V4L/DVB (9821): v4l2-common: add i2c helper functions
Add helper functions to load i2c sub-devices, integrating them
into the v4l2-framework.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 2f8719a..f99c866 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -57,6 +57,29 @@
/* ------------------------------------------------------------------------- */
+/* These printk constructs can be used with v4l2_device and v4l2_subdev */
+#define v4l2_printk(level, dev, fmt, arg...) \
+ printk(level "%s: " fmt, (dev)->name , ## arg)
+
+#define v4l2_err(dev, fmt, arg...) \
+ v4l2_printk(KERN_ERR, dev, fmt , ## arg)
+
+#define v4l2_warn(dev, fmt, arg...) \
+ v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
+
+#define v4l2_info(dev, fmt, arg...) \
+ v4l2_printk(KERN_INFO, dev, fmt , ## arg)
+
+/* These three macros assume that the debug level is set with a module
+ parameter called 'debug'. */
+#define v4l2_dbg(level, debug, dev, fmt, arg...) \
+ do { \
+ if (debug >= (level)) \
+ v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
+ } while (0)
+
+/* ------------------------------------------------------------------------- */
+
/* Priority helper functions */
struct v4l2_prio_state {
@@ -104,11 +127,29 @@
struct i2c_adapter;
struct i2c_client;
struct i2c_device_id;
+struct v4l2_device;
+struct v4l2_subdev;
+struct v4l2_subdev_ops;
int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
const char *name,
int (*probe)(struct i2c_client *, const struct i2c_device_id *));
+/* Load an i2c module and return an initialized v4l2_subdev struct.
+ Only call request_module if module_name != NULL.
+ The client_type argument is the name of the chip that's on the adapter. */
+struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter,
+ const char *module_name, const char *client_type, u8 addr);
+/* Probe and load an i2c module and return an initialized v4l2_subdev struct.
+ Only call request_module if module_name != NULL.
+ The client_type argument is the name of the chip that's on the adapter. */
+struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter,
+ const char *module_name, const char *client_type,
+ const unsigned short *addrs);
+/* Initialize an v4l2_subdev with data from an i2c_client struct */
+void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
+ const struct v4l2_subdev_ops *ops);
+
/* ------------------------------------------------------------------------- */
/* Internal ioctls */