diff options
| author | Sergiu Cuciurean <sergiu.cuciurean@analog.com> | 2020-05-14 12:10:28 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-05-16 16:23:09 +0100 |
| commit | 19710bffe4bc00bb1640e32c0f6d0408cbf566f7 (patch) | |
| tree | a6543d8df08bf42c8bcb72b8472dde65a4c1a88e /drivers | |
| parent | a49e961c7c0aecd2cffaf686e2d91b510c0d8405 (diff) | |
| download | linux-19710bffe4bc00bb1640e32c0f6d0408cbf566f7.tar.bz2 | |
iio: dac: ad5761: 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')
| -rw-r--r-- | drivers/iio/dac/ad5761.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/iio/dac/ad5761.c b/drivers/iio/dac/ad5761.c index 4fb42b743f0f..67179944e5c5 100644 --- a/drivers/iio/dac/ad5761.c +++ b/drivers/iio/dac/ad5761.c @@ -57,11 +57,13 @@ enum ad5761_supported_device_ids { * @use_intref: true when the internal voltage reference is used * @vref: actual voltage reference in mVolts * @range: output range mode used + * @lock lock to protect the data buffer during SPI ops * @data: cache aligned spi buffer */ struct ad5761_state { struct spi_device *spi; struct regulator *vref_reg; + struct mutex lock; bool use_intref; int vref; @@ -124,9 +126,9 @@ static int ad5761_spi_write(struct iio_dev *indio_dev, u8 addr, u16 val) struct ad5761_state *st = iio_priv(indio_dev); int ret; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = _ad5761_spi_write(st, addr, val); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; } @@ -163,9 +165,9 @@ static int ad5761_spi_read(struct iio_dev *indio_dev, u8 addr, u16 *val) struct ad5761_state *st = iio_priv(indio_dev); int ret; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = _ad5761_spi_read(st, addr, val); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; } @@ -368,6 +370,8 @@ static int ad5761_probe(struct spi_device *spi) if (pdata) voltage_range = pdata->voltage_range; + mutex_init(&st->lock); + ret = ad5761_spi_set_range(st, voltage_range); if (ret) goto disable_regulator_err; |