linux-kernel - Re: [PATCH 0/8] Armada XP pinctrl consolidation and ix4-300d fixes

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Message-Id: <B4E62BBB-856D-48E9-B694-C6149DB0E864@perenite.com>
Date:	Wed, 15 Oct 2014 17:35:13 +0200
From:	Benoit Masson <benoitm@...enite.com>
To:	Andrew Lunn <andrew@...n.ch>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Jason Cooper <jason@...edaemon.net>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Benoit Masson <yahoo@...enite.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/8] Armada XP pinctrl consolidation and ix4-300d fixes


Le 15 oct. 2014 à 16:41, Andrew Lunn <andrew@...n.ch> a écrit :

>>> All the 3 branch works WHEN APPLYING A0 patch (below), with both my custom kernel config and the arch/arm/configs/mvebu_v7_defconfig
>> Just one thing though, one of my cron behavior change with 3.17, when I use the cmd  "/sbin/hwclock --adjust -f /dev/rtc1" I get this new error I never had before:
>> "hwclock: select() to /dev/rtc1 to wait for clock tick timed out: Success"
>> 
>> where rtc1 if the i2c rtc connected to the i2C bus, can this be related to the i2c patch that would slow down i2c operation or somthing ? 
> 
> Hi Benoit
> 
> It won't fix your problem, but if the built in RTC is not usable, it
> would be good to disable it in the .dts file. The i2c RTC will then
> become RTC0.
> 
> 
> The actual "error" message is odd:
> "hwclock: select() to /dev/rtc1 to wait for clock tick timed out: Success"
> 
Yes this is the wired thing is that everything works, even getting the date via "cat /sys/class/i2c-adapter/i2c-0/0-0051/rtc/rtc1/time" is ok
reading the rtc driver code it seems this message is shown when multiple resources try to access shared rtc... but why now and not before ?

So I was wondering if the i2c_quirk() applied by the batch has any effect with this ?

Anyhow I'll handle the message for now and see if there are performance impact on this...

Benoit

> Success means it actually worked, not an error. Does the RTC contain
> the correct time afterwards?
> 
>    Andrew

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