[PATCH v4 5/9] serial: sc16is7xx: refactor GPIO controller registration

[Hugo Villeneuve]

From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>

In preparation for patch to fix GPIO regression. To facilitate review
and make code more modular.

Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
---
 drivers/tty/serial/sc16is7xx.c | 39 ++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 16 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 06be1daa733a..7a993add3f04 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1358,6 +1358,26 @@ static int sc16is7xx_gpio_direction_output(struct gpio_chip *chip,
 
 	return 0;
 }
+
+static int sc16is7xx_setup_gpio_chip(struct device *dev)
+{
+	struct sc16is7xx_port *s = dev_get_drvdata(dev);
+
+	if (!s->devtype->nr_gpio)
+		return 0;
+
+	s->gpio.owner		 = THIS_MODULE;
+	s->gpio.parent		 = dev;
+	s->gpio.label		 = dev_name(dev);
+	s->gpio.direction_input	 = sc16is7xx_gpio_direction_input;
+	s->gpio.get		 = sc16is7xx_gpio_get;
+	s->gpio.direction_output = sc16is7xx_gpio_direction_output;
+	s->gpio.set		 = sc16is7xx_gpio_set;
+	s->gpio.base		 = -1;
+	s->gpio.ngpio		 = s->devtype->nr_gpio;
+	s->gpio.can_sleep	 = 1;
+	return gpiochip_add_data(&s->gpio, s);
+}
 #endif
 
 static const struct serial_rs485 sc16is7xx_rs485_supported = {
@@ -1517,22 +1537,9 @@ static int sc16is7xx_probe(struct device *dev,
 	}
 
 #ifdef CONFIG_GPIOLIB
-	if (devtype->nr_gpio) {
-		/* Setup GPIO cotroller */
-		s->gpio.owner		 = THIS_MODULE;
-		s->gpio.parent		 = dev;
-		s->gpio.label		 = dev_name(dev);
-		s->gpio.direction_input	 = sc16is7xx_gpio_direction_input;
-		s->gpio.get		 = sc16is7xx_gpio_get;
-		s->gpio.direction_output = sc16is7xx_gpio_direction_output;
-		s->gpio.set		 = sc16is7xx_gpio_set;
-		s->gpio.base		 = -1;
-		s->gpio.ngpio		 = devtype->nr_gpio;
-		s->gpio.can_sleep	 = 1;
-		ret = gpiochip_add_data(&s->gpio, s);
-		if (ret)
-			goto out_thread;
-	}
+	ret = sc16is7xx_setup_gpio_chip(dev, mctrl_mask);
+	if (ret)
+		goto out_thread;
 #endif
 
 	/*
-- 
2.30.2