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Adventurer
Adventurer
1,213 Views
Registered: ‎02-04-2016

Turn off Zynq UltraScale+ fabric clock from PS Linux ?

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Hi all,

 

I am trying  to run a experiment where it would be best if I can turn off the PL clock from PS, using the Linux application running in PS. Is that do-able? The clock I am referring to is the one of the low-power domain clocks : PL Fabric clock.

Goutham

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Adventurer
Adventurer
1,790 Views
Registered: ‎02-04-2016

Re: Turn off Zynq UltraScale+ fabric clock from PS Linux ?

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Hi @hbucher , Thanks for your input.
I was able to do it using the register interface of Low power clock domain of PS : The register responsible for this is https://www.xilinx.com/html_docs/registers/ug1087/ug1087-zynq-ultrascale-registers.html#mod___crl_apb.html . My source clock to soft MMCM is from this PL0 clock, which is what i can turn off and on using this register interface.

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Scholar hbucher
Scholar
1,205 Views
Registered: ‎03-22-2016

Re: Turn off Zynq UltraScale+ fabric clock from PS Linux ?

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@gouthamp I know it is possible and I always have trouble finding the proper docs.

So I use the clocking wizard  that exposes a nice AXI-LITE interface to control the clock. I think it is cleaner.

Page 38

https://www.xilinx.com/support/documentation/ip_documentation/clk_wiz/v5_1/pg065-clk-wiz.pdf

 

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Adventurer
Adventurer
1,791 Views
Registered: ‎02-04-2016

Re: Turn off Zynq UltraScale+ fabric clock from PS Linux ?

Jump to solution

Hi @hbucher , Thanks for your input.
I was able to do it using the register interface of Low power clock domain of PS : The register responsible for this is https://www.xilinx.com/html_docs/registers/ug1087/ug1087-zynq-ultrascale-registers.html#mod___crl_apb.html . My source clock to soft MMCM is from this PL0 clock, which is what i can turn off and on using this register interface.

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