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67 lines
1.3 KiB
Bash
67 lines
1.3 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2015 OpenWrt.org
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START=94
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STOP=10
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USE_PROCD=1
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load_gpio_switch()
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{
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local name
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local gpio_pin
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local value
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config_get gpio_pin "$1" gpio_pin
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config_get name "$1" name
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config_get value "$1" value 0
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[ -z "$gpio_pin" ] && {
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echo >&2 "Skipping gpio_switch '$name' due to missing gpio_pin"
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return 1
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}
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local gpio_path
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if [ -n "$(echo "$gpio_pin" | grep -E "^[0-9]+$")" ]; then
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gpio_path="/sys/class/gpio/gpio${gpio_pin}"
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# export GPIO pin for access
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[ -d "$gpio_path" ] || {
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echo "$gpio_pin" >/sys/class/gpio/export
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# we need to wait a bit until the GPIO appears
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[ -d "$gpio_path" ] || sleep 1
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}
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# direction attribute only exists if the kernel supports changing the
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# direction of a GPIO
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if [ -e "${gpio_path}/direction" ]; then
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# set the pin to output with high or low pin value
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{ [ "$value" = "0" ] && echo "low" || echo "high"; } \
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>"$gpio_path/direction"
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else
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{ [ "$value" = "0" ] && echo "0" || echo "1"; } \
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>"$gpio_path/value"
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fi
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else
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gpio_path="/sys/class/gpio/${gpio_pin}"
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[ -d "$gpio_path" ] && {
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{ [ "$value" = "0" ] && echo "0" || echo "1"; } \
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>"$gpio_path/value"
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}
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fi
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}
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service_triggers()
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{
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procd_add_reload_trigger "system"
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}
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start_service()
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{
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[ -e /sys/class/gpio/ ] && {
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config_load system
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config_foreach load_gpio_switch gpio_switch
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}
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}
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