UART_OMAP_MDR1_DISABLE
UART_OMAP_MDR1_DISABLE); /* disable UART */
serial_omap_mdr1_errataset(up, UART_OMAP_MDR1_DISABLE);
serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE);
up->mdr1 = UART_OMAP_MDR1_DISABLE;