Question about IO/MMIO check in uart_configure_port() in serial_core.c

Martin Qiu <martin_sjtu@xxxxxxxxxxxx> · Sun, 22 Mar 2009 11:01:41 +0800 (CST)

In uart_configure_port(), there is code:
        /*
         * If there isn't a port here, don't do anything further.
         */
        if (!port->iobase && !port->mapbase && !port->membase)
                return;

Actually, there is some UART devices over SPI interface, which don't have IO spcae or MMIO registers which could be directly accessed, like Maxim's 3100/3110/3111E. Further on, there may be UART devices over I2C.

These check may block those device from been correctly configured in linux, or they have to fake out a iobase or mapbase.. to pass this check, so my question is can these check re removed?

Thanks,
Martin

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