iio: adc: stm32-dfsdm: fix st,adc-alt-channel property handling

commit 8a6b7989ff0cd0a95c93be1927f2af7ad10f28de upstream.

Initially st,adc-alt-channel property was defined as an enum in the DFSDM
binding. The DFSDM binding has been changed to use the new IIO backend
framework, along with the adoption of IIO generic channels.
In this new binding st,adc-alt-channel is defined as a boolean property,
but it is still handled has an enum in DFSDM driver.
Fix st,adc-alt-channel property handling in DFSDM driver.

Fixes: 3208fa0cd919 ("iio: adc: stm32-dfsdm: adopt generic channels bindings")
Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 2037f73426d4b3420072ad578548a4eb20611204..5db7f509ad57075371072b372fdf0e4dfb49e885 100644 (file)
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -721,9 +721,8 @@ static int stm32_dfsdm_generic_channel_parse_of(struct stm32_dfsdm *dfsdm,
        }
        df_ch->src = val;
 
-       ret = fwnode_property_read_u32(node, "st,adc-alt-channel", &df_ch->alt_si);
-       if (ret != -EINVAL)
-               df_ch->alt_si = 0;
+       if (fwnode_property_present(node, "st,adc-alt-channel"))
+               df_ch->alt_si = 1;
 
        if (adc->dev_data->type == DFSDM_IIO) {
                backend = devm_iio_backend_fwnode_get(&indio_dev->dev, NULL, node);