lkml.org 
[lkml]   [2019]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [EXT] Re: [PATCH] i2c: pca954x: Add property to skip disabling PCA954x MUX device
Date
> 
> Hello Biwen,
>
> > + /* Errata ID E-00013 on board LS2088ARDB and LS2088ARDB:
> > + * The point here is that you must not disable a mux if there
> > + * are no pullups on the input or you mess up the I2C. This
> > + * needs to be put into the DTS really as the kernel cannot
> > + * know this otherwise.
> > + */
>
> Can you please explain what a "mess up" is?
This is a hardware bug that happened on NXP board LS2085ARDB and LS2088ARDB.
So give a software fix for the hardware bug.
>
> And also, should we put this new DTS property in related default bindings?
>
> If not, are you planning a documentation update for the users to notify them
> about this?
I will update bindings document on v2.
>
> --
> Cengiz Can <cengiz@kernel.wtf>

\
 
 \ /
  Last update: 2019-09-30 04:48    [W:0.037 / U:2.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site