linux-kernel - Re: [PATCH] clk: si5351: Add gapless tuning for SI5351 PLL

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Message-ID: <2031033.gNGydvIeAk@ganymedes>
Date:	Tue, 09 Apr 2013 15:49:37 +0200
From:	Michal Bachraty <michal.bachraty@...eamunlimited.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	rob@...dley.net, mturquette@...aro.org,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: si5351: Add gapless tuning for SI5351 PLL

Hi Sebastian,

> does gapless tuning have any constraints? Can we use it for all rate
> changes or determine the
> need for pll reset by rate offset?

Today I made some test measurements ( switching from 22.5MHz to 32kHz, then to 
50MHz, then to 1MHz) with good results: without any gaps and any side 
frequences.  So there are no constrains, and we can use it for any frequences. 

Best,
Michal

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