gpio_switch_control.patch

gehe zur Dokumentation dieser Datei

Allow GPIO control via uci during bootup

GPIO control can be used for features like PoE passthrough.
This is implemented for Ubiquiti Nanostation (XM/XW) and TP-Link CPE510.

diff --git a/openwrt/package/base-files/files/etc/init.d/gpio_switch b/openwrt/package/base-files/files/etc/init.d/gpio_switch
new file mode 100755
index 0000000..1f1b44b
--- /dev/null
+++ b/openwrt/package/base-files/files/etc/init.d/gpio_switch
@@ -0,0 +1,42 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2015 OpenWrt.org
+
+START=98
+STOP=10
+USE_PROCD=1
+
+
+load_gpio_switch()
+{
+  local name
+  local gpio_pin
+  local value
+
+  config_get gpio_pin "$1" gpio_pin
+  config_get name "$1" name
+  config_get value "$1" value 0
+
+  local gpio_path="/sys/class/gpio/gpio${gpio_pin}"
+  # export GPIO pin for access
+  [ -d "$gpio_path" ] || {
+      echo "$gpio_pin" >/sys/class/gpio/export
+      # we need to wait a bit until the GPIO appears
+      [ -d "$gpio_path" ] || sleep 1
+      echo out >"$gpio_path/direction"
+  }
+  # write 0 or 1 to the "value" field
+  { [ "$value" = "0" ] && echo "0" || echo "1"; } >"$gpio_path/value"
+}
+
+service_triggers()
+{
+  procd_add_reload_trigger "system"
+}
+
+start_service()
+{
+  [ -e /sys/class/gpio/ ] && {
+      config_load system
+      config_foreach load_gpio_switch gpio_switch
+  }
+}
diff --git a/iopenwrt/package/base-files/files/lib/functions/uci-defaults.sh b/openwrt/package/base-files/files/lib/functions/uci-defaults.sh
index 5a8809d..6577ecd 100644
--- a/openwrt/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/openwrt/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()
+{
+  [ "$UCIDEF_GPIO_SWITCHES_CHANGED" = "1" ] && uci commit system
+}
+
 ucidef_set_interface_loopback() {
   uci batch <<EOF
 set network.loopback='interface'
diff --git a/openwrt/target/linux/ar71xx/base-files/etc/uci-defaults/01_gpio-switches b/openwrt/target/linux/ar71xx/base-files/etc/uci-defaults/01_gpio-switches
new file mode 100644
index 0000000..81d3982
--- /dev/null
+++ b/openwrt/target/linux/ar71xx/base-files/etc/uci-defaults/01_gpio-switches
@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+
+. /lib/functions/uci-defaults.sh
+. /lib/ar71xx.sh
+
+board=$(ar71xx_board_name)
+
+case "$board" in
+nanostation-m)
+  ucidef_set_gpio_switch "poe_passthrough" "PoE Passthrough" "8"
+  ;;
+nanostation-m-xw)
+  ucidef_set_gpio_switch "poe_passthrough" "PoE Passthrough" "2"
+  ;;
+cpe510)
+  ucidef_set_gpio_switch "poe_passthrough" "PoE Passthrough" "20"
+  ;;
+esac
+
+ucidef_commit_gpio_switches
+
+exit 0