diff options
| author | Sergiu Cuciurean <sergiu.cuciurean@analog.com> | 2020-05-14 11:19:38 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-05-16 17:29:54 +0200 |
| commit | 0b2884ef7fcad881556b79828a96f359c7f1fab6 (patch) | |
| tree | 1b5f5746db148aa3cd1d9690377fa3422bd65f52 /drivers/iio | |
| parent | iio: dac: ad5421: Replace indio_dev->mlock with own device lock (diff) | |
| download | linux-0b2884ef7fcad881556b79828a96f359c7f1fab6.tar.xz linux-0b2884ef7fcad881556b79828a96f359c7f1fab6.zip | |
iio: dac: ad5686: Replace indio_dev->mlock with own device lock
As part of the general cleanup of indio_dev->mlock, this change replaces
it with a local lock on the device's state structure.
Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/dac/ad5686.c | 10 | ||||
| -rw-r--r-- | drivers/iio/dac/ad5686.h | 2 |
2 files changed, 8 insertions, 4 deletions
diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index e06b29c565b9..8dd67da0a7da 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -127,9 +127,9 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, switch (m) { case IIO_CHAN_INFO_RAW: - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = st->read(st, chan->address); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); if (ret < 0) return ret; *val = (ret >> chan->scan_type.shift) & @@ -157,12 +157,12 @@ static int ad5686_write_raw(struct iio_dev *indio_dev, if (val > (1 << chan->scan_type.realbits) || val < 0) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = st->write(st, AD5686_CMD_WRITE_INPUT_N_UPDATE_N, chan->address, val << chan->scan_type.shift); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); break; default: ret = -EINVAL; @@ -468,6 +468,8 @@ int ad5686_probe(struct device *dev, indio_dev->channels = st->chip_info->channels; indio_dev->num_channels = st->chip_info->num_channels; + mutex_init(&st->lock); + switch (st->chip_info->regmap_type) { case AD5310_REGMAP: cmd = AD5686_CMD_CONTROL_REG; diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h index 70a779939ddb..52009b5eef88 100644 --- a/drivers/iio/dac/ad5686.h +++ b/drivers/iio/dac/ad5686.h @@ -117,6 +117,7 @@ struct ad5686_chip_info { * @pwr_down_mask: power down mask * @pwr_down_mode: current power down mode * @use_internal_vref: set to true if the internal reference voltage is used + * @lock lock to protect the data buffer during regmap ops * @data: spi transfer buffers */ @@ -130,6 +131,7 @@ struct ad5686_state { ad5686_write_func write; ad5686_read_func read; bool use_internal_vref; + struct mutex lock; /* * DMA (thus cache coherency maintenance) requires the |