Linux/TDA2E: vision SDK 3.02 A15 set clock freqency

yumei hong

Intellectual 365 points

Part Number: TDA2E

Tool/software: Linux

Hi,

I would like to change a15 clock freqency.

Can I use SysCtlClockSet() function to change clock freqency and use SysCtlClockGet() to check?

If I can not use this function.Which function I can to use?

Thanks

yumei

SysCtlClockSet()

over 6 years ago

0 Yordan Kamenov over 6 years ago

TI__Mastermind 42515 points

Hi Yumei,

do you run Linux on A15? You an check this guide how to configure A15 frequency:

Also in Linux kernel Dynamic Voltage and Frequency scaling is enabled:

Regards,

Yordan

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yordan

I run Linux on A15.

I try to use CPUFreq to change frequency.

I want to run below code in my sdk folder(PROCESSOR_SDK_VISION_03_02_00_00/vision_sdk/build/),but it is failed.

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- dra7xx-evm_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage -j8

it show error message like:

make: *** No rule to make target `distclean'. Stop.

make: *** No rule to make target `tisdk_dra7xx-evm_defconfig'. Stop.

make: *** No rule to make target `zImage'. Stop.

I see this code from this question last reply: https://e2e.ti.com/support/processors/f/791/t/648120?Linux-AM5728-CPU-frequency-scaling-support

Did i run error path or error code?


thanks

Yumei

0 Shravan Karthik over 6 years ago in reply to yumei hong

TI__Genius 14650 points

Hi Yumei,

You need to build the kernel from the kernel folder and not from Vision-SDK.

In the kernel folder (present in ti_components/os_tools), run the following commands to make kernel:

make ARCH=arm omap2plus_defconfig

./ti_config_fragments/defconfig_builder.sh -t ti_sdk_dra7x_release

make zImage

make modules

make MOD_INSTALL_PATH=<path_to_your_file_system> modules_install

Then copy the zImage and the modules in the file-system to your target.

To change the frequency you need to have CONFIG_CPU_FREQ_GOV_USERSPACE=y in the kernel config.

Regards

Shravan

0 yumei hong over 6 years ago in reply to Shravan Karthik

Intellectual 365 points

When I run make zImage to sjow some error message below.

warning: (INTEL_SOC_DTS_IOSF_CORE && MMC_SDHCI_ACPI && PUNIT_ATOM_DEBUG) selects IOSF_MBI which has unmet direct dependencies (PCI)

#
# configuration written to .config
#
warning: (INTEL_SOC_DTS_IOSF_CORE && MMC_SDHCI_ACPI && PUNIT_ATOM_DEBUG) selects IOSF_MBI which has unmet direct dependencies (PCI)
make: *** No rule to make target `zImage'. Stop.

Do I need to set up other things before make zImage?

thanks

Yumei

0 Yordan Kamenov over 6 years ago in reply to yumei hong

TI__Mastermind 42515 points

Hi Yumei,

can you try the following:

make ARCH=arm omap2plus_defconfig
./ti_config_fragments/defconfig_builder.sh -t ti_sdk_dra7x_release
make ti_sdk_dra7x_release_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules

and see if you get errors?

regards,

Yordan

0 Yordan Kamenov over 6 years ago in reply to Yordan Kamenov

TI__Mastermind 42515 points

Hi Yumei,

I haven't heard back from you, I'm assuming you were able to resolve your issue.
If not, just post a reply below (or create a new thread if the thread has locked due to time-out).

Regards,
Yordan

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yordan

I still show some error message when make zImage.

But I continue run other step.

I confuse about whith modules I need to copy to sd card.

Because I find folder name modules in my sd card not a file.

Thanks

Yumei

0 Yordan Kamenov over 6 years ago in reply to yumei hong

TI__Mastermind 42515 points

Hi Yumei,

what is the error you get?

Regards,

Yordan

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yotdan

below message is the error,when I run make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage.

drivers/built-in.o: In function `hip04_mask_irq':
/home/autorad/PROCESSOR_SDK_VISION_03_02_00_00/ti_components/os_tools/linux/kernel/omap/drivers/irqchip/irq-hip04.c:98:(.text+0x1960): additional relocation overflows omitted from the output
make: *** [vmlinux] Error 1

thanks

Yumei

0 Yordan Kamenov over 6 years ago in reply to yumei hong

TI__Mastermind 42515 points

Hi Yumei,

what are the changes you have compared to the original tag REL_VISION_SDK_03_02_00_00?

Regards,

Yordan

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yoedan

Do you mean to chage which file in sd card?

Thanks

Yumei

0 Yordan Kamenov over 6 years ago in reply to yumei hong

TI__Mastermind 42515 points

Hi Yumei,

what are your changes in the kernel source code, compared to the default from the SDK?

Are you able to compile it without any modifications?

Regards,

Yordan

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yordan

I cannot to compile it without any modifications.

Because original code which I want to set frequency,it had been modified many times by the others.

Thanks

Yumei

0 yumei hong over 6 years ago in reply to Yordan Kamenov

Intellectual 365 points

Hi Yordan

I cannot compared to the original code,because my original code which had been modified many times by the others.

Yumei

0 Yordan Kamenov over 6 years ago in reply to yumei hong

TI__Mastermind 42515 points

Hi Yumei,

are you able to build the kernel with "make linux" from vision_sdk/build directory?

Regards,

Yordan

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Linux/TDA2E: vision SDK 3.02 A15 set clock freqency

SysCtlClockSet()