Villain is playing 22/22 at this point in 6-max 50NL on Bovada. I assume he is a reg or half way decent player.

SB and BB are both full stacked and have reggish stats

CO raises to 3bb
Hero calls 3bb on button w K:diamond:Q:spade:
Blinds fold

Flop 6:spade:7:heart:A:spade: Pot = $3.60
Villain checks
Hero bets $1.20(with intention of barreling turn and some river)
Villain raises to $2.40

What do you range villain on here?

I assume he has some Ax, some mid PP's that are thin value raising/protection, some 68, 78, 79, 9T, etc for same reason as mid PP, a smaller portion of FD's and SD's. Given this, how would you respond? After villain takes this line, i no longer view him as a reg, more likely an okay player taking sub optimal lines. I feel as if with the spade in hand we can likely float here and bluff turns that don't improve villain(6, 7, 8)check back Kx and Qx turns, and bluff spades when checked too. Anyone have anything to contribute here?