diff --git a/src/include/gpio.h b/src/include/gpio.h
index e54b156ce7..7b64ebfe80 100644
--- a/src/include/gpio.h
+++ b/src/include/gpio.h
@@ -34,6 +34,15 @@ void gpio_input_pullup(gpio_t gpio);
 void gpio_input(gpio_t gpio);
 void gpio_output(gpio_t gpio, int value);
 
+/*
+ * Read the value presented by the set of GPIOs, when each pin is interpreted
+ * as a base-2 digit (LOW = 0, HIGH = 1).
+ *
+ * gpio[]: pin positions to read. gpio[0] is less significant than gpio[1].
+ * num_gpio: number of pins to read.
+ */
+int gpio_base2_value(gpio_t gpio[], int num_gpio);
+
 /*
  * Read the value presented by the set of GPIOs, when each pin is interpreted
  * as a base-3 digit (LOW = 0, HIGH = 1, Z/floating = 2).
diff --git a/src/lib/gpio.c b/src/lib/gpio.c
index 3a646e0d1d..0875538bae 100644
--- a/src/lib/gpio.c
+++ b/src/lib/gpio.c
@@ -22,6 +22,18 @@
 #include <delay.h>
 #include <gpio.h>
 
+int gpio_base2_value(gpio_t gpio[], int num_gpio)
+{
+	int i, result = 0;
+
+	for (i = 0; i < num_gpio; i++) {
+		gpio_input(gpio[i]);
+		result |= gpio_get(gpio[i]) << i;
+	}
+
+	return result;
+}
+
 int gpio_base3_value(gpio_t gpio[], int num_gpio)
 {
 	/*