allwinner i2c [was: Options for FBSD support with LCD device - new project]

[Ian Lepore]

On Tue, 2019-03-19 at 08:28 +0200, Daniel Braniss wrote:
> I have several allwinner SoC, mainly from FriendlyArm, and neither i2c or SPI work.
> I have a hacked i2c that mostly works, but hangs sometimes :-), mainly
> timing issues of which I have no idea how to fix.
> I’m willing to help here but my knowledge of the twsi tends to zero.
> hint hint …
> 
> cheers,
>         danny

Iirc, allwinner requires working i2c even to boot, because the boards
have i2c PMIC chips on them.  I wonder if it's a case where a few small
commands to the pmic work fine but bigger transfers fail?  I dunno,
anything more you can say about the problem would help.

-- Ian