Re: Hardware flowcontrol on XR17D154

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

> 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.

Try it and see. We can put it in -next for a while and then there will a
release cycle duriing which any unfortunate clashes wil get resolved.

Alternatively if it's a device attached to a specific platform create it
as a platform device of some kind in the board specific code and pick
that up in the serial driver.

> 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.

The trouble is an extra register may in fact be part of some other device
- it's generally not a great idea if there are other choices.

Alan