struct v4l2_subdev;
struct v4l2_async_notifier;
-/* A random max subdevice number, used to allocate an array on stack */
-#define V4L2_MAX_SUBDEVS 128U
-
/**
* enum v4l2_async_match_type - type of asynchronous subdevice logic to be used
* in order to identify a match
* @match.custom.priv:
* Driver-specific private struct with match parameters
* to be used if %V4L2_ASYNC_MATCH_CUSTOM.
+ * @asd_list: used to add struct v4l2_async_subdev objects to the
+ * master notifier @asd_list
* @list: used to link struct v4l2_async_subdev objects, waiting to be
* probed, to a notifier->waiting list
*
unsigned short address;
} i2c;
struct {
- bool (*match)(struct device *,
- struct v4l2_async_subdev *);
+ bool (*match)(struct device *dev,
+ struct v4l2_async_subdev *sd);
void *priv;
} custom;
} match;
/* v4l2-async core private: not to be used by drivers */
struct list_head list;
+ struct list_head asd_list;
};
/**
* struct v4l2_async_notifier - v4l2_device notifier data
*
* @ops: notifier operations
- * @num_subdevs: number of subdevices used in the subdevs array
- * @max_subdevs: number of subdevices allocated in the subdevs array
- * @subdevs: array of pointers to subdevice descriptors
* @v4l2_dev: v4l2_device of the root notifier, NULL otherwise
* @sd: sub-device that registered the notifier, NULL otherwise
* @parent: parent notifier
+ * @asd_list: master list of struct v4l2_async_subdev
* @waiting: list of struct v4l2_async_subdev, waiting for their drivers
* @done: list of struct v4l2_subdev, already probed
* @list: member in a global list of notifiers
*/
struct v4l2_async_notifier {
const struct v4l2_async_notifier_operations *ops;
- unsigned int num_subdevs;
- unsigned int max_subdevs;
- struct v4l2_async_subdev **subdevs;
struct v4l2_device *v4l2_dev;
struct v4l2_subdev *sd;
struct v4l2_async_notifier *parent;
+ struct list_head asd_list;
struct list_head waiting;
struct list_head done;
struct list_head list;
};
+/**
+ * v4l2_async_notifier_init - Initialize a notifier.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ *
+ * This function initializes the notifier @asd_list. It must be called
+ * before the first call to @v4l2_async_notifier_add_subdev.
+ */
+void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier);
+
+/**
+ * v4l2_async_notifier_add_subdev - Add an async subdev to the
+ * notifier's master asd list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @asd: pointer to &struct v4l2_async_subdev
+ *
+ * Call this function before registering a notifier to link the
+ * provided asd to the notifiers master @asd_list.
+ */
+int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
+ struct v4l2_async_subdev *asd);
+
+/**
+ * v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
+ * subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @fwnode: fwnode handle of the sub-device to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * Allocate a fwnode-matched asd of size asd_struct_size, and add it
+ * to the notifiers @asd_list.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
+ struct fwnode_handle *fwnode,
+ unsigned int asd_struct_size);
+
+/**
+ * v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
+ * subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @adapter_id: I2C adapter ID to be matched
+ * @address: I2C address of sub-device to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * Same as above but for I2C matched sub-devices.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
+ int adapter_id, unsigned short address,
+ unsigned int asd_struct_size);
+
+/**
+ * v4l2_async_notifier_add_devname_subdev - Allocate and add a device-name
+ * async subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @device_name: device name string to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * Same as above but for device-name matched sub-devices.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
+ const char *device_name,
+ unsigned int asd_struct_size);
+
/**
* v4l2_async_notifier_register - registers a subdevice asynchronous notifier
*
struct v4l2_async_notifier *notifier);
/**
- * v4l2_async_notifier_unregister - unregisters a subdevice asynchronous notifier
+ * v4l2_async_notifier_unregister - unregisters a subdevice
+ * asynchronous notifier
*
* @notifier: pointer to &struct v4l2_async_notifier
*/
* Release memory resources related to a notifier, including the async
* sub-devices allocated for the purposes of the notifier but not the notifier
* itself. The user is responsible for calling this function to clean up the
- * notifier after calling @v4l2_async_notifier_parse_fwnode_endpoints or
+ * notifier after calling
+ * @v4l2_async_notifier_add_subdev,
+ * @v4l2_async_notifier_parse_fwnode_endpoints or
* @v4l2_fwnode_reference_parse_sensor_common.
*
* There is no harm from calling v4l2_async_notifier_cleanup in other
* An error is returned if the module is no longer loaded on any attempts
* to register it.
*/
-int __must_check v4l2_async_register_subdev_sensor_common(
- struct v4l2_subdev *sd);
+int __must_check
+v4l2_async_register_subdev_sensor_common(struct v4l2_subdev *sd);
/**
* v4l2_async_unregister_subdev - unregisters a sub-device to the asynchronous
git.samba.org / sfrench / cifs-2.6.git / blobdiff