The driver can match only via the DT table so the table should be always used and the of_match_ptr does not have any sense (this also allows ACPI matching via PRP0001, even though it might not be relevant here). drivers/gpio/gpio-sama5d2-piobu.c:230:34: error: ‘sama5d2_piobu_ids’ defined but not used [-Werror=unused-const-variable=] Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- drivers/gpio/gpio-sama5d2-piobu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-sama5d2-piobu.c b/drivers/gpio/gpio-sama5d2-piobu.c index 3e95da717fc9..767c33ae3213 100644 --- a/drivers/gpio/gpio-sama5d2-piobu.c +++ b/drivers/gpio/gpio-sama5d2-piobu.c @@ -236,7 +236,7 @@ MODULE_DEVICE_TABLE(of, sama5d2_piobu_ids); static struct platform_driver sama5d2_piobu_driver = { .driver = { .name = "sama5d2-piobu", - .of_match_table = of_match_ptr(sama5d2_piobu_ids) + .of_match_table = sama5d2_piobu_ids, }, .probe = sama5d2_piobu_probe, }; -- 2.34.1