1 files changed, 12 insertions, 0 deletions
diff --git a/lib_gpio-present.sh b/lib_gpio-present.sh
new file mode 100644
index 000000000000..af6f9fc9c980
--- /dev/null
+++ b/lib_gpio-present.sh
@@ -0,0 +1,12 @@
+gpio_present() {
+    for CHIP in /sys/class/gpio/gpiochip*; do
+        if [ -d "$CHIP" ]; then
+            BASE=`cat "$CHIP/base" || true`
+            NGPIO=`cat "$CHIP/ngpio" || true`
+            if [ -n "$BASE" ] && [ -n "$NGPIO" ] && [ "$1" -ge "$BASE" ] && [ "$1" -lt "$(($BASE+$NGPIO))" ]; then
+                return 0
+            fi
+        fi
+    done
+    return 1
+}