lkml.org 
[lkml]   [2011]   [Apr]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] uio/pdrv_genirq: Add OF support
Date
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 "uio" compatible string:
static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
{ .compatible = "uio", },
{ /* empty for now */ },
};

Signed-off-by: Michal Simek <monstr@monstr.eu>

---

v3: Fix irq binding
Use "devicetree" as version string

v2: Remove additional resource binding
Setup correct version string
Clear compatible string
---
drivers/uio/uio_pdrv_genirq.c | 42 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
index 7174d51..c8d565a 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 +101,30 @@ 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 < 0) {
+ uioinfo->irq = UIO_IRQ_NONE;
+ dev_info(&pdev->dev, "no IRQ found\n");
+ } else {
+ uioinfo->irq = irq;
+ dev_info(&pdev->dev, "irq %d\n", (u32)uioinfo->irq);
+ }
+ }
+
if (!uioinfo || !uioinfo->name || !uioinfo->version) {
dev_err(&pdev->dev, "missing platform_data\n");
goto bad0;
@@ -180,6 +208,10 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
kfree(priv);
pm_runtime_disable(&pdev->dev);
bad0:
+ /* kfree uioinfo for CONFIG_OF */
+ if (!pdev->dev.platform_data)
+ kfree(uioinfo);
+ bad2:
return ret;
}

@@ -215,6 +247,15 @@ 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,
@@ -222,6 +263,7 @@ 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,
},
};

--
1.5.5.6


\
 
 \ /
  Last update: 2011-04-18 10:53    [W:0.445 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site