--- zzzz-none-000/linux-5.4.213/drivers/gpio/gpiolib.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/gpio/gpiolib.c	2024-08-14 09:01:39.000000000 +0000
@@ -1586,6 +1586,27 @@
 }
 EXPORT_SYMBOL_GPL(devm_gpiochip_add_data);
 
+#ifdef CONFIG_GPIOLIB_AVM_EXTENSION
+struct gpio_chip *gpiochip_avm_find_by_name(const char *name)
+{
+	struct gpio_device *gdev;
+	struct gpio_chip *chip = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+	list_for_each_entry(gdev, &gpio_devices, list)
+		if (gdev->chip && !strcmp(gdev->chip->label, name)) {
+			chip = gdev->chip;
+			break;
+		}
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return chip;
+}
+EXPORT_SYMBOL(gpiochip_avm_find_by_name);
+#endif
+
 /**
  * gpiochip_find() - iterator for locating a specific gpio_chip
  * @data: data to pass to match function
@@ -3143,6 +3164,43 @@
 }
 EXPORT_SYMBOL_GPL(gpiod_direction_output);
 
+#ifdef CONFIG_GPIOLIB_AVM_EXTENSION
+int _gpiod_set_gpio_function_raw(struct gpio_desc *desc, unsigned int function)
+{
+	int ret;
+	struct gpio_chip *gc = desc->gdev->chip;
+
+	ret = gc->set_function(gc, gpio_chip_hwgpio(desc), function);
+
+	return 0;
+
+}
+
+int gpiod_set_gpio_function(struct gpio_desc *desc, unsigned int function)
+{
+	VALIDATE_DESC(desc);
+	return _gpiod_set_gpio_function_raw(desc, function);
+}
+EXPORT_SYMBOL_GPL(gpiod_set_gpio_function);
+
+int _gpiod_get_gpio_function_raw(struct gpio_desc *desc)
+{
+	int ret;
+	struct gpio_chip *gc = desc->gdev->chip;
+
+	ret = gc->get_function(gc, gpio_chip_hwgpio(desc));
+
+	return ret;
+}
+
+int gpiod_get_gpio_function(struct gpio_desc *desc)
+{
+	VALIDATE_DESC(desc);
+	return _gpiod_get_gpio_function_raw(desc);
+}
+EXPORT_SYMBOL_GPL(gpiod_get_gpio_function);
+#endif
+
 /**
  * gpiod_set_debounce - sets @debounce time for a GPIO
  * @desc: descriptor of the GPIO for which to set debounce time