openwrtv3/package/base-files/files/etc/init.d/gpio_switch
John Crispin d65916047b 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
2015-07-08 14:25:52 +00:00

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#!/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
}
}