linux-kernel - Re: Simple UART driver help and TTY questions

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Date:	Wed, 06 Aug 2008 23:51:43 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Ira Snyder <iws@...o.caltech.edu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Simple UART driver help and TTY questions

On 08/06/2008 11:46 PM, Ira Snyder wrote:
> On Wed, Aug 06, 2008 at 11:11:00PM +0200, Jiri Slaby wrote:
>> conOn 08/05/2008 06:33 PM, Ira Snyder wrote:
>>> static void tiny_config_port(struct uart_port *port, int flags)
>>> {
>>> 	FUNC_ENTER();
>>         if (flags & UART_CONFIG_TYPE)
>>                 port->type = PORT_16550A;
>>
>>> }
>> According to the straces, you get -EIO from ioctl and read which most 
>> likely means TTY_IO_ERROR bit set due to tiny_port->type = PORT_UNKNOWN 
>> (i.e. 0). Try the above.
> 
> Not quite, but it got me on the right track. I needed to set port->type
> before calling uart_add_one_port().

Ah,
.flags          = ASYNC_BOOT_AUTOCONF
I guess?

+ I'm sure you will need to set up more entries of your uart_port structure.
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