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Commit 23631833 authored by Grant Ramsay's avatar Grant Ramsay Committed by Fabio Baltieri
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drivers: systick: Fix Cortex-M SysTick dropping 1 cycle per tick 



`last_load` is the full N cycles and `SysTick->LOAD` should
be loaded with `last_load - 1` for the calculations work
correctly.

Note: This only affects a kernel in ticked operation.
Tickless kernels periodically restart the timer correctly.

Signed-off-by: default avatarGrant Ramsay <gramsay@enphaseenergy.com>
parent 1951d837
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