linux-kernel - Re: [PATCH 1/2] ARM: dts: berlin2q: add the Marvell Armada 1500 pro (BG2Q) device tree

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Date:	Thu, 13 Mar 2014 10:17:04 +0000
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>, zmxu@...vell.com,
	jszhang@...vell.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] ARM: dts: berlin2q: add the Marvell Armada 1500 pro
 (BG2Q) device tree

On 03/13/2014 10:08 AM, Alexandre Belloni wrote:
> On 13/03/2014 at 09:56:48 +0000, Sebastian Hesselbarth wrote :
>> On 03/12/2014 12:22 PM, Alexandre Belloni wrote:
>>>
>>> The 25MHz crystal is on the board, please move it to the board dts.
>>
>> If you can confirm that sysmgr clock comes directly from this crystal,
>> I agree. If it is fed into a pll and can possibly be modified or gated,
>> make it depend on a 25MHz board crystal. If 25MHz is the only option
>> for this clock input, I could also live with it being part of the SoC
>> description.
>>
>
> Yeah, after more discussion, the 25 MHz crystl is the only option and it
> is fed to an oscillator that generate the reference clock for the PLLs.
> It is probably fine to let it in the dtsi.
>

Fine, I am planing to do more work on Berlin and especially clocks next
cycle. So most of the fixed-clocks will vanish anyway.

BTW, back at ELCE/ARM summit I successfully enabled SMP for berlin2.
I'll dig that patch out for you to re-test on Quad-core bg2q.

Sebastian
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