diff options
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-i2c.c | 66 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-spi.c | 21 |
2 files changed, 54 insertions, 33 deletions
diff --git a/drivers/media/v4l2-core/v4l2-i2c.c b/drivers/media/v4l2-core/v4l2-i2c.c index d549291ab22b..5bf99e7c0c09 100644 --- a/drivers/media/v4l2-core/v4l2-i2c.c +++ b/drivers/media/v4l2-core/v4l2-i2c.c @@ -28,7 +28,8 @@ void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd) i2c_unregister_device(client); } -void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, +void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, + struct i2c_client *client, const char *devname, const char *postfix) { if (!devname) @@ -42,7 +43,7 @@ void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name); void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, - const struct v4l2_subdev_ops *ops) + const struct v4l2_subdev_ops *ops) { v4l2_subdev_init(sd, ops); sd->flags |= V4L2_SUBDEV_FL_IS_I2C; @@ -57,9 +58,11 @@ void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init); /* Load an i2c sub-device. */ -struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, - struct i2c_adapter *adapter, struct i2c_board_info *info, - const unsigned short *probe_addrs) +struct v4l2_subdev +*v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, + struct i2c_board_info *info, + const unsigned short *probe_addrs) { struct v4l2_subdev *sd = NULL; struct i2c_client *client; @@ -76,14 +79,16 @@ struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, else client = i2c_new_device(adapter, info); - /* Note: by loading the module first we are certain that c->driver - will be set if the driver was found. If the module was not loaded - first, then the i2c core tries to delay-load the module for us, - and then c->driver is still NULL until the module is finally - loaded. This delay-load mechanism doesn't work if other drivers - want to use the i2c device, so explicitly loading the module - is the best alternative. */ - if (client == NULL || client->dev.driver == NULL) + /* + * Note: by loading the module first we are certain that c->driver + * will be set if the driver was found. If the module was not loaded + * first, then the i2c core tries to delay-load the module for us, + * and then c->driver is still NULL until the module is finally + * loaded. This delay-load mechanism doesn't work if other drivers + * want to use the i2c device, so explicitly loading the module + * is the best alternative. + */ + if (!client || !client->dev.driver) goto error; /* Lock the module so we can safely get the v4l2_subdev pointer */ @@ -91,35 +96,44 @@ struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, goto error; sd = i2c_get_clientdata(client); - /* Register with the v4l2_device which increases the module's - use count as well. */ + /* + * Register with the v4l2_device which increases the module's + * use count as well. + */ if (v4l2_device_register_subdev(v4l2_dev, sd)) sd = NULL; /* Decrease the module use count to match the first try_module_get. */ module_put(client->dev.driver->owner); error: - /* If we have a client but no subdev, then something went wrong and - we must unregister the client. */ - if (client && sd == NULL) + /* + * If we have a client but no subdev, then something went wrong and + * we must unregister the client. + */ + if (client && !sd) i2c_unregister_device(client); return sd; } EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board); struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, - struct i2c_adapter *adapter, const char *client_type, - u8 addr, const unsigned short *probe_addrs) + struct i2c_adapter *adapter, + const char *client_type, + u8 addr, + const unsigned short *probe_addrs) { struct i2c_board_info info; - /* Setup the i2c board info with the device type and - the device address. */ + /* + * Setup the i2c board info with the device type and + * the device address. + */ memset(&info, 0, sizeof(info)); strscpy(info.type, client_type, sizeof(info.type)); info.addr = addr; - return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs); + return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, + probe_addrs); } EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev); @@ -132,8 +146,10 @@ unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd) } EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr); -/* Return a list of I2C tuner addresses to probe. Use only if the tuner - addresses are unknown. */ +/* + * Return a list of I2C tuner addresses to probe. Use only if the tuner + * addresses are unknown. + */ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type) { static const unsigned short radio_addrs[] = { diff --git a/drivers/media/v4l2-core/v4l2-spi.c b/drivers/media/v4l2-core/v4l2-spi.c index 15162659a63b..eadecdff7349 100644 --- a/drivers/media/v4l2-core/v4l2-spi.c +++ b/drivers/media/v4l2-core/v4l2-spi.c @@ -17,7 +17,7 @@ void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd) } void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, - const struct v4l2_subdev_ops *ops) + const struct v4l2_subdev_ops *ops) { v4l2_subdev_init(sd, ops); sd->flags |= V4L2_SUBDEV_FL_IS_SPI; @@ -29,12 +29,13 @@ void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, spi_set_drvdata(spi, sd); /* initialize name */ snprintf(sd->name, sizeof(sd->name), "%s %s", - spi->dev.driver->name, dev_name(&spi->dev)); + spi->dev.driver->name, dev_name(&spi->dev)); } EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init); struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, - struct spi_master *master, struct spi_board_info *info) + struct spi_master *master, + struct spi_board_info *info) { struct v4l2_subdev *sd = NULL; struct spi_device *spi = NULL; @@ -46,7 +47,7 @@ struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, spi = spi_new_device(master, info); - if (spi == NULL || spi->dev.driver == NULL) + if (!spi || !spi->dev.driver) goto error; if (!try_module_get(spi->dev.driver->owner)) @@ -54,8 +55,10 @@ struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, sd = spi_get_drvdata(spi); - /* Register with the v4l2_device which increases the module's - use count as well. */ + /* + * Register with the v4l2_device which increases the module's + * use count as well. + */ if (v4l2_device_register_subdev(v4l2_dev, sd)) sd = NULL; @@ -63,8 +66,10 @@ struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, module_put(spi->dev.driver->owner); error: - /* If we have a client but no subdev, then something went wrong and - we must unregister the client. */ + /* + * If we have a client but no subdev, then something went wrong and + * we must unregister the client. + */ if (!sd) spi_unregister_device(spi); |