GPIO performance
I'm running Armbian on my A64 2G Rev B and driving the GPIO pins with GPIOD and MMIO (userspace Linux). With GPIOD I get around 370 KHz doing write toggle. With MMIO is shows 2588 KHz, but on a scope it's really around 630 KHz. This same code works fine across multiple other boards My mapping file is Is this reasonable?

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