux/interrupt.h>
#include <linux/stringify.h>
+#include <linux/uio_pdrv_genirq.h>

#define DRIVER_NAME "uio_pdrv_genirq"

-struct uio_pdrv_genirq_platdata {
- struct uio_info *uioinfo;
- spinlock_t lock;
- unsigned long flags;
-};
-
static irqreturn_t uio_pdrv_genirq_handler(int irq, struct uio_info *dev_info)
{
struct uio_pdrv_genirq_platdata *priv = dev_info->priv;
@@ -68,29 +63,18 @@ static int uio_pdrv_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
return 0;
}

-static int uio_pdrv_genirq_probe(struct platform_device *pdev)
+int __uio_pdrv_genirq_probe(struct device *dev, struct uio_info *uioinfo,
+ struct resource *resources, unsigned int num_resources)
{
- struct uio_info *uioinfo = pdev->dev.platform_data;
struct uio_pdrv_genirq_platdata *priv;
struct uio_mem *uiomem;
- int ret = -EINVAL;
- int i;
-
- if (!uioinfo || !uioinfo->name || !uioinfo->version) {
- dev_err(&pdev->dev, "missing platform_data\n");
- goto bad0;
- }
-
- if (uioinfo->handler || uioinfo->irqcontrol ||
- uioinfo->irq_flags & IRQF_SHARED) {
- dev_err(&pdev->dev, "interrupt configuration error\n");
- goto bad0;
- }
+ unsigned int i;
+ int ret;

priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
- dev_err(&pdev->dev, "unable to kmalloc\n");
+ dev_err(dev, "unable to kmalloc\n");
goto bad0;
}

@@ -100,14 +84,14 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)

uiomem = &uioinfo->mem[0];

- for (i = 0; i < pdev->num_resources; ++i) {
- struct resource *r = &pdev->resource[i];
+ for (i = 0; i < num_resources; ++i) {
+ struct resource *r = resources + i;

if (r->flags != IORESOURCE_MEM)
continue;

if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
- dev_warn(&pdev->dev, "device has more than "
+ dev_warn(dev, "device has more than "
__stringify(MAX_UIO_MAPS)
" I/O memory resources.\n");
break;
@@ -138,19 +122,39 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
uioinfo->irqcontrol = uio_pdrv_genirq_irqcontrol;
uioinfo->priv = priv;

- ret = uio_register_device(&pdev->dev, priv->uioinfo);
+ ret = uio_register_device(dev, priv->uioinfo);
if (ret) {
- dev_err(&pdev->dev, "unable to register uio device\n");
+ dev_err(dev, "unable to register uio device\n");
goto bad1;
}

- platform_set_drvdata(pdev, priv);
+ dev_set_drvdata(dev, priv);
return 0;
bad1:
kfree(priv);
bad0:
return ret;
}
+EXPORT_SYMBOL_GPL(__uio_pdrv_genirq_probe);
+
+static int uio_pdrv_genirq_probe(struct platform_device *pdev)
+{
+ struct uio_info *uioinfo = pdev->dev.platform_data;
+
+ if (!uioinfo || !uioinfo->name || !uioinfo->version) {
+ dev_err(&pdev->dev, "missing platform_data\n");
+ return -EINVAL;
+ }
+
+ if (uioinfo->handler || uioinfo->irqcontrol ||
+ uioinfo->irq_flags & IRQF_SHARED) {
+ dev_err(&pdev->dev, "interrupt configuration error\n");
+ return -EINVAL;
+ }
+
+ return __uio_pdrv_genirq_probe(&pdev->dev, uioinfo, pdev->resource,
+ pdev->num_resources);
+}

static int uio_pdrv_genirq_remove(struct platform_device *pdev)
{
diff --git a/include/linux/uio_pdrv_genirq.h b/include/linux/uio_pdrv_genirq.h
new file mode 100644
index 0000000..a410390
--- /dev/null
+++ b/include/linux/uio_pdrv_genirq.h
@@ -0,0 +1,13 @@
+#ifndef _LINUX_UIO_PDRV_GENIRQ_H
+#define _LINUX_UIO_PDRV_GENIRQ_H
+
+struct uio_pdrv_genirq_platdata {
+ struct uio_info *uioinfo;
+ spinlock_t lock;
+ unsigned long flags;
+};
+
+extern int __uio_pdrv_genirq_probe(struct device *dev, struct uio_info *uioinfo,
+ struct resource *resources, unsigned int num_resources);
+
+#endif
--
1.6.3.1


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