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SubjectRe: [PATCH v3] i2c: at91: support atomic write xfer

> + /* FIXME: only single write request supported to 7-bit addr */

Hmm, this is quite limited. Would it be very hard to support multiple
messages? Or reads? 10 bits don't matter.

> + if (!dev->pdata->has_alt_cmd)
> + return -EOPNOTSUPP;

We should handle this in probe(), I think:

if (dev->pdata->has_alt_cmd)
at91_twi_algorithm.master_xfer_atomic = at91_twi_xfer_atomic;

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