Add a new function gpiochip_fwd_register(), which finalizes the
initialization of the forwarder and registers the corresponding gpiochip.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
---
 drivers/gpio/gpio-aggregator.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index 43e488ee83834417b12bd23b177cc74b7d28faef..95415f92843606550e6494776354f918cd58ab6c 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -538,6 +538,18 @@ static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
 	return 0;
 }
 
+static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
+{
+	struct gpio_chip *chip = &fwd->chip;
+
+	if (chip->can_sleep)
+		mutex_init(&fwd->mlock);
+	else
+		spin_lock_init(&fwd->slock);
+
+	return devm_gpiochip_add_data(chip->parent, chip, fwd);
+}
+
 /**
  * gpiochip_fwd_create() - Create a new GPIO forwarder
  * @dev: Parent device pointer
@@ -575,18 +587,13 @@ static struct gpiochip_fwd *gpiochip_fwd_create(struct device *dev,
 			return ERR_PTR(error);
 	}
 
-	if (chip->can_sleep)
-		mutex_init(&fwd->mlock);
-	else
-		spin_lock_init(&fwd->slock);
-
 	if (features & FWD_FEATURE_DELAY) {
 		error = gpiochip_fwd_setup_delay_line(dev, chip, fwd);
 		if (error)
 			return ERR_PTR(error);
 	}
 
-	error = devm_gpiochip_add_data(dev, chip, fwd);
+	error = gpiochip_fwd_register(fwd);
 	if (error)
 		return ERR_PTR(error);
 

-- 
2.47.2