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iio: ad_sigma_delta: select channel when reading register

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The desired channel has to be selected in order to correctly fill the
buffer with the corresponding data.
The `ad_sd_write_reg()` already does this, but for the
`ad_sd_read_reg_raw()` this was omitted.

Fixes: af3008485ea03 ("iio:adc: Add common code for ADI Sigma Delta devices")
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Dragos Bogdan 2019-03-19 12:47:00 +02:00 committed by Jonathan Cameron
parent f6a7bf2ccf
commit fccfb9ce70
1 changed files with 1 additions and 0 deletions
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drivers/iio/adc/ad_sigma_delta.c
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@ -121,6 +121,7 @@ static int ad_sd_read_reg_raw(struct ad_sigma_delta *sigma_delta,
if (sigma_delta->info->has_registers) { if (sigma_delta->info->has_registers) {
data[0] = reg << sigma_delta->info->addr_shift; data[0] = reg << sigma_delta->info->addr_shift;
data[0] |= sigma_delta->info->read_mask; data[0] |= sigma_delta->info->read_mask;
data[0] |= sigma_delta->comm;
spi_message_add_tail(&t[0], &m); spi_message_add_tail(&t[0], &m);
} }
spi_message_add_tail(&t[1], &m); spi_message_add_tail(&t[1], &m);