linux-i2c.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Guenter Roeck <guenter.roeck-IzeFyvvaP7pWk0Htik3J/w@public.gmane.org>
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Using the gpio i2c multiplexer driver
Date: Tue, 15 Feb 2011 14:47:34 -0800	[thread overview]
Message-ID: <1297810054.24938.218.camel@groeck-laptop> (raw)

Hi all,

I am trying to use the new GPIO based I2C multiplexer. Unfortunately, I
have an initialization problem with it.

Some time after registering the multiplexer as platform driver, its
probe function is called. Unfortunately, that does not happen in sync
with I2C adapter initialization. The GPIO mux probe function is called
before the parent's (ie the multiplexed I2C adapter) probe function is
called. As a result, the GPIO mux driver does not find its parent i2c
adapter, and the probe function aborts with an error.

Any idea how I I can fix the problem, ie how I can ensure that the GPIO
mux probe function is only called after its parent I2C adapter is
initialized ?

Thanks,
Guenter

             reply	other threads:[~2011-02-15 22:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-15 22:47 Guenter Roeck [this message]
2011-02-16  7:07 ` Using the gpio i2c multiplexer driver Michael Lawnick
     [not found]   ` <4D5B77AE.20307-Mmb7MZpHnFY@public.gmane.org>
2011-02-16 14:29     ` Guenter Roeck
2011-02-16  8:13 ` Peter Korsgaard
     [not found]   ` <87ei789z3g.fsf-uXGAPMMVk8amE9MCos8gUmSdvHPH+/yF@public.gmane.org>
2011-02-16 14:28     ` Guenter Roeck
2011-02-16 23:50     ` 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=1297810054.24938.218.camel@groeck-laptop \
    --to=guenter.roeck-izefyvvap7pwk0htik3j/w@public.gmane.org \
    --cc=linux-i2c-u79uwXL29TY76Z2rM5mHXA@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 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).