V4L/DVB (11705): soc-camera: prepare for the platform driver conversion
Add a platform driver to soc_camera.c. This way we preserve backwards
compatibility with existing platforms and can start converting them one by one
to the new platform-device soc-camera interface.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c
index 2d341f5..2014e9e 100644
--- a/drivers/media/video/soc_camera.c
+++ b/drivers/media/video/soc_camera.c
@@ -16,19 +16,21 @@
* published by the Free Software Foundation.
*/
-#include <linux/module.h>
-#include <linux/init.h>
#include <linux/device.h>
-#include <linux/list.h>
#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/platform_device.h>
#include <linux/vmalloc.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-dev.h>
-#include <media/videobuf-core.h>
#include <media/soc_camera.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf-core.h>
/* Default to VGA resolution */
#define DEFAULT_WIDTH 640
@@ -1159,6 +1161,57 @@
}
EXPORT_SYMBOL(soc_camera_video_stop);
+static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
+{
+ struct soc_camera_link *icl = pdev->dev.platform_data;
+ struct i2c_adapter *adap;
+ struct i2c_client *client;
+
+ if (!icl)
+ return -EINVAL;
+
+ adap = i2c_get_adapter(icl->i2c_adapter_id);
+ if (!adap) {
+ dev_warn(&pdev->dev, "Cannot get adapter #%d. No driver?\n",
+ icl->i2c_adapter_id);
+ /* -ENODEV and -ENXIO do not produce an error on probe()... */
+ return -ENOENT;
+ }
+
+ icl->board_info->platform_data = icl;
+ client = i2c_new_device(adap, icl->board_info);
+ if (!client) {
+ i2c_put_adapter(adap);
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, client);
+
+ return 0;
+}
+
+static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
+{
+ struct i2c_client *client = platform_get_drvdata(pdev);
+
+ if (!client)
+ return -ENODEV;
+
+ i2c_unregister_device(client);
+ i2c_put_adapter(client->adapter);
+
+ return 0;
+}
+
+static struct platform_driver __refdata soc_camera_pdrv = {
+ .probe = soc_camera_pdrv_probe,
+ .remove = __exit_p(soc_camera_pdrv_remove),
+ .driver = {
+ .name = "soc-camera-pdrv",
+ .owner = THIS_MODULE,
+ },
+};
+
static int __init soc_camera_init(void)
{
int ret = bus_register(&soc_camera_bus_type);
@@ -1168,8 +1221,14 @@
if (ret)
goto edrvr;
+ ret = platform_driver_register(&soc_camera_pdrv);
+ if (ret)
+ goto epdr;
+
return 0;
+epdr:
+ driver_unregister(&ic_drv);
edrvr:
bus_unregister(&soc_camera_bus_type);
return ret;
@@ -1177,6 +1236,7 @@
static void __exit soc_camera_exit(void)
{
+ platform_driver_unregister(&soc_camera_pdrv);
driver_unregister(&ic_drv);
bus_unregister(&soc_camera_bus_type);
}
@@ -1187,3 +1247,4 @@
MODULE_DESCRIPTION("Image capture bus driver");
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:soc-camera-pdrv");