Em 26-11-2010 07:54, Richard Röjfors escreveu:
> This patch adds an open function to the radio-timb, which adds the DSP an
> tuner
> to the I2C bus.
>
> Signed-off-by: Richard Röjfors <[email protected]>
> ---
> diff --git a/drivers/media/radio/radio-timb.c
> b/drivers/media/radio/radio-timb.c
> index a185610..2b7abe2 100644
> --- a/drivers/media/radio/radio-timb.c
> +++ b/drivers/media/radio/radio-timb.c
> @@ -141,9 +141,50 @@ static const struct v4l2_ioctl_ops timbradio_ioctl_ops =
> {
> .vidioc_s_ctrl = timbradio_vidioc_s_ctrl
> };
>
> +static int timbradio_fops_open(struct file *file)
> +{
> + struct timbradio *tr = video_drvdata(file);
> + struct i2c_adapter *adapt;
> + int err = 0;
> +
> + mutex_lock(&tr->lock);
> +
> + /* find the I2C bus */
> + adapt = i2c_get_adapter(tr->pdata.i2c_adapter);
> + if (!adapt) {
> + printk(KERN_ERR DRIVER_NAME": No I2C bus\n");
> + err = -ENODEV;
> + goto out;
> + }
> +
> + /* now find the tuner and dsp */
> + if (!tr->sd_dsp)
> + tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, adapt,
> + tr->pdata.dsp.module_name, tr->pdata.dsp.info, NULL);
> +
> + if (!tr->sd_tuner)
> + tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, adapt,
> + tr->pdata.tuner.module_name, tr->pdata.tuner.info,
> + NULL);
Why are you doing it at open? It would be better to attach the I2C devices
during the
device probing time.
> +
> + i2c_put_adapter(adapt);
> +
> + if (!tr->sd_tuner || !tr->sd_dsp) {
> + printk(KERN_ERR DRIVER_NAME
> + ": Failed to get tuner or DSP\n");
> + err = -ENODEV;
> + goto out;
> + }
> +
> +out:
> + mutex_unlock(&tr->lock);
> + return err;
> +}
> +
> static const struct v4l2_file_operations timbradio_fops = {
> .owner = THIS_MODULE,
> .unlocked_ioctl = video_ioctl2,
> + .open = timbradio_fops_open,
> };
>
> static int __devinit timbradio_probe(struct platform_device *pdev)
>
> --
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