delay() and clock_t

Trying to use a standard delay function to keep and output low for several seconds.  It is P0.10 on the 52840 set to Active Low and I do see it transition to a low on the o'scope when I use the value of 1 in the set command.  I need it to transition back high after 1500ms so I need to have a delay between the two set commands.  Was going to use Timer or RTC, but this is a simple delay, so I thought to use the delay() function.

What is the zephyr equivalent to this in the 2.4.1 zephyr?   I have time.h defined but as I go through that I do not see the clock_t type in there anywhere.  I'm just looking for the standard delay function that uses the clock tics.  

Stephen

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