gluon-web-network: support handling of active-low PoE passthrough

The Aruba AP-303H offers a switchable PSE output on ETH3. The power
state is controlled using a GPIO pin like seen on CPE210 and Nanostation
alike.

However, the PSE state is active low, which the current code handles as
"Enable PoE Passthrough disable". This is not intuitive, thus support
the active low case in the Gluon Web-UI.

Signed-off-by: David Bauer <mail@david-bauer.net>

package/gluon-web-network/luasrc/lib/gluon/config-mode/model/admin/network.lua

@@ -102,15 +102,28 @@ uci:foreach("system", "gpio_switch", function(si)
 		end
 
 		local texts = {
-			["^PoE Power Port(%d*)$"] = function(m) return translatef("Enable PoE Power Port %s", m[1]) end,
-			["^PoE Passthrough$"] = function() return translate("Enable PoE Passthrough") end,
+			["^PoE Power Port(%d*)$"] = {
+				get_title = function(m) return translatef("Enable PoE Power Port %s", m[1]) end,
+				active_low = false,
+			},
+			["^PoE Passthrough$"] = {
+				get_title = function() return translate("Enable PoE Passthrough") end,
+				active_low = false,
+			},
+			-- Typo in AP-303H (ipq40xx-generic)
+			["^POE passtrough disable$"] = {
+				get_title = function() return translate("Enable PoE Passthrough") end,
+				active_low = true,
+			},
 		}
 
 		local name
-		for pattern, func in pairs(texts) do
+		local active_low = false
+		for pattern, text_obj in pairs(texts) do
 			local match = {si.name:match(pattern)}
 			if match[1] then
-				name = func(match)
+				name = text_obj.get_title(match)
+				active_low = text_obj.active_low
 				break
 			end
 		end
@@ -120,9 +133,17 @@ uci:foreach("system", "gpio_switch", function(si)
 
 		local poe = section:option(Flag, si[".name"], name)
 		poe.default = uci:get_bool("system", si[".name"], "value")
+		if active_low then
+			poe.default = not poe.default
+		end
 
 		function poe:write(data)
-			uci:set("system", si[".name"], "value", data)
+			local write_value = data
+
+			if active_low then
+				write_value = not write_value
+			end
+			uci:set("system", si[".name"], "value", write_value)
 		end
 	end
 end)