1 files changed, 27 insertions, 0 deletions
diff --git a/recipes-demo/de10-nano-gpio-apps/files/find_gpio_controllers_dt.src b/recipes-demo/de10-nano-gpio-apps/files/find_gpio_controllers_dt.src
new file mode 100644
index 0000000..9fd38f8
--- /dev/null
+++ b/recipes-demo/de10-nano-gpio-apps/files/find_gpio_controllers_dt.src
@@ -0,0 +1,27 @@
+function find_gpio_controllers_dt ()
+{
+    for NEXT in $(find -L /proc/device-tree -name "compatible" | sort);
+    do
+        cat ${NEXT} | grep -xz "snps,dw-apb-gpio" > /dev/null && {
+            GPIO_DIRNAME="$(dirname ${NEXT})";
+            echo ${GPIO_DIRNAME};
+            GPIO_COMPATIBLE="$(cat ${GPIO_DIRNAME}/compatible)";
+            echo -e "\tcompatible = '${GPIO_COMPATIBLE}'";
+            WF="${GPIO_DIRNAME}/gpio-controller@0/snps,nr-gpios";
+            GPIO_HEX_WIDTH="$(hexdump -v -e '"0x"' -e '4/1 "%02x"' "${WF}")";
+            GPIO_WIDTH=$(printf "%d" ${GPIO_HEX_WIDTH});
+            echo -e "\t     width = '${GPIO_WIDTH}'"
+        };
+        cat ${NEXT} | grep -e "altr,pio" > /dev/null && {
+            GPIO_DIRNAME="$(dirname ${NEXT})";
+            echo ${GPIO_DIRNAME};
+            GPIO_COMPATIBLE="$(cat ${GPIO_DIRNAME}/compatible)";
+            echo -e "\tcompatible = '${GPIO_COMPATIBLE}'";
+            WF="${GPIO_DIRNAME}/altr,gpio-bank-width";
+            GPIO_HEX_WIDTH="$(hexdump -v -e '"0x"' -e '4/1 "%02x"' "${WF}")";
+            GPIO_WIDTH=$(printf "%d" ${GPIO_HEX_WIDTH});
+            echo -e "\t     width = '${GPIO_WIDTH}'"
+        };
+    done
+}
+