linux-kernel - Re: [PATCHv3 2/2] serial: Add driver for the Altera UART

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Date:	Wed, 24 Mar 2010 07:05:27 -0400
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Tobias Klauser <tklauser@...tanz.ch>
Cc:	linux-serial@...r.kernel.org, gregkh@...e.de,
	nios2-dev@...c.et.ntust.edu.tw, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCHv3 2/2] serial: Add driver for the Altera UART

On Wed, 24 Mar 2010 07:47:47 +0100 Tobias Klauser <tklauser@...tanz.ch> wrote:

> On 2010-03-23 at 22:54:59 +0100, Andrew Morton <akpm@...ux-foundation.org> wrote:
> > On Fri,  5 Mar 2010 17:52:23 +0100
> > Tobias Klauser <tklauser@...tanz.ch> wrote:
> > 
> > > +	sigs |= (altera_uart_getppdcd(port->line) ? TIOCM_CD : 0);
> > > +	sigs |= (altera_uart_getppdtr(port->line) ? TIOCM_DTR : 0);
> > 
> > We seem to be missing a few things here.
> > 
> > drivers/serial/altera_uart.c: In function 'altera_uart_get_mctrl':
> > drivers/serial/altera_uart.c:100: error: implicit declaration of function 'altera_uart_getppdcd'
> > drivers/serial/altera_uart.c:101: error: implicit declaration of function 'altera_uart_getppdtr'
> > drivers/serial/altera_uart.c: In function 'altera_uart_set_mctrl':
> > drivers/serial/altera_uart.c:114: error: implicit declaration of function 'altera_uart_setppdtr'
> 
> These should usually be declared in a board specific header. There were
> compatibility macros in altera_uart.c which defined them to NOPs in case
> the board header did not properly define them. But I remove them as per
> request by Alan Cox (Message-ID: 20100301181920.3952c3e7@...rguk.ukuu.org.uk).
> 
> Should we add them again (maybe to altera_uart.h)? Or would it be better
> to define a config symbol which is set in the board specific Kconfig and
> altera_uart depends on it?

I guess the latter.

There should have been a real implementation of these in the patchset -
otherwise the code can't be used or tested.  Confused.

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