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path: root/drivers/iio/adc/ad7793.c
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Diffstat (limited to 'drivers/iio/adc/ad7793.c')
-rw-r--r--drivers/iio/adc/ad7793.c33
1 files changed, 14 insertions, 19 deletions
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 7b07bb651671..847789bae821 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -369,13 +369,6 @@ static ssize_t ad7793_write_frequency(struct device *dev,
long lval;
int i, ret;
- mutex_lock(&indio_dev->mlock);
- if (iio_buffer_enabled(indio_dev)) {
- mutex_unlock(&indio_dev->mlock);
- return -EBUSY;
- }
- mutex_unlock(&indio_dev->mlock);
-
ret = kstrtol(buf, 10, &lval);
if (ret)
return ret;
@@ -383,20 +376,21 @@ static ssize_t ad7793_write_frequency(struct device *dev,
if (lval == 0)
return -EINVAL;
- ret = -EINVAL;
-
for (i = 0; i < 16; i++)
- if (lval == st->chip_info->sample_freq_avail[i]) {
- mutex_lock(&indio_dev->mlock);
- st->mode &= ~AD7793_MODE_RATE(-1);
- st->mode |= AD7793_MODE_RATE(i);
- ad_sd_write_reg(&st->sd, AD7793_REG_MODE,
- sizeof(st->mode), st->mode);
- mutex_unlock(&indio_dev->mlock);
- ret = 0;
- }
+ if (lval == st->chip_info->sample_freq_avail[i])
+ break;
+ if (i == 16)
+ return -EINVAL;
- return ret ? ret : len;
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ st->mode &= ~AD7793_MODE_RATE(-1);
+ st->mode |= AD7793_MODE_RATE(i);
+ ad_sd_write_reg(&st->sd, AD7793_REG_MODE, sizeof(st->mode), st->mode);
+ iio_device_release_direct_mode(indio_dev);
+
+ return len;
}
static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
@@ -790,6 +784,7 @@ static int ad7793_probe(struct spi_device *spi)
spi_set_drvdata(spi, indio_dev);
indio_dev->dev.parent = &spi->dev;
+ indio_dev->dev.of_node = spi->dev.of_node;
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = st->chip_info->channels;