v4.19.13 snapshot.
diff --git a/include/linux/gpio/gpio-reg.h b/include/linux/gpio/gpio-reg.h
new file mode 100644
index 0000000..5c6efd3
--- /dev/null
+++ b/include/linux/gpio/gpio-reg.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef GPIO_REG_H
+#define GPIO_REG_H
+
+struct device;
+struct irq_domain;
+
+struct gpio_chip *gpio_reg_init(struct device *dev, void __iomem *reg,
+ int base, int num, const char *label, u32 direction, u32 def_out,
+ const char *const *names, struct irq_domain *irqdom, const int *irqs);
+
+int gpio_reg_resume(struct gpio_chip *gc);
+
+#endif