Hi,
El Thu, Aug 23, 2012 at 04:20:21PM +0530 Patil, Rachna ha dit:
> This patch adds support for TI's ADC driver.
> This is a multifunctional device.
> Analog input lines are provided on which
> voltage measurements can be carried out.
> You can have upto 8 input lines.
>
> Signed-off-by: Patil, Rachna <rachna@xxxxxx>
> ---
>
> diff --git a/drivers/iio/adc/ti_adc.c b/drivers/iio/adc/ti_adc.c
> ...
> +static int __devinit tiadc_probe(struct platform_device *pdev)
> +{
> + struct iio_dev *idev;
> + int err;
> + struct adc_device *adc_dev = NULL;
> + struct ti_tscadc_dev *tscadc_dev = pdev->dev.platform_data;
> + struct mfd_tscadc_board *board_data;
> +
> + board_data = (struct mfd_tscadc_board *)tscadc_dev->dev->platform_data;
> + if (!board_data) {
> + dev_err(tscadc_dev->dev, "Could not find platform data\n");
> + return -EINVAL;
> + }
> +
> + idev = iio_device_alloc(sizeof(struct adc_device));
> + if (idev == NULL) {
> + dev_err(&pdev->dev, "failed to allocate iio device.\n");
> + err = -ENOMEM;
> + goto err_ret;
> + }
> + adc_dev = iio_priv(idev);
> +
> + tscadc_dev->adc = adc_dev;
> + adc_dev->mfd_tscadc = tscadc_dev;
> + adc_dev->idev = idev;
> + adc_dev->adc_channels = board_data->adc_init->adc_channels;
> +
> + idev->dev.parent = &pdev->dev;
> + idev->name = dev_name(&pdev->dev);
> + idev->modes = INDIO_DIRECT_MODE;
> + idev->info = &tiadc_info;
> +
> + adc_step_config(adc_dev);
> +
> + err = tiadc_channel_init(idev, adc_dev);
> + if (err < 0)
> + goto err_fail;
> +
> + err = iio_device_register(idev);
> + if (err)
> + goto err_free_channels;
> +
> + dev_info(&pdev->dev, "attached adc driver\n");
> + platform_set_drvdata(pdev, idev);
> +
> + return 0;
> +
> +err_free_channels:
> + tiadc_channel_remove(idev);
> +err_fail:
> + iio_device_unregister(idev);
> + iio_device_free(idev);
> +err_ret:
> + platform_set_drvdata(pdev, NULL);
not necessary, the platform device doesn't exist anymore
> + iio_device_free(idev);
already done some lines above and could be executed without having
allocated the iio device (when iio_device_alloc() fails)
> +static int __devexit tiadc_remove(struct platform_device *pdev)
> +{
> + struct ti_tscadc_dev *tscadc_dev = pdev->dev.platform_data;
> + struct adc_device *adc_dev = tscadc_dev->adc;
> + struct iio_dev *idev = adc_dev->idev;
> +
> + iio_device_unregister(idev);
> + tiadc_channel_remove(idev);
> +
> + tscadc_dev->adc = NULL;
> +
> + iio_device_free(idev);
> + platform_set_drvdata(pdev, NULL);
see above
best regards
--
Matthias Kaehlcke
Embedded Linux Developer
Amsterdam
If sharing a thing in no way diminishes it,
it is not rightly owned if it is not shared
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
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