v4.19.13 snapshot.
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
new file mode 100644
index 0000000..32b8d4d
--- /dev/null
+++ b/drivers/devfreq/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PM_DEVFREQ) += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += devfreq-event.o
+obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o
+obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o
+obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o
+obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o
+obj-$(CONFIG_DEVFREQ_GOV_PASSIVE) += governor_passive.o
+
+# DEVFREQ Drivers
+obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ) += exynos-bus.o
+obj-$(CONFIG_ARM_RK3399_DMC_DEVFREQ) += rk3399_dmc.o
+obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra-devfreq.o
+
+# DEVFREQ Event Drivers
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/