From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Sergei Shtylyov
<sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
Cc: Ben Dooks <ben.dooks-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>,
linux-kernel-81qHHgoATdFT9dQujB1mzip2UmYkHbXO@public.gmane.org,
Simon Horman
<horms+renesas-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 3/6] i2c: rcar: do not print error if device nacks transfer
Date: Fri, 9 May 2014 07:04:46 +0200 [thread overview]
Message-ID: <20140509050446.GA2624@katana> (raw)
In-Reply-To: <536BFF39.40607-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
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> >- if (ret < 0)
> >+ if (ret < 0 && ret != -EREMOTEIO)
> > dev_err(dev, "error %d : %x\n", ret, priv->flags);
>
> Hm, I'm now getting -EBUSY and -EAGAIN running i2cdetect on
> R8A7791 base Henninger board. Only when I comment out the above 2
> lines, I can get the bus scanned, otherwise I don't see any devices
> at all.
Huh, this is only a printout? Do you get those errors as well if you
remove the printout and add a delay at that place?
And -EAGAIN? This is arbitration lost. Do you have another I2C master on
the bus?
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Sergei Shtylyov
<sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
Cc: Ben Dooks <ben.dooks-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>,
linux-kernel-81qHHgoATdFT9dQujB1mzip2UmYkHbXO@public.gmane.org,
Simon Horman
<horms+renesas-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 3/6] i2c: rcar: do not print error if device nacks transfer
Date: Fri, 09 May 2014 05:04:46 +0000 [thread overview]
Message-ID: <20140509050446.GA2624@katana> (raw)
In-Reply-To: <536BFF39.40607-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 553 bytes --]
> >- if (ret < 0)
> >+ if (ret < 0 && ret != -EREMOTEIO)
> > dev_err(dev, "error %d : %x\n", ret, priv->flags);
>
> Hm, I'm now getting -EBUSY and -EAGAIN running i2cdetect on
> R8A7791 base Henninger board. Only when I comment out the above 2
> lines, I can get the bus scanned, otherwise I don't see any devices
> at all.
Huh, this is only a printout? Do you get those errors as well if you
remove the printout and add a delay at that place?
And -EAGAIN? This is arbitration lost. Do you have another I2C master on
the bus?
[-- Attachment #2: Digital signature --]
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next prev parent reply other threads:[~2014-05-09 5:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1390752337-22386-1-git-send-email-ben.dooks@codethink.co.uk>
2014-01-26 16:05 ` [PATCH 4/6] i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted Ben Dooks
[not found] ` <1390752337-22386-1-git-send-email-ben.dooks-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>
2014-01-26 16:05 ` [PATCH 3/6] i2c: rcar: do not print error if device nacks transfer Ben Dooks
2014-01-26 16:05 ` Ben Dooks
[not found] ` <1390752337-22386-4-git-send-email-ben.dooks-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>
2014-01-26 21:50 ` Wolfram Sang
2014-01-26 21:50 ` Wolfram Sang
2014-02-16 9:46 ` Wolfram Sang
2014-02-16 9:46 ` Wolfram Sang
2014-02-16 10:25 ` Geert Uytterhoeven
2014-02-16 10:25 ` Geert Uytterhoeven
2014-02-16 11:46 ` Wolfram Sang
2014-02-16 11:46 ` Wolfram Sang
2014-02-17 8:04 ` Ben Dooks
2014-05-08 22:03 ` Sergei Shtylyov
2014-05-08 22:03 ` Sergei Shtylyov
[not found] ` <536BFF39.40607-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
2014-05-09 5:04 ` Wolfram Sang [this message]
2014-05-09 5:04 ` Wolfram Sang
2014-05-09 9:32 ` Ben Dooks
2014-05-09 9:32 ` Ben Dooks
[not found] ` <536CA0B1.4040300-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>
2014-05-09 22:55 ` Sergei Shtylyov
2014-05-09 22:55 ` Sergei Shtylyov
2014-01-26 16:05 ` [PATCH 5/6] i2c: update i2c_algorithm documentation Ben Dooks
2014-01-26 16:05 ` [PATCH 6/6] i2c: rcar: fix NACK error code Ben Dooks
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