CCS/MSP432P401R: Not getting ACLK frequency from driver library

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Hello All,

I am using below call to get the ACLK but the value I am getting is ZERO.

"CS_getACLK()"

This call is in CS.c of driverlib.

Please let me know the reason for this issue. Below is the code

uint32_t ACLKFreq = 0;
ACLKFreq = CS_getACLK();
Debug_Output1(0, "ACLK: %ld", ACLKFreq);