From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Subject: Re: [PATCH 1/2] clk: tegra: remove USB from clk init table
Date: Mon, 28 Jan 2013 11:37:55 -0700
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To: Prashant Gaikwad <pgaikwad-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>, Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>, Venu Byravarasu <vbyravarasu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Lucas Stach <dev-8ppwABl0HbeELgA04lAiVw@public.gmane.org>, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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On 01/27/2013 03:17 PM, Lucas Stach wrote:
> The USB clocks are just clock gates, so no need to set a specific clock.
> In fact trying to set a specific clock is just a NOP if the requested
> clockrate is the same as those of the parent (clk_m) or will trigger a
> WARN_ON() if rates don't match up.
> 
> As we are not setting a specific rate, nor activating the clocks at
> init, there is no point in keeping the the usb entries in the clock init
> table.

I'm not convinced here; aren't the USB clocks supposed to be driven by
PLL U?

Prashant, Peter, Venu, can you please comment here.