gpiolib: acpi: Add acpi_gpio_update_gpiod_lookup_flags() helper

This helper consolidates all settings of GPIO descriptor lookup flags and
quirks in the future if any.

No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib-acpi.c

@@ -525,6 +525,15 @@ acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *inf
 	return ret;
 }
 
+int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
+					struct acpi_gpio_info *info)
+{
+	if (info->polarity == GPIO_ACTIVE_LOW)
+		*lookupflags |= GPIO_ACTIVE_LOW;
+
+	return 0;
+}
+
 struct acpi_gpio_lookup {
 	struct acpi_gpio_info info;
 	int index;
@@ -745,10 +754,8 @@ struct gpio_desc *acpi_find_gpio(struct device *dev,
 		return ERR_PTR(-ENOENT);
 	}
 
-	if (info.polarity == GPIO_ACTIVE_LOW)
-		*lookupflags |= GPIO_ACTIVE_LOW;
-
 	acpi_gpio_update_gpiod_flags(dflags, &info);
+	acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info);
 	return desc;
 }
 

drivers/gpio/gpiolib.c

@@ -4350,9 +4350,7 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 			return desc;
 
 		acpi_gpio_update_gpiod_flags(&dflags, &info);
-
-		if (info.polarity == GPIO_ACTIVE_LOW)
-			lflags |= GPIO_ACTIVE_LOW;
+		acpi_gpio_update_gpiod_lookup_flags(&lflags, &info);
 	}
 
 	/* Currently only ACPI takes this path */

drivers/gpio/gpiolib.h

@@ -125,6 +125,8 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
 
 int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
 				 struct acpi_gpio_info *info);
+int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
+					struct acpi_gpio_info *info);
 
 struct gpio_desc *acpi_find_gpio(struct device *dev,
 				 const char *con_id,
@@ -153,6 +155,12 @@ acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *inf
 {
 	return 0;
 }
+static inline int
+acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
+				    struct acpi_gpio_info *info)
+{
+	return 0;
+}
 
 static inline struct gpio_desc *
 acpi_find_gpio(struct device *dev, const char *con_id,