Hi, On 2015년 12월 15일 12:41, Krzysztof Kozlowski wrote: > 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? There is no dependency. > > If not, then this probably should be obj-y to allow compile testing. > Particular objects would be selected by ARM_EXYNOS_BUS_DEVFREQ. OK. I'll alter it as obj-y. Best Regards, Chanwoo Choi -- 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
