How to get S32G2 A53 core clock?

starface42 — Mon, 08 Jan 2024 06:22:03 GMT

Hello,

I am currently using the S32G2 A53 core.

I attempted to obtain the core clock by enabling CPU_FREQ in the Kernel config and using cpufrequtils, but it appears to be unsupported.

Can I verify if the core clock is currently set to 1GHz through the CPU registers?

As shown in the figure below, I tried to check by reading the MC_CGM_1 registers, but I am uncertain if these registers provide that information.

starface42_0-1704694868261.png

```

# lscpu
Architecture: aarch64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 2
Vendor ID: ARM
Model: 4
Model name: Cortex-A53
Stepping: r0p4
BogoMIPS: 10.00
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Spec store bypass: Not affected
Vulnerability Spectre v1: Mitigation; __user pointer sanitization
Vulnerability Spectre v2: Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid

```

# cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 2:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 3:
no or unknown cpufreq driver is active on this CPU

```

Re: How to get S32G2 A53 core clock?

Daniel-Aguirre — Mon, 08 Jan 2024 17:53:38 GMT

Hi,

Which BSP version are you using? Under BSP38.0 we see the following information on regards of core clock frequency [Page 123, BSP38.0 User Manual for S32G2 Platforms]:

DanielAguirre_0-1704736396505.png

Please, let us know.

Re: How to get S32G2 A53 core clock?

starface42 — Tue, 09 Jan 2024 01:12:23 GMT

Hello,

Thank you for your message.

I am using BSP34.0.1. I have checked the values through the manual page you provided.

```

cat /sys/kernel/debug/clk/a53/clk_rate
1000000000

```

Thank you for your assistance.

topic Re: How to get S32G2 A53 core clock? in S32G

How to get S32G2 A53 core clock?

Re: How to get S32G2 A53 core clock?

Re: How to get S32G2 A53 core clock?