lkml.org 
[lkml]   [2021]   [Nov]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    SubjectRe: [PATCH v3 3/4] arm64: dts: apple: t8103: Add i2c nodes
    On Tue, Nov 23, 2021 at 3:43 PM Hector Martin <marcan@marcan.st> wrote:

    > For those following along in the list: the reason why i2c3 was getting
    > stuck is because it seems the unused bus is weakly pulled low on these
    > machines, which jams it.

    That looks like some power saving attempt.

    I suppose that means that even i2c buses that are in use
    could be weakly pulled low when suspending the system
    and maybe even inbetween transactions to save some
    leak current.

    Yours,
    Linus Walleij

    \
     
     \ /
      Last update: 2021-11-24 00:28    [W:3.031 / U:0.108 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site