Ember: Send child component's action to a parent component

I am trying to call/trigger a child component's action from a parent. I've tried this a couple ways but I'm not getting anywhere. This is basically what I have so far.
I am attempting to send the action up to the parent by passing it as a parameter in the action that was passed down...
This seems a bit like a spaghetti situation but the way my project is organized, this is my result.

If anyone could, please tell me how to successfully pass an action up to the parent as a parameter. (I'm curious to know how, if possible)
If anyone also has a better suggestion on how to call a child's action, please share. Thanks in advance!

parent-component.hbs

<div onclick=></div>

parent-component.js

actionPassedFromChild: null,
....
actions: {
    parentAction(childAction){
       this.set('actionPassedFromChild', childAction);
    }
}

child-component.hbs

<div onclick=

child-component.js

....
actions: {
    anAction(){
       this.parentAction(childAction);
    }
    childAction(){
       //Some operation
    }
}

In this example, if I stop the code inside of 'anAction', I do have 'childAction'. But by the time that it gets passed into 'parentAction', it is undefined. Could anyone explain why?