Reduce Frequency of IMX93 by accesing resistors from userspace

[dhruvinrajpura]

I am using IMX93 EVK where I required to reduce cpu frequency of A core which is currently 1600MHz.

I want to reduce it up to 200MHz,

Earlier for IMX8ULP EVK I followed below method and I was able to control frequency on A core with accessing appropriate resisters

# Switch a35 to FRO 192 MHz
/unit_tests/memtool -32 0x292c0014=0x08000000

# Set PLLEN to 0
/unit_tests/memtool -32 0x292c0500=0x03000000

# Read and set the division and multiplication factors
/unit_tests/memtool -32 0x292c0014 1
/unit_tests/memtool -32 0x292c0510 1


# Set PLLEN to 1"
/unit_tests/memtool -32 0x292c0500=0x03000001

# Switch a35 to PLL2"
/unit_tests/memtool -32 0x292c0014=0x18000000

mhz

 
I checked reference manual of IMX93, but I am not able to get resistor by which I can control clock,

Can anyone guide me on this?

IMX93QSB 

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

CPU Frequency is changed between Low Power Modes (ND, OD, etc.). Please refer to this post.

Regards