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iio: adc: stm32-dfsdm: handle label as an optional property

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The label property is defined as optional in the DFSDM binding.
Parse the label property only when it is defined in the device tree.

Fixes: 3208fa0cd9 ("iio: adc: stm32-dfsdm: adopt generic channels bindings")
Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20241114102459.2497178-1-olivier.moysan@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Olivier Moysan 2024-11-14 11:24:59 +01:00 committed by Jonathan Cameron
parent dddfd0c489
commit ad8479ac08
1 changed files with 8 additions and 5 deletions
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13
drivers/iio/adc/stm32-dfsdm-adc.c
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@ -691,11 +691,14 @@ static int stm32_dfsdm_generic_channel_parse_of(struct stm32_dfsdm *dfsdm,
return -EINVAL; return -EINVAL;
} }
ret = fwnode_property_read_string(node, "label", &ch->datasheet_name); if (fwnode_property_present(node, "label")) {
if (ret < 0) { /* label is optional */
dev_err(&indio_dev->dev, ret = fwnode_property_read_string(node, "label", &ch->datasheet_name);
" Error parsing 'label' for idx %d\n", ch->channel); if (ret < 0) {
return ret; dev_err(&indio_dev->dev,
" Error parsing 'label' for idx %d\n", ch->channel);
return ret;
}
} }
df_ch = &dfsdm->ch_list[ch->channel]; df_ch = &dfsdm->ch_list[ch->channel];