mb/protectli/vault_ehl: Program ITE EC to respect SB power option

Change-Id: I7d5aa58cb7db41b558d9dc9d38d737053d1fe8aa
Upstream-Status: Pending
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>

Author: miczyg1

src/mainboard/protectli/vault_ehl/devicetree.cb

@@ -183,13 +183,24 @@ chip soc/intel/elkhartlake
 		device pci 1e.7 off	end # IOAPIC
 
 		device pci 1f.0 on	# eSPI interface
+			# LPC generic I/O ranges
+			register "gen1_dec" = "0x00fc0201"
+			register "gen2_dec" = "0x003c0a01"
+			register "gen3_dec" = "0x000c0081"
+
 			chip superio/ite/it8613e
 				device pnp 2e.1 on	# COM 1
 					io 0x60 = 0x3f8
 					irq 0x70 = 4
 					irq 0xf0 = 1
 				end
-				device pnp 2e.4 off end # Environment Controller
+				device pnp 2e.4 on	# Environment Controller
+					io 0x60 = 0xa20
+					io 0x62 = 0xa10
+					irq 0x70 = 0	# Don't use IRQ
+					irq 0xf0 = 0x80 # Clear 3VSB off status
+					irq 0xf4 = 0x60 # Use SB to control AC power loss
+				end
 				device pnp 2e.5 off end # Keyboard
 				device pnp 2e.6 off end # Mouse
 				device pnp 2e.7 off end # GPIO