base-files: implemented basic GPIO control

Internal GPIO pins are used for PoE passthrough setups in multi-port
routers. This patch implemnets control over this hardware feature for
Ubiquiti Nanostations and TP-Link CPE510.

Signed-off-by: Lars Kruse <lists@sumpfralle.de>

SVN-Revision: 46271

package/base-files/files/lib/functions/uci-defaults.sh

@@ -2,6 +2,7 @@
 # Copyright (C) 2011 OpenWrt.org
 
 UCIDEF_LEDS_CHANGED=0
+UCIDEF_GPIO_SWITCHES_CHANGED=0
 
 ucidef_set_led_netdev() {
 	local cfg="led_$1"
@@ -180,6 +181,29 @@ ucidef_commit_leds()
 	[ "$UCIDEF_LEDS_CHANGED" = "1" ] && uci commit system
 }
 
+ucidef_set_gpio_switch() {
+	local cfg="gpio_switch_$1"
+	local name="$2"
+	local gpio_pin="$3"
+	# use "0" as default value
+	local default="${4:-0}"
+
+	uci -q get "system.$cfg" && return 0
+
+	uci batch <<EOF
+set system.$cfg='gpio_switch'
+set system.$cfg.name='$name'
+set system.$cfg.gpio_pin='$gpio_pin'
+set system.$cfg.value='$default'
+EOF
+	UCIDEF_GPIO_SWITCHES_CHANGED=1
+}
+
+ucidef_commit_gpio_switches()
+{
+	[ "$UCIDEF_GPIO_SWITCHES_CHANGED" = "1" ] && uci commit system
+}
+
 ucidef_set_interface_loopback() {
 	uci batch <<EOF
 set network.loopback='interface'