v4.19.13 snapshot.
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
new file mode 100644
index 0000000..cd94980
--- /dev/null
+++ b/drivers/devfreq/event/Kconfig
@@ -0,0 +1,41 @@
+menuconfig PM_DEVFREQ_EVENT
+ bool "DEVFREQ-Event device Support"
+ help
+ The devfreq-event device provide the raw data and events which
+ indicate the current state of devfreq-event device. The provided
+ data from devfreq-event device is used to monitor the state of
+ device and determine the suitable size of resource to reduce the
+ wasted resource.
+
+ The devfreq-event device can support the various type of events
+ (e.g., raw data, utilization, latency, bandwidth). The events
+ may be used by devfreq governor and other subsystem.
+
+if PM_DEVFREQ_EVENT
+
+config DEVFREQ_EVENT_EXYNOS_NOCP
+ tristate "EXYNOS NoC (Network On Chip) Probe DEVFREQ event Driver"
+ depends on ARCH_EXYNOS || COMPILE_TEST
+ select PM_OPP
+ select REGMAP_MMIO
+ help
+ This add the devfreq-event driver for Exynos SoC. It provides NoC
+ (Network on Chip) Probe counters to measure the bandwidth of AXI bus.
+
+config DEVFREQ_EVENT_EXYNOS_PPMU
+ tristate "EXYNOS PPMU (Platform Performance Monitoring Unit) DEVFREQ event Driver"
+ depends on ARCH_EXYNOS || COMPILE_TEST
+ select PM_OPP
+ help
+ This add the devfreq-event driver for Exynos SoC. It provides PPMU
+ (Platform Performance Monitoring Unit) counters to estimate the
+ utilization of each module.
+
+config DEVFREQ_EVENT_ROCKCHIP_DFI
+ tristate "ROCKCHIP DFI DEVFREQ event Driver"
+ depends on ARCH_ROCKCHIP
+ help
+ This add the devfreq-event driver for Rockchip SoC. It provides DFI
+ (DDR Monitor Module) driver to count ddr load.
+
+endif # PM_DEVFREQ_EVENT