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 /arch/arm/mach-exynos4/devfreq_bus.c in the git tree. MyungJoo Ham (3): PM: Introduce DEVFREQ: generic DVFS framework with device-specific OPPs PM / DEVFREQ: add example governors PM / DEVFREQ: add sysfs interface (including user tickling) Documentation/ABI/testing/sysfs-devices-power | 50 ++ Documentation/ABI/testing/sysfs-power | 43 ++ drivers/base/power/Makefile | 1 + drivers/base/power/devfreq.c | 714 +++++++++++++++++++++++++ drivers/base/power/opp.c | 9 + include/linux/devfreq.h | 119 ++++ kernel/power/Kconfig | 34 ++ 7 files changed, 970 insertions(+), 0 deletions(-) create mode 100644 drivers/base/power/devfreq.c create mode 100644 include/linux/devfreq.h -- 1.7.4.1 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
