linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Wolfram Sang <wsa@the-dreams.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] eeprom: at24: Add support for large EEPROMs connected to SMBus adapters
Date: Fri, 27 Mar 2015 09:09:47 +0100	[thread overview]
Message-ID: <20150327080947.GA900@katana> (raw)
In-Reply-To: <5512C213.7030705@roeck-us.net>

[-- Attachment #1: Type: text/plain, Size: 560 bytes --]


> just to give you an update: I do have some code, but it is a bit messy,
> and it doesn't work well for ds2482 (the chip behind it still hangs up
> if I access it in parallel through i2c-dev). On top of that, it causes
> pretty significant slow-downs when accessing other devices on the same
> bus at the same time. Not surprising, I guess, since it expands the scope
> of the bus lock significantly.

Just to get a better idea: Did you try taking the adapter_lock before
the two SMBus command which needed to be concatenated (and use
smbus_xfer directly)?


[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

  parent reply	other threads:[~2015-03-27  8:09 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-04 16:23 [PATCH] eeprom: at24: Add support for large EEPROMs connected to SMBus adapters Guenter Roeck
2015-02-04 17:47 ` Wolfram Sang
2015-02-04 19:08   ` Guenter Roeck
2015-02-04 23:35     ` Wolfram Sang
2015-02-05  0:26       ` Guenter Roeck
2015-02-05 14:40         ` Wolfram Sang
2015-02-05 17:53           ` Guenter Roeck
2015-02-12  4:01             ` Guenter Roeck
2015-02-16 12:09               ` Wolfram Sang
2015-02-16 15:37                 ` Guenter Roeck
2015-03-17  4:20                 ` Guenter Roeck
2015-03-18 13:27                   ` Wolfram Sang
2015-03-19  3:24                     ` Guenter Roeck
2015-03-19  8:16                       ` Wolfram Sang
2015-03-19 13:30                         ` Guenter Roeck
2015-03-19 17:43                         ` Guenter Roeck
2015-03-19 21:39                           ` Wolfram Sang
2015-03-25 14:11                             ` Guenter Roeck
2015-03-25 16:15                               ` Wolfram Sang
2015-03-25 16:37                                 ` Guenter Roeck
2015-03-27  8:09                               ` Wolfram Sang [this message]
2015-03-27 12:51                                 ` Guenter Roeck
2015-03-27 13:01                                   ` Wolfram Sang
2015-03-27 13:14                                     ` Guenter Roeck
2015-03-27 15:27                                       ` Wolfram Sang
2015-03-27 15:42                                         ` Guenter Roeck
2015-02-04 20:33   ` Guenter Roeck

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=20150327080947.GA900@katana \
    --to=wsa@the-dreams.de \
    --cc=linux-i2c@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@roeck-us.net \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).