want to reduce cpu frequency of the i.MX23 (LQFP 128 pin) to 24 MHz for standby. Unfortunately the Linux system (Kernel 4.5) freeze after enabling CLKCTRL_CLKSEQ_BYPASS_CPU.
Here a register dump before modifing CLKCTRL_CLKSEQ_BYPASS_CPU:
HW_CLKCTRL_HBUS = 0x00000003 HW_CLKCTRL_CPU = 0x00011001 HW_CLKCTRL_CLKSEQ = 0x0000011A HW_CLKCTRL_EMI = 0x00000102
What could be the reason for this behavior?