linux-kernel - Re: [PATCH v2] ARM: dts: sunxi: Add regulators for LeMaker BananaPi

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Date:	Thu, 24 Sep 2015 10:57:11 -0700
From:	Kevin Hilman <khilman@...nel.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Timo Sigurdsson <public_timo.s@...entcreek.de>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-sunxi@...glegroups.com, Chen-Yu Tsai <wens@...e.org>,
	Tyler Baker <tyler.baker@...aro.org>,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v2] ARM: dts: sunxi: Add regulators for LeMaker BananaPi

On Tue, Aug 18, 2015 at 8:36 AM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> On Sun, Aug 02, 2015 at 06:18:25PM +0200, Timo Sigurdsson wrote:
>> sun7i-a20-bananapi.dts doesn't contain regulator nodes for the AXP209 PMU
>> driver, so add them to allow for voltage-scaling with cpufreq-dt.
>>
>> Signed-off-by: Timo Sigurdsson <public_timo.s@...entcreek.de>
>
> Queued, thanks!
> Maxime

kernelci.org started finding boot faiulres[1] on bananapi linux-next
around next-20150918, but it was only failing in some labs and not
others.  I finally bisected it down to this patch, which landed in
linux-next in the form of 2d665a8a8350 ARM: dts: sunxi: Add regulators
for LeMaker BananaPi.  Reverting that commit on top of next-20150923
gets my bananapi booting again.

Note it's kind of an interesting boot failure.  The kernel boots fully
to a shell, but panics after running a few commands.  In particular
'dmesg -n1' seems to trigger it usually[2].

Kevin

[1] http://kernelci.org/boot/sun7i-a20-bananapi/job/next/kernel/next-20150923/defconfig/multi_v7_defconfig/lab/lab-khilman/?_id=5602504359b514be146c326f
[2] http://storage.kernelci.org/next/next-20150923/arm-multi_v7_defconfig/lab-khilman/boot-sun7i-a20-bananapi.html
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