tree a82017b53a229607d45e1913a09c1f2aab82be71
parent 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9
author Mark Brown <broonie@linaro.org> 1409051537 +0100
committer Mark Brown <broonie@linaro.org> 1409074466 +0100

regmap: Fix handling of volatile registers for format_write() chips

A previous over-zealous factorisation of code means that we only treat
registers as volatile if they are readable. For most devices this is fine
since normally most registers can be read and volatility implies
readability but for format_write() devices where there is no readback from
the hardware and we use volatility to mean simply uncacheability this means
that we end up treating all registers as cacheble.

A bigger refactoring of the code to clarify this is in order but as a fix
make a minimal change and only check readability when checking volatility
if there is no format_write() operation defined for the device.

Signed-off-by: Mark Brown <broonie@linaro.org>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: stable@vger.kernel.org