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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