MSM8939 Global Clock Controller

modulename: gcc-msm8939.ko

configname: CONFIG_MSM_GCC_8939

Linux Kernel Configuration
└─>Device Drivers
└─>Common Clock Framework
└─>Support for Qualcomm's clock controllers
└─>MSM8939 Global Clock Controller
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Support for the global clock controller on msm8939 devices.
Say Y if you want to use devices such as UART, SPI i2c, USB,
SD/eMMC, display, graphics, camera etc.

source code:
drivers/clk/qcom/gcc-msm8939.c