18c2ecf20Sopenharmony_ciAltera UART 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ciRequired properties: 48c2ecf20Sopenharmony_ci- compatible : should be "ALTR,uart-1.0" <DEPRECATED> 58c2ecf20Sopenharmony_ci- compatible : should be "altr,uart-1.0" 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ciOptional properties: 88c2ecf20Sopenharmony_ci- clock-frequency : frequency of the clock input to the UART 9