linux-kernel - Re: [PATCH v2 02/21] ARM: tegra: clock: Don't BUG on changing an enabled PLL

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Message-ID: <AANLkTim_y3cjWjHua0wc9pMvBNPMQNyamOyKgL92i3Vs@mail.gmail.com>
Date:	Sun, 20 Feb 2011 22:46:51 -0800
From:	Colin Cross <ccross@...roid.com>
To:	Olof Johansson <olof@...om.net>
Cc:	linux-tegra@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	konkers@...roid.com, Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/21] ARM: tegra: clock: Don't BUG on changing an
 enabled PLL

On Sun, Feb 20, 2011 at 8:06 PM, Olof Johansson <olof@...om.net> wrote:
> On Sat, Feb 19, 2011 at 2:25 PM, Colin Cross <ccross@...roid.com> wrote:
>> Signed-off-by: Colin Cross <ccross@...roid.com>
>
> Please add a 1-line description of why bugging doesn't make sense.
>
> Patch itself:
>
> Acked-by: Olof Johansson <olof@...om.net>
>

I will add:
When updating the CPU PLL frequency, keeping the PLL enabled avoids
ramping the PLL all the way down and back up again.  Remove the BUG_ON
in tegra2_pll_clk_set_rate to allow the rate to change while the PLL
is enabled.
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