Re: [PATCH] regmap: Fix i2c word access when using SMBus access functions

[Mark Brown <broonie@kernel.org>]

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On Tue, Feb 03, 2015 at 06:21:45AM -0800, Guenter Roeck wrote:
> On 02/03/2015 03:42 AM, Mark Brown wrote:

> >Perhaps it just needs to be more explicit about how it's handling native
> >endian?  I didn't spot it.

> Thinking about it, we should actually reject requests for _NATIVE. SMBus
> 16 bit accesses are either little endian or big endian.

Yes, that makes sense.  It's also hard to see a use case for _NATIVE and
smbus.

> >>I thought about that, but since the smbus functions perform endianness
> >>conversion it would mean that I would have to undo that conversion just
> >>to have it done again.

> >No, the whole point is that by doing this you avoid any endianness
> >conversions or formatting in the framework at all so you can just use
> >the smbus functions to handle the formatting.

> Ah, guess I got confused. The SMBus accesses are already using reg_read
> and reg_write.

It's also possible that you've spotted some bug, wouldn't be the first
time.  Was this spotted by code inspection or by running into a problem?

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