COM_REG_TCR
[COM_REG_TCR] = AUCOM_FIFO,
[COM_REG_TCR] = RA_UART_FCR,
CSR_WRITE_1(regsp, COM_REG_TCR, tcr_value);
[COM_REG_TCR] = com_fifo,
CSR_WRITE_1(regsp, COM_REG_TCR, tcr_value);