possible MXS-i2c bug

Wolfram Sang w.sang at pengutronix.de
Fri Apr 27 10:59:36 EDT 2012


Hi,

> I've been thinking about the DMA approach. The problem I found out is that we 
> need to transfer all messages we're given at time in one DMA chain ... at least 
> that's how I understand it from the FSL manual (see Fig. 27-10 in the mx28 
> manual).

I can't follow you:  mxs_i2c_xfer() gets a list of messages, yet they
are iterated over in mxs_i2c_xfer_msg(). A single I2C message is
unscattered and can't be bigger than 64KB, so that should be doable?

Am I missing something by already being in weekend-mode? :)

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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