--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c

@@ -580,6 +580,44 @@ static struct gpiod_hog ams_delta_gpio_hogs[] = {
 	{},
 };
 
+/*
+ * Some drivers may not use GPIO lookup tables but need to be provided
+ * with GPIO numbers.  The same applies to GPIO based IRQ lines - some
+ * drivers may even not use GPIO layer but expect just IRQ numbers.
+ * We could either define GPIO lookup tables then use them on behalf
+ * of those devices, or we can use GPIO driver level methods for
+ * identification of GPIO and IRQ numbers. For the purpose of the latter,
+ * defina a helper function which identifies GPIO chips by their labels.
+ */
+static int gpiochip_match_by_label(struct gpio_chip *chip, void *data)
+{
+	char *label = data;
+
+	return !strcmp(label, chip->label);
+}