On 24/06/2023 02:41, Marijn Suijten wrote: > SM6125 is identical to SM6375 except that while downstream also defines > a throttle clock, its presence results in timeouts whereas SM6375 > requires it to not observe any timeouts. Then it should not be allowed, so you need either "else:" block or another "if: properties: compatible:" to disallow it. Because in current patch it would be allowed. Best regards, Krzysztof