Question about barebox*/drivers/mfd/mc34704.c and ACCURATE I²C mode ...

[Sascha Hauer]

Hi Roland,

On Mon, Apr 16, 2018 at 01:19:39PM +0300, Baruch Siach wrote:
> Hi Roland,
> 
> On Mon, Apr 16, 2018 at 09:52:14AM +0000, Mainz, Roland wrote:
> > Two small questions about drivers/mfd/mc34704.c in the barebox codebase:
> > 1. mc34704 has an ACCURATE bit (I2CSET1, see 
> > https://www.nxp.com/docs/en/data-sheet/MC34704.pdf) which requires that all 
> > read/write commands are send twice - does the barebox code have any support 
> > for that in the current versions ?
> > 2. Is this "accurate I²C communication mode" enabled by that bit a 
> > vendor-specific protocol extension or is it part of the I²C standard ?

I never heard of "accurate I²C", it must be something the chip designers
have invented. Also there is no support for it neither in the mc34704
driver nor in the generic I²C support.

Sascha

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