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Morello: is there an extra timer on the board?

Hello,

Other than the Arm's generic timer, I am wondering if there's an extra timer on the board that could be used (e.g., sp804)? The TRM and DTS (from Linux and TF-A) don't seem to have any. The TRM does mention the SP810_CTRL register used to select the source clock for the SP804 timers in the IOFPGA, but I couldn't find the memory mappings of these timers in the TRM or the DTS.

Regards,
Hesham

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Anurag Koul 10 months ago +3 verified

Hi, Hesham. There are 2 instantiations of SP804 dual timers in the Morello IOFPGA, so a total of 4 timers - Dual Timer 0 (Timers 0/1) and Dual Timer 1 (Timers 2/3). Please refer to the section -...

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0 Hesham Almatary 10 months ago in reply to Anurag Koul

Hello Anurag,

Thanks for your reply. Could you please advise how the SP804 timer entries would look like in the io_vf*.txt file? And how will that be mapped to a DTS entry e.g., for one timer instance, including the interrupt IDs and clocks?

Regards,

Hesham
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0 Hesham Almatary 10 months ago in reply to Anurag Koul

Hello Anurag,

Thanks for your reply. Could you please advise how the SP804 timer entries would look like in the io_vf*.txt file? And how will that be mapped to a DTS entry e.g., for one timer instance, including the interrupt IDs and clocks?

Regards,

Hesham
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