linux-kernel - Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink DNS-327L

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Message-ID: <554A057D.3050007@free-electrons.com>
Date:	Wed, 06 May 2015 14:13:49 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Andrew <andrew@...mnt.org>
CC:	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	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 <linux@....linux.org.uk>,
	Linus Walleij <linus.walleij@...aro.org>,
	Wolfram Sang <wsa@...-dreams.de>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org, Jason Cooper <jason@...edaemon.net>
Subject: Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink
  DNS-327L

Hi Andrew,


> 
> Sorry for the long delay with testing, but here come the results.
> I've rebased everything to 4.1-rc1
> 
> 1. WFI + DeepIdle => freeze after approx:
>    * 1 hours and 30 minutes, first test
>    * 3 hours and 40 minutes, second test
> 2. WFI only (DeepIdle disabled via sysfs) => Still alive after 13 hours 
> and counting

Thanks for testing it. So, to sum-up, WFI+DeepIdle makes the board freeze
after a few hours in 4.1-rc1 and 4.0 for sure. Are you aware of any version
that did not freeze? It would help to know if it was a regression or not.

Andrew Lunn did not report any issue on his 370RD however I will test
it also on an other Armada 370 base board (a Mirabox) using the .config
you already sent.

But what I expect is either a hardware issue, or a hardware configuration
issue in U-Boot. We still rely a lot on the bootloader and I fear that
we have some implicit assumptions.

By the way do you have access on the bootloader sources or at least could
you give us the U-boot version used?

Thanks,

Gregory



> 
> The proper patchset will follow as soon as I figure out what change 
> broke
> dns320l-daemon (The utility that speaks to weltrend mcu on ttyS1)
> It was working on 3.18.6, on 3.19 and up - it writes data to the port 
> (and mcu acks it),
> but can't read any responses.
> 
> Same thing happens to the python (pyserial inside) implementation of the 
> fan-daemon:
> https://github.com/martignlo/DNS-320L
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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