* @spi: spi_device
* @chip_info: chip info
* @vref_reg: vref supply regulators
+ * @lock lock to protect the data buffer during SPI ops
* @data: spi transfer buffers
*/
struct spi_device *spi;
const struct ad5764_chip_info *chip_info;
struct regulator_bulk_data vref_reg[2];
+ struct mutex lock;
/*
* DMA (thus cache coherency maintenance) requires the
struct ad5764_state *st = iio_priv(indio_dev);
int ret;
- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->lock);
st->data[0].d32 = cpu_to_be32((reg << 16) | val);
ret = spi_write(st->spi, &st->data[0].d8[1], 3);
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);
return ret;
}
},
};
- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->lock);
st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16));
if (ret >= 0)
*val = be32_to_cpu(st->data[1].d32) & 0xffff;
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);
return ret;
}
indio_dev->num_channels = AD5764_NUM_CHANNELS;
indio_dev->channels = st->chip_info->channels;
+ mutex_init(&st->lock);
+
if (st->chip_info->int_vref == 0) {
st->vref_reg[0].supply = "vrefAB";
st->vref_reg[1].supply = "vrefCD";