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

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Date:	Thu, 11 Nov 2010 04:10:50 -0800
From:	Dirk Brandewie <dirk.brandewie@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	linux-kernel@...r.kernel.org, x86@...nel.org,
	dirk.brandewie@...il.com
Subject: Re: [PATCH 4/6] ce4100: Add errata fixes for UART on CE4100

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.
--Dirk
>
> Thanks,
>
> 	tglx

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