Commit 8ecb55b8 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Merge tag 'iio-fixes-for-3.19a' of... 

Merge tag 'iio-fixes-for-3.19a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First round of IIO fixes for the 3.19 cycle.

* ad799x fix ad7991/ad7995/ad7999 setup as they do not have a configuration
  register to write to.  It is written during the convesion sequence. As
  such we don't want to write to it at other times.
* Fix iio_channel_read utility function to return to ensure it is apparent
  if the relevant element is not there. This avoids using a wrong value
  if some channels have the element and others do not.
parents b7392d22 65de7654

drivers/iio/adc/ad799x.c

+13 −2
Original line number Diff line number Diff line
@@ -143,9 +143,15 @@ static int ad799x_write_config(struct ad799x_state *st, u16 val) 
	case ad7998:

		return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,

			val);

	default:

	case ad7992:

	case ad7993:

	case ad7994:

		return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,

			val);

	default:

		/* Will be written when doing a conversion */

		st->config = val;

		return 0;

	}

}
@@ -155,8 +161,13 @@ static int ad799x_read_config(struct ad799x_state *st) 
	case ad7997:

	case ad7998:

		return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);

	default:

	case ad7992:

	case ad7993:

	case ad7994:

		return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);

	default:

		/* No readback support */

		return st->config;

	}

}

drivers/iio/inkern.c

+3 −0
Original line number Diff line number Diff line
@@ -449,6 +449,9 @@ static int iio_channel_read(struct iio_channel *chan, int *val, int *val2, 
	if (val2 == NULL)

		val2 = &unused;



	if(!iio_channel_has_info(chan->channel, info))

		return -EINVAL;



	if (chan->indio_dev->info->read_raw_multi) {

		ret = chan->indio_dev->info->read_raw_multi(chan->indio_dev,

					chan->channel, INDIO_MAX_RAW_ELEMENTS,

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