[media] V4L: Add V4L2_ASYNC_MATCH_OF subdev matching type
Add support for matching by device_node pointer. This allows the notifier user to simply pass a list of device_node pointers corresponding to sub-devices. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -39,6 +39,11 @@ static bool match_devname(struct device *dev, struct v4l2_async_subdev *asd)
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return !strcmp(asd->match.device_name.name, dev_name(dev));
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}
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static bool match_of(struct device *dev, struct v4l2_async_subdev *asd)
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{
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return dev->of_node == asd->match.of.node;
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}
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static LIST_HEAD(subdev_list);
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static LIST_HEAD(notifier_list);
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static DEFINE_MUTEX(list_lock);
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@ -66,6 +71,9 @@ static struct v4l2_async_subdev *v4l2_async_belongs(struct v4l2_async_notifier *
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case V4L2_ASYNC_MATCH_I2C:
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match = match_i2c;
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break;
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case V4L2_ASYNC_MATCH_OF:
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match = match_of;
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break;
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default:
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/* Cannot happen, unless someone breaks us */
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WARN_ON(true);
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@ -145,6 +153,7 @@ int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
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case V4L2_ASYNC_MATCH_CUSTOM:
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case V4L2_ASYNC_MATCH_DEVNAME:
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case V4L2_ASYNC_MATCH_I2C:
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case V4L2_ASYNC_MATCH_OF:
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break;
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default:
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dev_err(notifier->v4l2_dev ? notifier->v4l2_dev->dev : NULL,
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@ -15,6 +15,7 @@
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#include <linux/mutex.h>
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struct device;
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struct device_node;
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struct v4l2_device;
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struct v4l2_subdev;
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struct v4l2_async_notifier;
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@ -26,6 +27,7 @@ enum v4l2_async_match_type {
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V4L2_ASYNC_MATCH_CUSTOM,
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V4L2_ASYNC_MATCH_DEVNAME,
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V4L2_ASYNC_MATCH_I2C,
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V4L2_ASYNC_MATCH_OF,
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};
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/**
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@ -38,6 +40,9 @@ enum v4l2_async_match_type {
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struct v4l2_async_subdev {
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enum v4l2_async_match_type match_type;
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union {
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struct {
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const struct device_node *node;
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} of;
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struct {
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const char *name;
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} device_name;
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