From mboxrd@z Thu Jan  1 00:00:00 1970
From: pebolle@tiscali.nl (Paul Bolle)
Date: Wed, 22 Oct 2014 18:35:02 +0200
Subject: i2c-dev
In-Reply-To: <20141022015444.GB33678@John-de-la-Garzas-Macbook-Pro.local>
References: <20141022015444.GB33678@John-de-la-Garzas-Macbook-Pro.local>
Message-ID: <1413995702.17121.4.camel@x220>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Having looked into this a bit, but failing to come up with something
helpful, I decided to ask some additional info.

On Tue, 2014-10-21 at 21:54 -0400, John de la Garza wrote:
> I have my kernel

Which version (roughly)?

>  built with dev-i2c and i2c_i801

.config, please?

>  but do not have
> a /dev entry.
> 
> lspci shows this:
> 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)

What are the PCI vendor and device codes? See "lspci -nn".

> dmesg shows this:
> [    1.566003] i801_smbus 0000:00:1f.3: enabling device (0000 -> 0003)
> 
> ls /sys/bus/i2c/devices/ shows nothing...
> 
> on running this on a MacBookPro6,2
> 
> What am I missing?  Shouldn't I see a i2c device?  I think SMBus is
> a subset of i2c and I should be able to use that subset, right?


Paul Bolle