From: Darren Hart <dvhart@linux.intel.com>
To: Feng Tang <feng.tang@intel.com>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>,
Alan Cox <alan@linux.intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-serial@vger.kernel.org
Subject: Re: [PATCH 0/4 V2] pch_uart: Cleanups, board quirks, and user uartclk parameter
Date: Thu, 01 Mar 2012 11:29:28 -0800 [thread overview]
Message-ID: <4F4FCE18.4050400@linux.intel.com> (raw)
In-Reply-To: <20120301024028.GA6612@feng-i7>
On 02/29/2012 06:40 PM, Feng Tang wrote:
> On Wed, Feb 29, 2012 at 05:12:08PM -0800, Darren Hart wrote:
>>
>>
>> On 02/29/2012 05:06 PM, Tomoya MORINAGA wrote:
>>> 2012年3月1日9:47 Darren Hart <dvhart@linux.intel.com>:
>>>> how do we force the
>>>> 192MHz clock setting BEFORE the pch_phub code runs?
>>>
>>> To realize your requirement,
>>> I think that set by BIOS is only way.
>>
>> Perhaps a pch_phub.bios_uartclk parameter could be used for setting up
>> the initial console and once the phub driver is loaded, it can make the
>> necessary changes and fix things up in the uart port? This would add a
>> binding between the pch_uart and pch_phub code.
>>
>> Thoughts?
>
> To satisfy the early console, one way may be add a x86_init_ops for all
> Tunnel Creek compatible platform like what Moorestown/Medfield have done,
> and insert the uart clk setting work into one of the early init function.
>
I believe this is inline with what Alan was recommending in his response
to the V1 patch series, and it sounds like a reasonable next step.
--
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel
prev parent reply other threads:[~2012-03-01 19:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-29 18:24 [PATCH 0/4 V2] pch_uart: Cleanups, board quirks, and user uartclk parameter Darren Hart
2012-02-29 18:24 ` [PATCH 1/4] pch_uart: Use uartclk instead of base_baud Darren Hart
2012-03-08 18:58 ` Greg Kroah-Hartman
2012-02-29 18:24 ` [PATCH 2/4] pch_uart: Add Fish River Island II uart clock quirks Darren Hart
2012-02-29 18:24 ` [PATCH 3/4] pch_uart: Add user_uartclk parameter Darren Hart
2012-03-08 18:56 ` Greg Kroah-Hartman
2012-03-08 21:10 ` Darren Hart
2012-02-29 18:24 ` [PATCH 4/4] pch_uart: Use existing default_baud in setup_console Darren Hart
2012-03-01 0:38 ` [PATCH 0/4 V2] pch_uart: Cleanups, board quirks, and user uartclk parameter Tomoya MORINAGA
2012-03-01 0:47 ` Darren Hart
2012-03-01 0:53 ` Greg Kroah-Hartman
2012-03-07 18:32 ` Darren Hart
2012-03-07 18:39 ` Greg Kroah-Hartman
2012-03-01 1:06 ` Tomoya MORINAGA
2012-03-01 1:12 ` Darren Hart
2012-03-01 2:06 ` Tomoya MORINAGA
2012-03-01 2:07 ` Darren Hart
2012-03-01 2:27 ` Tomoya MORINAGA
2012-03-01 2:40 ` Feng Tang
2012-03-01 2:40 ` Feng Tang
2012-03-01 19:29 ` Darren Hart [this message]
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