PMBus and SMBUS_BLOCK with "extended" lenght

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Hi folks !

Did anybody give thoughts to how we could support "smbus" block
transfers with a size up to 0xff ? This is an extension of smbus
that part of the PMbus protocol spec.

Our current code has a lot of places where I2C_SMBUS_BLOCK_MAX is
hard wired. Including down in almost all drivers.

So it would have to be an evolutionary process.

I was thinking a message flag along with a functionality bit
maybe ?

Cheers,
Ben.
 
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