On Mon, Feb 01, 2016 at 05:58:06PM +0100, Maciej S. Szmigiero wrote:

Looks like a possible solution would be to change
regmap_raw_read() to do read using _regmap_read in
case the cache is bypassed and there is no ->read
callback defined for regmap implementation.

No, that's completely broken.  We can't do a raw read from a regmap that
doesn't offer raw access and we shouldn't pretend to do so.  If the
caller is capable of substituting a register by register read the caller
should take responsibility for that.