UART_OMAP_EFR2
serial_out(up, UART_OMAP_EFR2, UART_OMAP_EFR2_TIMEOUT_BEHAVE);
serial_out(up, UART_OMAP_EFR2, 0x0);
efr2 = serial_in(up, UART_OMAP_EFR2);
serial_out(up, UART_OMAP_EFR2, UART_OMAP_EFR2_TIMEOUT_BEHAVE);
serial_out(up, UART_OMAP_EFR2, efr2);
serial_out(up, UART_OMAP_EFR2, 0x0);