queue-4.19/iio-ad_sigma_delta-select-channel-when-reading-register.patch

   1 From fccfb9ce70ed4ea7a145f77b86de62e38178517f Mon Sep 17 00:00:00 2001
   2 From: Dragos Bogdan <dragos.bogdan@analog.com>
   3 Date: Tue, 19 Mar 2019 12:47:00 +0200
   4 Subject: iio: ad_sigma_delta: select channel when reading register
   5
   6 From: Dragos Bogdan <dragos.bogdan@analog.com>
   7
   8 commit fccfb9ce70ed4ea7a145f77b86de62e38178517f upstream.
   9
  10 The desired channel has to be selected in order to correctly fill the
  11 buffer with the corresponding data.
  12 The `ad_sd_write_reg()` already does this, but for the
  13 `ad_sd_read_reg_raw()` this was omitted.
  14
  15 Fixes: af3008485ea03 ("iio:adc: Add common code for ADI Sigma Delta devices")
  16 Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
  17 Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
  18 Cc: <Stable@vger.kernel.org>
  19 Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  21
  22 ---
  23  drivers/iio/adc/ad_sigma_delta.c |    1 +
  24  1 file changed, 1 insertion(+)
  25
  26 --- a/drivers/iio/adc/ad_sigma_delta.c
  27 +++ b/drivers/iio/adc/ad_sigma_delta.c
  28 @@ -121,6 +121,7 @@ static int ad_sd_read_reg_raw(struct ad_
  29         if (sigma_delta->info->has_registers) {
  30                 data[0] = reg << sigma_delta->info->addr_shift;
  31                 data[0] |= sigma_delta->info->read_mask;
  32 +               data[0] |= sigma_delta->comm;
  33                 spi_message_add_tail(&t[0], &m);
  34         }
  35         spi_message_add_tail(&t[1], &m);