Here's something I found on Sermon Nuggets by Lindy Black:
I do think we need to remember that the Father was also a prodigal in this story!
The parable of a prodigal Father, the wandering and repentance of a younger son, and a resentful firstborn brother. (Luke 15:1-3, 11b-32)
-We seldom hear the word prodigal used outside the context of this parable, and people often mistakenly assume that it means "bad." Instead, prodigal means generous, abundant, or wasteful, so prodigality is not necessarily bad. God created species and resources prodigally (abundantly), and it was good (Genesis 1:31). A philanthropist can give money prodigally (generously) to a good cause. In this parable, prodigal takes on a negative tone because the younger son "squandered his property in dissolute living" (v. 13), spending his money prodigally (wastefully).