Message-ID: <554A057D.3050007@free-electrons.com>
Date: Wed, 06 May 2015 14:13:49 +0200
From: Gregory CLEMENT <gregory.clement@free-electrons.com>
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To: Andrew <andrew@ncrmnt.org>
CC: Andrew Lunn <andrew@lunn.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        Russell King <linux@arm.linux.org.uk>,
        Linus Walleij <linus.walleij@linaro.org>,
        Wolfram Sang <wsa@the-dreams.de>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-gpio@vger.kernel.org, Jason Cooper <jason@lakedaemon.net>
Subject: Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink
  DNS-327L
References: <b6534b962d2cf9d21cb72d43f19a6574@mail.ncrmnt.org> <552A6209.9040903@gmail.com> <cd7445f789f1082f464d464f77807f12@mail.ncrmnt.org> <20150412145857.GA14038@lunn.ch> <b172d775afa24cea69a9490f531c6b37@mail.ncrmnt.org> <20150412194735.GA27921@lunn.ch> <552BCFAA.2020109@free-electrons.com> <1ec8906f00468ca5a9fa227f8c83fe69@mail.ncrmnt.org> <55351569.7000307@free-electrons.com> <d28764ea5d0d5f4c2e5d3e9ca1d7217a@mail.ncrmnt.org> <55351898.60604@free-electrons.com> <4e7e91562aac6a260885bf2d12174060@mail.ncrmnt.org>
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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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