linux-kernel - Re: [PATCH 0/4] pch_uart: Cleanups, board quirks, and user uartclk parameter

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Message-ID: <4F44AE57.10302@linux.intel.com>
Date:	Wed, 22 Feb 2012 00:59:03 -0800
From:	Darren Hart <dvhart@...ux.intel.com>
To:	Tomoya MORINAGA <tomoya.rohm@...il.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Feng Tang <feng.tang@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org
Subject: Re: [PATCH 0/4] pch_uart: Cleanups, board quirks, and user uartclk
 parameter



On 02/22/2012 12:16 AM, Tomoya MORINAGA wrote:
> 2012年2月22日15:39 Darren Hart <dvhart@...ux.intel.com>:
>> We can add a patch to this series that sets the
>> default to 192MHz, drops the CM-iTC quirk, and does nothing in pch_phub
>> probe for the FRI2.
> 
> If you set  the clock of pch_uart as 64MHz,
> do you need to add quirk for FRI2 to pch_phub so as to provide 64MHz clock?

I admit the value of pch_phub eludes me a bit. In my case, the firmware
sets up the CLKCFG register, so there is no need to set it manually
after boot. Instead, I'm making sure the pch_uart driver defaults to
what the firmware sets up.

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel
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