From dd99120c7165c6873a423977d1eaa41b6e2d1ffc Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 23 Nov 2008 12:19:45 -0300 Subject: 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 Signed-off-by: Mauro Carvalho Chehab --- include/media/v4l2-common.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'include/media/v4l2-common.h') 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_driver; 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 */ -- cgit v1.1