diff options
Diffstat (limited to 'drivers/staging/iio/meter/ade7753.c')
| -rw-r--r-- | drivers/staging/iio/meter/ade7753.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c index ce26abdeab92..c44eb577dc35 100644 --- a/drivers/staging/iio/meter/ade7753.c +++ b/drivers/staging/iio/meter/ade7753.c @@ -80,7 +80,7 @@ * @us: actual spi_device * @tx: transmit buffer * @rx: receive buffer - * @buf_lock: mutex to protect tx and rx + * @buf_lock: mutex to protect tx, rx and write frequency **/ struct ade7753_state { struct spi_device *us; @@ -107,6 +107,19 @@ static int ade7753_spi_write_reg_8(struct device *dev, return ret; } +static int __ade7753_spi_write_reg_16(struct device *dev, u8 reg_address, + u16 value) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ade7753_state *st = iio_priv(indio_dev); + + st->tx[0] = ADE7753_WRITE_REG(reg_address); + st->tx[1] = (value >> 8) & 0xFF; + st->tx[2] = value & 0xFF; + + return spi_write(st->us, st->tx, 3); +} + static int ade7753_spi_write_reg_16(struct device *dev, u8 reg_address, u16 value) { @@ -115,10 +128,7 @@ static int ade7753_spi_write_reg_16(struct device *dev, u8 reg_address, struct ade7753_state *st = iio_priv(indio_dev); mutex_lock(&st->buf_lock); - st->tx[0] = ADE7753_WRITE_REG(reg_address); - st->tx[1] = (value >> 8) & 0xFF; - st->tx[2] = value & 0xFF; - ret = spi_write(st->us, st->tx, 3); + ret = __ade7753_spi_write_reg_16(dev, reg_address, value); mutex_unlock(&st->buf_lock); return ret; @@ -483,7 +493,7 @@ static ssize_t ade7753_write_frequency(struct device *dev, if (!val) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->buf_lock); t = 27900 / val; if (t > 0) @@ -501,10 +511,10 @@ static ssize_t ade7753_write_frequency(struct device *dev, reg &= ~(3 << 11); reg |= t << 11; - ret = ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg); + ret = __ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg); out: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->buf_lock); return ret ? ret : len; } @@ -561,7 +571,6 @@ static const struct attribute_group ade7753_attribute_group = { static const struct iio_info ade7753_info = { .attrs = &ade7753_attribute_group, - .driver_module = THIS_MODULE, }; static int ade7753_probe(struct spi_device *spi) |