The driver can be compile tested with !CONFIG_OF making certain data unused (of_device_id is not used for device matching): drivers/iio/dac/ad5755.c:865:34: error: ‘ad5755_of_match’ defined but not used [-Werror=unused-const-variable=] Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- Changes since v1: 1. None. Although Jonathan expressed need of changes here, they are a bit too invasive for me thus I am resending it only for completeness. I understand therefore that patch might not be accepted. --- drivers/iio/dac/ad5755.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c index beadfa938d2d..a6dc8a0bfc29 100644 --- a/drivers/iio/dac/ad5755.c +++ b/drivers/iio/dac/ad5755.c @@ -862,7 +862,7 @@ static const struct spi_device_id ad5755_id[] = { }; MODULE_DEVICE_TABLE(spi, ad5755_id); -static const struct of_device_id ad5755_of_match[] = { +static const struct of_device_id ad5755_of_match[] __maybe_unused = { { .compatible = "adi,ad5755" }, { .compatible = "adi,ad5755-1" }, { .compatible = "adi,ad5757" }, -- 2.34.1