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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-21 18:26:04 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-23 14:04:21 +0300
commitb871915893c32473ef5ce0d075c1952ed8232ce1 (patch)
treee178fb8a7adc58662baf383d1029cec04e2b25f0 /include/media/v4l2-common.h
parenta39c57f8cd0526d8227468f8e0f88c4be4f97139 (diff)
downloadlinux-b871915893c32473ef5ce0d075c1952ed8232ce1.tar.xz
[media] v4l2-common.h: Add documentation for other functions
Not all functions at v4l2-common.h are documented. Add documentation for some other ones. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'include/media/v4l2-common.h')
-rw-r--r--include/media/v4l2-common.h43
1 files changed, 38 insertions, 5 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 9b1dfcd9e229..350cbf9fb10e 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -78,9 +78,26 @@
v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
} while (0)
-/* ------------------------------------------------------------------------- */
+/**
+ * v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl
+ *
+ * @qctrl: pointer to the &struct v4l2_queryctrl to be filled
+ * @min: minimum value for the control
+ * @max: maximum value for the control
+ * @step: control step
+ * @def: default value for the control
+ *
+ * Fills the &struct v4l2_queryctrl fields for the query control.
+ *
+ * .. note::
+ *
+ * This function assumes that the @qctrl->id field is filled.
+ *
+ * Returns -EINVAL if the control is not known by the V4L2 core, 0 on success.
+ */
-int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
+int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
+ s32 min, s32 max, s32 step, s32 def);
/* ------------------------------------------------------------------------- */
@@ -172,12 +189,28 @@ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
struct spi_device;
-/* Load an spi module and return an initialized v4l2_subdev struct.
- The client_type argument is the name of the chip that's on the adapter. */
+/**
+ * v4l2_spi_new_subdev - Load an spi module and return an initialized
+ * &struct v4l2_subdev.
+ *
+ *
+ * @v4l2_dev: pointer to &struct v4l2_device.
+ * @master: pointer to struct spi_master.
+ * @info: pointer to struct spi_board_info.
+ *
+ * returns a &struct v4l2_subdev pointer.
+ */
struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
struct spi_master *master, struct spi_board_info *info);
-/* Initialize a v4l2_subdev with data from an spi_device struct */
+/**
+ * v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an
+ * spi_device struct.
+ *
+ * @sd: pointer to &struct v4l2_subdev
+ * @spi: pointer to struct spi_device.
+ * @ops: pointer to &struct v4l2_subdev_ops
+ */
void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
const struct v4l2_subdev_ops *ops);
#endif