Aspeed 2500 EVB i2c transaction time out

Shay Slobodkin shays at mellanox.com
Mon Aug 1 21:39:59 AEST 2016


Hi Andrew,

> -----Original Message-----
> From: Andrew Jeffery [mailto:andrew at aj.id.au]
> Sent: Monday, August 01, 2016 3:13 AM
> To: Shay Slobodkin <shays at mellanox.com>; Joel Stanley <joel at jms.id.au>
> Cc: openbmc at lists.ozlabs.org
> Subject: Re: Aspeed 2500 EVB i2c transaction time out
> 
> Hi Shay,
> 
> On Wed, 2016-07-27 at 06:52 +0000, Shay Slobodkin wrote:
> > > PS: if you are interested in testing the most recent pinctrl patches
> > > they are available at [1]. However, they're based on upstream and so
> > > will need a bit of massaging to integrate them with the
> > > openbmc/linux kernel, for instance adding the I2C mux requests to the
> I2C devicetree nodes.
> > >
> > > [1] https://github.com/amboar/linux/commits/aspeed-pinctrl-4.7-rc7
> >
> > Thank you. We tried to use this pinctrl, with no luck.
> > Currently we are still using kernel 4.6 and we receive transaction time out
> for LM75.
> > We are pending Joel's 4.7.3 when it is done.
> 
> Sorry for the distraction here, it was a bit of a long shot. Building that branch
> without further patching probably would not have muxed what you needed,
> but it also should not have had the bugs you pointed out. I think Joel was
> intending to push out a branch to support the extra i2c
> bus(es) you need. Joel?

Thank you Andrew.
By the way, we do see I2C time out issues, when trying transactions to LM75.

Joel, is there any update regarding the code? When is it supposed to be published?
We can assist with testing, if you have some half backed code to share.

> 
> Cheers,
> 
> Andrew


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