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-visconti.c:187:34: error: ‘visconti_gpio_of_match’ defined but not used [-Werror=unused-const-variable=] Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- drivers/gpio/gpio-visconti.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-visconti.c b/drivers/gpio/gpio-visconti.c index 5e108ba9956a..10d9de41f29b 100644 --- a/drivers/gpio/gpio-visconti.c +++ b/drivers/gpio/gpio-visconti.c @@ -194,7 +194,7 @@ static struct platform_driver visconti_gpio_driver = { .probe = visconti_gpio_probe, .driver = { .name = "visconti_gpio", - .of_match_table = of_match_ptr(visconti_gpio_of_match), + .of_match_table = visconti_gpio_of_match, } }; module_platform_driver(visconti_gpio_driver); -- 2.34.1