e66c47fb14
Use the "low" and "high" values to configure the GPIO as an output with that initial value. It ensures that the gpio doesn't have a unwanted value during the time the direction is set to ouput and the actual value is applied. We don't need to take care of the GPIO polarity for now, since our exported GPIOs are always active low. Signed-off-by: Mathias Kresin <dev@kresin.me>
41 lines
794 B
Bash
Executable file
41 lines
794 B
Bash
Executable file
#!/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 "$1" value 0
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local gpio_path="/sys/class/gpio/gpio${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 "$gpio_path" ] || sleep 1
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}
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# set the pin to output with high or low pin value
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{ [ "$value" = "0" ] && echo "high" || echo "low"; } >"$gpio_path/direction"
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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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