From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org,
michal.simek-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org,
soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
harinikatakamlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [PATCH v6] i2c: cadence: Check for errata condition involving master receive
Date: Wed, 14 Jan 2015 11:37:18 +0100 [thread overview]
Message-ID: <20150114103718.GA2615@katana> (raw)
In-Reply-To: <1421174099-19839-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 846 bytes --]
On Wed, Jan 14, 2015 at 12:04:59AM +0530, Harini Katakam wrote:
> Cadence I2C controller has the following bugs:
> - completion indication is not given to the driver at the end of
> a read/receive transfer with HOLD bit set.
> - Invalid read transaction are generated on the bus when HW timeout
> condition occurs with HOLD bit set.
>
> As a result of the above, if a set of messages to be transferred with
> repeated start includes any message following a read message,
> completion is never indicated and timeout occurs.
> Hence a check is implemented to return -EOPNOTSUPP for such sequences.
>
> Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Vishnu Motghare <vishnum-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Applied to for-next with some whitespace corrections, thanks!
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: wsa@the-dreams.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6] i2c: cadence: Check for errata condition involving master receive
Date: Wed, 14 Jan 2015 11:37:18 +0100 [thread overview]
Message-ID: <20150114103718.GA2615@katana> (raw)
In-Reply-To: <1421174099-19839-1-git-send-email-harinik@xilinx.com>
On Wed, Jan 14, 2015 at 12:04:59AM +0530, Harini Katakam wrote:
> Cadence I2C controller has the following bugs:
> - completion indication is not given to the driver at the end of
> a read/receive transfer with HOLD bit set.
> - Invalid read transaction are generated on the bus when HW timeout
> condition occurs with HOLD bit set.
>
> As a result of the above, if a set of messages to be transferred with
> repeated start includes any message following a read message,
> completion is never indicated and timeout occurs.
> Hence a check is implemented to return -EOPNOTSUPP for such sequences.
>
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Signed-off-by: Vishnu Motghare <vishnum@xilinx.com>
Applied to for-next with some whitespace corrections, thanks!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20150114/7ce2c64a/attachment.sig>
WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Harini Katakam <harinik@xilinx.com>
Cc: mark.rutland@arm.com, michal.simek@xilinx.com,
soren.brinkmann@xilinx.com, linux-arm-kernel@lists.infradead.org,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
harinikatakamlinux@gmail.com
Subject: Re: [PATCH v6] i2c: cadence: Check for errata condition involving master receive
Date: Wed, 14 Jan 2015 11:37:18 +0100 [thread overview]
Message-ID: <20150114103718.GA2615@katana> (raw)
In-Reply-To: <1421174099-19839-1-git-send-email-harinik@xilinx.com>
[-- Attachment #1: Type: text/plain, Size: 788 bytes --]
On Wed, Jan 14, 2015 at 12:04:59AM +0530, Harini Katakam wrote:
> Cadence I2C controller has the following bugs:
> - completion indication is not given to the driver at the end of
> a read/receive transfer with HOLD bit set.
> - Invalid read transaction are generated on the bus when HW timeout
> condition occurs with HOLD bit set.
>
> As a result of the above, if a set of messages to be transferred with
> repeated start includes any message following a read message,
> completion is never indicated and timeout occurs.
> Hence a check is implemented to return -EOPNOTSUPP for such sequences.
>
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Signed-off-by: Vishnu Motghare <vishnum@xilinx.com>
Applied to for-next with some whitespace corrections, thanks!
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2015-01-14 10:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-13 18:34 [PATCH v6] i2c: cadence: Check for errata condition involving master receive Harini Katakam
2015-01-13 18:34 ` Harini Katakam
[not found] ` <1421174099-19839-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2015-01-14 10:37 ` Wolfram Sang [this message]
2015-01-14 10:37 ` Wolfram Sang
2015-01-14 10:37 ` Wolfram Sang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150114103718.GA2615@katana \
--to=wsa-z923lk4zbo2bacvfa/9k2g@public.gmane.org \
--cc=harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org \
--cc=harinikatakamlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \
--cc=michal.simek-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org \
--cc=soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.