From 7b4050381127ae11fcfc74a106d715a5fbbf888a Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Thu, 14 Jul 2011 10:33:55 +0900 Subject: PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412. Exynos4-bus device devfreq driver add DVFS capability for Exynos4210/4212/4412-Bus (memory). The driver monitors PPMU counters of memory controllers and adjusts operating frequencies and voltages with OPP. For Exynos4210, vdd_int is controlled. For exynos4412/4212, vdd_mif and vdd_int are controlled. Dependency (CONFIG_EXYNOS_ASV): Exynos4 ASV driver has been posted in the mailing list; however, it si not yet upstreamed. Although the current revision of Exynos4 ASV patch does not contain "CONFIG_EXYNOS_ASV", we have added the symbol to hide the dependent from compilers for now. As soon as Exynos4 ASV drivers are merged, the #ifdef statement will be removed or the name will be changed. However, enabling ASV is essential in most Exynos4 chips to reduce the power consumption of Exynos4210 because without ASV, this Devfreq driver assumes the worst case scenario, which consumes more power. Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park --- Changes from v1 - Support 4212 and 4412 as well as 4210. --- drivers/devfreq/Makefile | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/devfreq/Makefile') diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 4564a89e970a..8c464234f7e7 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -3,3 +3,6 @@ obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o + +# DEVFREQ Drivers +obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ) += exynos4_bus.o -- cgit v1.2.3