040000 tree 4678f8540ceaaebcd502eb4f8cb39511dc7f0d1d	fallback
040000 tree 7bc8b5709711664f2150e0d7c3267be572d8bc0a	intel-rtc
040000 tree 26eb30be2281884541531953083a3b6229f4249b	nxp
040000 tree 70dc9f6de6c06d72aeb75ec84f8ece4fbedd7cc2	pl031-rtc