--- zzzz-none-000/linux-4.9.218/drivers/gpio/gpiolib.c	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/drivers/gpio/gpiolib.c	2023-03-29 10:59:06.000000000 +0000
@@ -122,6 +122,7 @@
 
 	return &gdev->descs[hwnum];
 }
+EXPORT_SYMBOL_GPL(gpiochip_get_desc);
 
 /**
  * Convert a GPIO descriptor to the integer namespace.
@@ -171,6 +172,19 @@
 	}
 }
 
+void __iomem *gpiod_avm_get_inputreg_and_bit(struct gpio_desc *desc, int *bit)
+{
+	struct gpio_chip	*chip;
+
+	chip = gpiod_to_chip(desc);
+
+	if (!chip->avm_get_inputreg_and_bit)
+		return NULL;
+
+	return chip->avm_get_inputreg_and_bit(chip, gpio_chip_hwgpio(desc), bit);
+}
+EXPORT_SYMBOL_GPL(gpiod_avm_get_inputreg_and_bit);
+
 /**
  * gpiod_get_direction - return the current direction of a GPIO
  * @desc:	GPIO to get the direction of
@@ -2971,6 +2985,7 @@
 
 	mutex_unlock(&gpio_lookup_lock);
 }
+EXPORT_SYMBOL_GPL(gpiod_add_lookup_table);
 
 /**
  * gpiod_remove_lookup_table() - unregister GPIO device consumers
@@ -2984,6 +2999,7 @@
 
 	mutex_unlock(&gpio_lookup_lock);
 }
+EXPORT_SYMBOL_GPL(gpiod_remove_lookup_table);
 
 static struct gpiod_lookup_table *gpiod_find_lookup_table(struct device *dev)
 {