gpio: andes: atcgpio100: Fix recursive deadlock when setting the direction of a GPIO.

Please see the following link for details.
https://es.andestech.com/scp/tasks.php?id=3717

Signed-off-by: CL Wang <[email protected]>

Author: CL Wang

drivers/gpio/gpio-atcgpio100.c

@@ -72,19 +72,25 @@ static int atcgpio_get(struct gpio_chip *gc, unsigned int gpio)
 	return (val >> gpio & 1);
 }
 
-static void atcgpio_set(struct gpio_chip *gc, unsigned int gpio, int data)
+static void atcgpio_setgpio_val(struct atcgpio_priv *priv, unsigned int gpio, int data)
 {
-	unsigned long flags;
-	struct atcgpio_priv *priv;
 	unsigned long val;
 
-	priv = gpiochip_get_data(gc);
-	spin_lock_irqsave(&priv->lock, flags);
 	if (data)
 		val = GPIO_READL(GPIO_DATA_OUT, priv->base) | (0x1UL << gpio);
 	else
 		val = GPIO_READL(GPIO_DATA_OUT, priv->base) & ~(0x1UL << gpio);
 	GPIO_WRITEL(val, GPIO_DATA_OUT, priv->base);
+}
+
+static void atcgpio_set(struct gpio_chip *gc, unsigned int gpio, int data)
+{
+	unsigned long flags;
+	struct atcgpio_priv *priv;
+
+	priv = gpiochip_get_data(gc);
+	spin_lock_irqsave(&priv->lock, flags);
+	atcgpio_setgpio_val(priv, gpio, data);
 	spin_unlock_irqrestore(&priv->lock, flags);
 }
 
@@ -111,9 +117,9 @@ static int atcgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int data)
 
 	priv = gpiochip_get_data(gc);
 	spin_lock_irqsave(&priv->lock, flags);
+	atcgpio_setgpio_val(priv, gpio, data);
 	val = GPIO_READL(PIN_DIR, priv->base) | (0x1UL << gpio);
 	GPIO_WRITEL(val, PIN_DIR, priv->base);
-	gc->set(gc, gpio, data);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	return 0;