linux-kernel - Re: [PATCH 4/6] ce4100: Add errata fixes for UART on CE4100

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Date:	Thu, 11 Nov 2010 13:06:39 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Dirk Brandewie <dirk.brandewie@...il.com>
cc:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 4/6] ce4100: Add errata fixes for UART on CE4100

On Thu, 11 Nov 2010, Dirk Brandewie wrote:

> On 11/11/2010 03:47 AM, Thomas Gleixner wrote:
> > On Thu, 11 Nov 2010, Dirk Brandewie wrote:
> > 
> > > On 11/11/2010 03:34 AM, Thomas Gleixner wrote:
> > > > 
> > > > 
> > > > > +	 * Over ride the legacy port configuration that comes from
> > > > > +	 * asm/serial.h. Using the ioport driver then switching to the
> > > > > +	 * PCI memmaped driver hangs the IOAPIC
> > > > > +	 */
> > > > > +	if (up->iotype !=  UPIO_MEM32) {
> > > > > +		up->uartclk  = 14745600;
> > > > > +		up->mapbase = 0xdffe0200;
> > > > 
> > > >     What does the uartclk, mapbase fixups in the CONFIG_EARLY_PRINTK=n
> > > > case ?
> > > > 
> > > This is setup in the PCI driver patch #3 in the series
> > 
> > I just can't find it there, that's why I'm asking :)
> The weird clock is dealt with in:
> +	[pbn_ce4100_1_115200] = {
> +		.flags		= FL_BASE0,
> +		.num_ports	= 1,
> +		.base_baud	= 921600,
> +		.reg_shift      = 2,
> +	},
> 
> That map base is setup in the generic pci driver in setup_port(). I didn't
> need to do anything special.

Thanks for the clarification.

       tglx
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