diff options
Diffstat (limited to 'drivers/iio/adc/ad7791.c')
| -rw-r--r-- | drivers/iio/adc/ad7791.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c index 76118fe22db8..597c2686ffa4 100644 --- a/drivers/iio/adc/ad7791.c +++ b/drivers/iio/adc/ad7791.c @@ -310,15 +310,11 @@ static int ad7791_read_raw(struct iio_dev *indio_dev, return -EINVAL; } -static int ad7791_write_raw(struct iio_dev *indio_dev, +static int __ad7791_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { struct ad7791_state *st = iio_priv(indio_dev); - int ret, i; - - ret = iio_device_claim_direct_mode(indio_dev); - if (ret) - return ret; + int i; switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: @@ -328,22 +324,31 @@ static int ad7791_write_raw(struct iio_dev *indio_dev, break; } - if (i == ARRAY_SIZE(ad7791_sample_freq_avail)) { - ret = -EINVAL; - break; - } + if (i == ARRAY_SIZE(ad7791_sample_freq_avail)) + return -EINVAL; st->filter &= ~AD7791_FILTER_RATE_MASK; st->filter |= i; ad_sd_write_reg(&st->sd, AD7791_REG_FILTER, sizeof(st->filter), st->filter); - break; + return 0; default: - ret = -EINVAL; + return -EINVAL; } +} + +static int ad7791_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + int ret; + + if (!iio_device_claim_direct(indio_dev)) + return -EBUSY; + + ret = __ad7791_write_raw(indio_dev, chan, val, val2, mask); - iio_device_release_direct_mode(indio_dev); + iio_device_release_direct(indio_dev); return ret; } |