linux-kernel - Re: [PATCH v9 07/17] clk: tegra: Add Tegra124 DFLL clocksource platform driver

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Message-ID: <CAMAWPa8PQgNWbajvrxMiD4qcUBg+Q1xsOU5hhhFQbxE4VxW_uQ@mail.gmail.com>
Date:	Tue, 26 May 2015 11:17:22 -0700
From:	Kevin Hilman <khilman@...nel.org>
To:	Mikko Perttunen <mikko.perttunen@...si.fi>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	Peter De Sc hrijver <pdeschrijver@...dia.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Mike Turquette <mturquette@...aro.org>, pwalmsley@...dia.com,
	Vince Hsu <vinceh@...dia.com>, pgaikwad@...dia.com,
	lkml <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	linux-tegra@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, tuomas.tynkkynen@....fi,
	Tuomas Tynkkynen <ttynkkynen@...dia.com>,
	Olof Johansson <olof@...om.net>,
	Tyler Baker <tyler.baker@...aro.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v9 07/17] clk: tegra: Add Tegra124 DFLL clocksource
 platform driver

On Wed, May 13, 2015 at 7:58 AM, Mikko Perttunen
<mikko.perttunen@...si.fi> wrote:
> From: Tuomas Tynkkynen <ttynkkynen@...dia.com>
>
> Add basic platform driver support for the fast CPU cluster DFLL
> clocksource found on Tegra124 SoCs. This small driver selects the
> appropriate Tegra124-specific characterization data and integration
> code. It relies on the DFLL common code to do most of the work.
>
> Signed-off-by: Tuomas Tynkkynen <ttynkkynen@...dia.com>
> Signed-off-by: Mikko Perttunen <mikko.perttunen@...si.fi>
> Acked-by: Michael Turquette <mturquette@...aro.org>

Various boot failures on non-tegra platforms (sunxi, omap) started
showing up in next-20150522, and still exist in next-20150525[1] and
today I bisected them down to this patch.

I didn't look closely, but I"m guessing the module_init() function
here needs some compatible checking so it's not actually executed on
non-tegra platforms.

I confirmed that reverting this patch on top of next-20150525 gets
both the sunxi and omap platforms booting again.

Kevin

[1] http://kernelci.org/boot/all/job/next/kernel/next-20150525/
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