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authorChanwoo Choi <cw00.choi@samsung.com>2015-11-03 13:04:16 +0300
committerMyungJoo Ham <myungjoo.ham@samsung.com>2016-05-03 05:20:05 +0300
commit0722249ac1f3dcc3af9e9d7ed89792a68f066660 (patch)
tree07ae8b17b2bcfdcacd1c14cd2f0b0104e5173fa7 /drivers/devfreq/Kconfig
parent04974df8049fc4240d22759a91e035082ccd18b4 (diff)
downloadlinux-0722249ac1f3dcc3af9e9d7ed89792a68f066660.tar.xz
PM / devfreq: exynos: Add generic exynos bus frequency driver
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@samsung.com> [m.reichl and linux.amoon: Tested it on exynos4412-odroidu3 board] Tested-by: Markus Reichl <m.reichl@fivetechno.de> Tested-by: Anand Moon <linux.amoon@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Diffstat (limited to 'drivers/devfreq/Kconfig')
-rw-r--r--drivers/devfreq/Kconfig15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index 4de78c552251..cedda8f1e5eb 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