MyungJoo Ham [off-list ref] writes:

The patchset revision v8 has minor updates since v7 and v6.
- Allow governors to have their own sysfs interface and init/exit callbacks.

The patches 1/5 (OPP notifier) and 2/5 (DEVFREQ core) have no changes since v7.
There has been reordering between "add common sysfs interfaces" patch
and "add basic governors" (3/5 and 5/5)
"add internal interfaces for governors (4/5)" patch has been newly
introduced at v8 patchset.

For a usage example, please look at
http://git.infradead.org/users/kmpark/linux-2.6-samsung/shortlog/refs/heads/devfreq

In the above git tree, DVFS (dynamic voltage and frequency scaling) mechanism
is applied to the memory bus of Exynos4210 for Exynos4210-NURI boards.
In the example, the LPDDR2 DRAM frequency changes between 133, 266, and 400MHz
and other related clocks simply follow the determined DDR RAM clock.

The DEVFREQ driver for Exynos4210 memory bus is at
/drivers/devfreq/exynos4210_memorybus.c in the git tree.

Minor nit: you continue to use DEVFREQ (all caps) throughout subjects
and changelogs etc. when it should be called devfreq since it's not an
acryonym.

Kevin