gpio: grgpio: use a helper variable to store the address of ofdev->dev

Instead of dereferencing the platform device pointer repeatedly, just
store its address in a helper variable.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: Bartosz Golaszewski

drivers/gpio/gpio-grgpio.c

@@ -328,6 +328,7 @@ static const struct irq_domain_ops grgpio_irq_domain_ops = {
 static int grgpio_probe(struct platform_device *ofdev)
 {
 	struct device_node *np = ofdev->dev.of_node;
+	struct device *dev = &ofdev->dev;
 	void  __iomem *regs;
 	struct gpio_chip *gc;
 	struct grgpio_priv *priv;
@@ -337,7 +338,7 @@ static int grgpio_probe(struct platform_device *ofdev)
 	int size;
 	int i;
 
-	priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
@@ -346,28 +347,28 @@ static int grgpio_probe(struct platform_device *ofdev)
 		return PTR_ERR(regs);
 
 	gc = &priv->gc;
-	err = bgpio_init(gc, &ofdev->dev, 4, regs + GRGPIO_DATA,
+	err = bgpio_init(gc, dev, 4, regs + GRGPIO_DATA,
 			 regs + GRGPIO_OUTPUT, NULL, regs + GRGPIO_DIR, NULL,
 			 BGPIOF_BIG_ENDIAN_BYTE_ORDER);
 	if (err) {
-		dev_err(&ofdev->dev, "bgpio_init() failed\n");
+		dev_err(dev, "bgpio_init() failed\n");
 		return err;
 	}
 
 	priv->regs = regs;
 	priv->imask = gc->read_reg(regs + GRGPIO_IMASK);
-	priv->dev = &ofdev->dev;
+	priv->dev = dev;
 
 	gc->owner = THIS_MODULE;
 	gc->to_irq = grgpio_to_irq;
-	gc->label = devm_kasprintf(&ofdev->dev, GFP_KERNEL, "%pOF", np);
+	gc->label = devm_kasprintf(dev, GFP_KERNEL, "%pOF", np);
 	gc->base = -1;
 
 	err = of_property_read_u32(np, "nbits", &prop);
 	if (err || prop <= 0 || prop > GRGPIO_MAX_NGPIO) {
 		gc->ngpio = GRGPIO_MAX_NGPIO;
-		dev_dbg(&ofdev->dev,
-			"No or invalid nbits property: assume %d\n", gc->ngpio);
+		dev_dbg(dev, "No or invalid nbits property: assume %d\n",
+			gc->ngpio);
 	} else {
 		gc->ngpio = prop;
 	}
@@ -379,7 +380,7 @@ static int grgpio_probe(struct platform_device *ofdev)
 	irqmap = (s32 *)of_get_property(np, "irqmap", &size);
 	if (irqmap) {
 		if (size < gc->ngpio) {
-			dev_err(&ofdev->dev,
+			dev_err(dev,
 				"irqmap shorter than ngpio (%d < %d)\n",
 				size, gc->ngpio);
 			return -EINVAL;
@@ -389,7 +390,7 @@ static int grgpio_probe(struct platform_device *ofdev)
 						     &grgpio_irq_domain_ops,
 						     priv);
 		if (!priv->domain) {
-			dev_err(&ofdev->dev, "Could not add irq domain\n");
+			dev_err(dev, "Could not add irq domain\n");
 			return -EINVAL;
 		}
 
@@ -419,13 +420,13 @@ static int grgpio_probe(struct platform_device *ofdev)
 
 	err = gpiochip_add_data(gc, priv);
 	if (err) {
-		dev_err(&ofdev->dev, "Could not add gpiochip\n");
+		dev_err(dev, "Could not add gpiochip\n");
 		if (priv->domain)
 			irq_domain_remove(priv->domain);
 		return err;
 	}
 
-	dev_info(&ofdev->dev, "regs=0x%p, base=%d, ngpio=%d, irqs=%s\n",
+	dev_info(dev, "regs=0x%p, base=%d, ngpio=%d, irqs=%s\n",
 		 priv->regs, gc->base, gc->ngpio, priv->domain ? "on" : "off");
 
 	return 0;