Tirsdag den 30. august 2011 12:34:33 skrev Alan Cox:

Can you explain what the underlying differences are first of all ?

The EFR register is as you wrote adjusted differently.

If you just need to adjust a register differently then override
serial_in/serial_out methods and figure out how to detect your device
against others (or a way to probe it somehow).

I'm a bit in doubt as to which conclusions I am allowed to draw.

In 'autoconfig_16550a' I can see that a sepcific port type is set;

	if (status1 == 6 && status2 == 7) {
		up->port.type = PORT_16750;
		up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP;
		return;
	}

My particular uart resports (status1 == 6 && status2 == 6). If that is good 
enough I can add another porttype and add the correct register address as 
UART_EXAR_EFR in the header file.

Another thought could be to write 0xFF (or some other value) to the correct 
EFR-register and read that byte to test if the register is present. The 
problem here is that I do not how the bus reacts to writting/reading invalid 
addresses.

-- 
Søren Holm
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