linux-kernel - Re: [PATCH] clk: tegra: Fix clock sources for tegra210 EMC

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Date:	Wed, 13 Jan 2016 18:20:40 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Rhyland Klein <rklein@...dia.com>, linux-clk@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: tegra: Fix clock sources for tegra210 EMC

On Fri, Dec 18, 2015 at 01:45:28PM +0000, Jon Hunter wrote:
> The EMC clock sources for tegra210 currently incorrectly include pll_c2
> and pll_c3. However, both of these should have been pll_mb as shown in
> the TRM. If tegra210 happens to be configured such that the pll_mb is the
> default clock for the EMC, as configured by the bootloader, then this will
> cause a system hang on boot. This is because the kernel will disable the
> pll_mb when disabling unused clock as it appears to be unused when it is
> not.
> 
> Also add the additional pll_p clock source for the EMC.
> 
> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> ---
>  drivers/clk/tegra/clk-tegra210.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Applied, thanks.

Thierry

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