PM / devfreq: rockchip: add devfreq driver for rk3399 dmc

base on dfi result, we do ddr frequency scaling, register
dmc driver to devfreq framework, and use simple-ondemand
policy.

Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: MyngJoo Ham <myngjoo.ham@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index f08502c27784..cadd56e50b2c 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -100,6 +100,17 @@ config ARM_TEGRA_DEVFREQ
           It reads ACTMON counters of memory controllers and adjusts the
           operating frequencies and voltages with OPP support.
 
+config ARM_RK3399_DMC_DEVFREQ
+        tristate "ARM RK3399 DMC DEVFREQ Driver"
+        depends on ARCH_ROCKCHIP
+        select DEVFREQ_EVENT_ROCKCHIP_DFI
+        select DEVFREQ_GOV_SIMPLE_ONDEMAND
+        select PM_OPP
+        help
+          This adds the DEVFREQ driver for the RK3399 DMC(Dynamic Memory Controller).
+          It sets the frequency for the memory controller and reads the usage counts
+          from hardware.
+
 source "drivers/devfreq/event/Kconfig"
 
 endif # PM_DEVFREQ