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authorJohn Crispin <john@openwrt.org>2015-07-08 14:25:52 +0000
committerJohn Crispin <john@openwrt.org>2015-07-08 14:25:52 +0000
commitd65916047b44d6d157d88d15e8e3d92555c5e6f8 (patch)
treed56188236b309c68e89d312bddcf006a6e624f48 /package
parent227aafc4dbf704e8c2c5e28bbad10a32d9cad6cb (diff)
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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
Diffstat (limited to 'package')
-rwxr-xr-xpackage/base-files/files/etc/init.d/gpio_switch42
-rw-r--r--package/base-files/files/lib/functions/uci-defaults.sh24
2 files changed, 66 insertions, 0 deletions
diff --git a/package/base-files/files/etc/init.d/gpio_switch b/package/base-files/files/etc/init.d/gpio_switch
new file mode 100755
index 0000000000..1f1b44b212
--- /dev/null
+++ b/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/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index 5a8809d68c..6577ecdcde 100644
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/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'