AML_UART_RX_EMPTY
} while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY));
if (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY))
if (readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY)