On 14.12.2015 15:38, Chanwoo Choi wrote: > This patch adds the generic exynos bus frequency driver for AMBA AXI bus > of sub-blocks in exynos SoC with DEVFREQ framework. The Samsung Exynos SoC > have the common architecture for bus between DRAM and sub-blocks in SoC. > This driver can support the generic bus frequency driver for Exynos SoCs. > > In devicetree, Each bus block has a bus clock, regulator, operation-point > and devfreq-event devices which measure the utilization of each bus block. > > Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> > [linux.amoon: Tested on Odroid U3] > Tested-by: Anand Moon <linux.amoon@xxxxxxxxx> > --- > drivers/devfreq/Kconfig | 15 ++ > drivers/devfreq/Makefile | 1 + > drivers/devfreq/exynos/Makefile | 1 + > drivers/devfreq/exynos/exynos-bus.c | 449 ++++++++++++++++++++++++++++++++++++ > 4 files changed, 466 insertions(+) > create mode 100644 drivers/devfreq/exynos/exynos-bus.c > > diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig > index 64281bb2f650..55ec774f794c 100644 > --- a/drivers/devfreq/Kconfig > +++ b/drivers/devfreq/Kconfig > @@ -66,6 +66,21 @@ config DEVFREQ_GOV_USERSPACE > > comment "DEVFREQ Drivers" > > +config ARM_EXYNOS_BUS_DEVFREQ > + bool "ARM EXYNOS Generic Memory Bus DEVFREQ Driver" > + depends on ARCH_EXYNOS > + select DEVFREQ_GOV_SIMPLE_ONDEMAND > + select DEVFREQ_EVENT_EXYNOS_PPMU > + select PM_DEVFREQ_EVENT > + select PM_OPP > + help > + This adds the common DEVFREQ driver for Exynos Memory bus. Exynos > + Memory bus has one more group of memory bus (e.g, MIF and INT block). > + Each memory bus group could contain many memoby bus block. It reads > + PPMU counters of memory controllers by using DEVFREQ-event device > + and adjusts the operating frequencies and voltages with OPP support. > + This does not yet operate with optimal voltages. > + > config ARM_EXYNOS4_BUS_DEVFREQ > bool "ARM Exynos4210/4212/4412 Memory Bus DEVFREQ Driver" > depends on (CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM > diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile > index 5134f9ee983d..375ebbb4fcfb 100644 > --- a/drivers/devfreq/Makefile > +++ b/drivers/devfreq/Makefile > @@ -6,6 +6,7 @@ obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o > obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o > > # DEVFREQ Drivers > +obj-$(CONFIG_ARCH_EXYNOS) += exynos/ Why limiting it to ARCH_EXYNOS? Are there real dependencies on exynos mach code? Or on ARM code? If not, then this probably should be obj-y to allow compile testing. Particular objects would be selected by ARM_EXYNOS_BUS_DEVFREQ. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
