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-rwxr-xr-xpackage/base-files/files/etc/init.d/gpio_switch42
1 files changed, 30 insertions, 12 deletions
diff --git a/package/base-files/files/etc/init.d/gpio_switch b/package/base-files/files/etc/init.d/gpio_switch
index 6b2dcdce41..24d790b065 100755
--- a/package/base-files/files/etc/init.d/gpio_switch
+++ b/package/base-files/files/etc/init.d/gpio_switch
@@ -16,21 +16,39 @@ load_gpio_switch()
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 "$gpio_path" ] || sleep 1
+ [ -z "$gpio_pin" ] && {
+ echo >&2 "Skipping gpio_switch '$name' due to missing gpio_pin"
+ return 1
}
- # direction attribute only exists if the kernel supports changing the
- # direction of a GPIO
- if [ -e "${gpio_path}/direction" ]; then
- # set the pin to output with high or low pin value
- { [ "$value" = "0" ] && echo "low" || echo "high"; } >"$gpio_path/direction"
+ local gpio_path
+ if [ -n "$(echo "$gpio_pin" | grep -E "^[0-9]+$")" ]; then
+ gpio_path="/sys/class/gpio/gpio${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 "$gpio_path" ] || sleep 1
+ }
+
+ # direction attribute only exists if the kernel supports changing the
+ # direction of a GPIO
+ if [ -e "${gpio_path}/direction" ]; then
+ # set the pin to output with high or low pin value
+ { [ "$value" = "0" ] && echo "low" || echo "high"; } \
+ >"$gpio_path/direction"
+ else
+ { [ "$value" = "0" ] && echo "0" || echo "1"; } \
+ >"$gpio_path/value"
+ fi
else
- { [ "$value" = "0" ] && echo "0" || echo "1"; } >"$gpio_path/value"
+ gpio_path="/sys/class/gpio/${gpio_pin}"
+
+ [ -d "$gpio_path" ] && {
+ { [ "$value" = "0" ] && echo "0" || echo "1"; } \
+ >"$gpio_path/value"
+ }
fi
}