lkml.org 
[lkml]   [2015]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] ARM: dts: Add ddc i2c reference to veyron
From
Lucas,

On Thu, Sep 3, 2015 at 9:13 AM, Lucas Stach <l.stach@pengutronix.de> wrote:
>> 6. Once you start using the dw_hdmi's i2c block with the currently
>> posted patch against mainline (to do this you not only need the patch
>> but you need to remove the ddc-i2c-bus property, set the pinmux, and
>> disable i2c5) then you'll see a bonafide i2c bus exposed to Linux. In
>> my case this stole i2c0 away from the builtin SoC I2C bus and caused
>> the SoC I2C bus to fail to probe. Doh.
>>
> This shouldn't happen. I don't know if the patches landed yet, but I
> know Wolfram (i2c maintainer) had patches to reserve the range of bus
> numbers that are fixed by alias nodes and don't hand out those numbers
> to adapters with a dynamic bus number allocation.
>
>> 7. I was trying to solve #6 by adding an "of_node" to the i2c bus
>> which allowed me to give it a (non-conflicting) bus ID.
>>
> This should not be needed.

Ah. It's very possible that the issue is due to the fact that I was
testing this on an old kernel (3.14) that's missing that feature. OK,
if that's fixed then at least the actual bug (making i2c0 fail to
load) is not a problem. It'd still be nice to be able to assign a bus
number to this bus just to make reading of the logs easier, but it's
not a functionality requirement.

-Doug


\
 
 \ /
  Last update: 2015-09-03 19:01    [W:0.050 / U:0.200 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site