static int lm3554_detect(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct i2c_adapter *adapter = client->adapter;
struct lm3554 *flash = to_lm3554(sd);
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "lm3554_detect i2c error\n");
return -ENODEV;
}
/* Power up the flash driver and reset it */
ret = lm3554_s_power(&flash->sd, 1);
if (ret < 0)
return ret;
lm3554_hw_reset(client);
/* Setup default values. This makes sure that the chip is in a known
* state.
*/
ret = lm3554_setup(flash);
if (ret < 0)
goto fail;
dev_dbg(&client->dev, "Successfully detected lm3554 LED flash\n");
lm3554_s_power(&flash->sd, 0);
return 0;
fail:
lm3554_s_power(&flash->sd, 0);
return ret;
}
static int lm3554_detect(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct i2c_adapter *adapter = client->adapter;
struct lm3554 *flash = to_lm3554(sd);
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "lm3554_detect i2c error\n");
return -ENODEV;
}
/* Power up the flash driver and reset it */
ret = lm3554_s_power(&flash->sd, 1);
if (ret < 0) {
dev_err(&client->dev, "Failed to power on lm3554 LED flash\n");
} else {
dev_dbg(&client->dev, "Successfully detected lm3554 LED flash\n");
lm3554_s_power(&flash->sd, 0);
}
return ret;
}
static int lm3554_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return lm3554_s_power(sd, 0);
}
static int lm3554_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return lm3554_s_power(sd, 1);
}
