AR933X_UART_INT_REG
ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_RX_VALID);
status = ar933x_uart_read(up, AR933X_UART_INT_REG);
ar933x_uart_write(up, AR933X_UART_INT_REG,
ar933x_uart_write(up, AR933X_UART_INT_REG,
ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_ALLINTS);