NFC: pn544: use flags argument of devm_gpiod_get to set direction

Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*()
functions) which appeared in v3.17-rc1, the gpiod_get* functions
take an additional parameter that allows to specify direction and
initial value for output.

Use this to simplify the driver. Furthermore this is one caller less
that stops us making the flags argument to gpiod_get*() mandatory.

While touching this also do some minor coding style fixes.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/nfc/pn544/i2c.c

···
 		return -ENODEV;
 
 	/* Get EN GPIO from ACPI */
-	gpiod_en = devm_gpiod_get_index(dev, PN544_GPIO_NAME_EN, 1);
+	gpiod_en = devm_gpiod_get_index(dev, PN544_GPIO_NAME_EN, 1,
+					GPIOD_OUT_LOW);
 	if (IS_ERR(gpiod_en)) {
-		nfc_err(dev,
-			"Unable to get EN GPIO\n");
+		nfc_err(dev, "Unable to get EN GPIO\n");
 		return -ENODEV;
 	}
 
-	phy->gpio_en  = desc_to_gpio(gpiod_en);
-
-	/* Configuration EN GPIO */
-	ret = gpiod_direction_output(gpiod_en, 0);
-	if (ret) {
-		nfc_err(dev, "Fail EN pin direction\n");
-		return ret;
-	}
+	phy->gpio_en = desc_to_gpio(gpiod_en);
 
 	/* Get FW GPIO from ACPI */
-	gpiod_fw = devm_gpiod_get_index(dev, PN544_GPIO_NAME_FW, 2);
+	gpiod_fw = devm_gpiod_get_index(dev, PN544_GPIO_NAME_FW, 2,
+					GPIOD_OUT_LOW);
 	if (IS_ERR(gpiod_fw)) {
-		nfc_err(dev,
-			"Unable to get FW GPIO\n");
+		nfc_err(dev, "Unable to get FW GPIO\n");
 		return -ENODEV;
 	}
 
-	phy->gpio_fw  = desc_to_gpio(gpiod_fw);
-
-	/* Configuration FW GPIO */
-	ret = gpiod_direction_output(gpiod_fw, 0);
-	if (ret) {
-		nfc_err(dev, "Fail FW pin direction\n");
-		return ret;
-	}
+	phy->gpio_fw = desc_to_gpio(gpiod_fw);
 
 	/* Get IRQ GPIO */
-	gpiod_irq = devm_gpiod_get_index(dev, PN544_GPIO_NAME_IRQ, 0);
+	gpiod_irq = devm_gpiod_get_index(dev, PN544_GPIO_NAME_IRQ, 0,
+					 GPIOD_IN);
 	if (IS_ERR(gpiod_irq)) {
-		nfc_err(dev,
-			"Unable to get IRQ GPIO\n");
+		nfc_err(dev, "Unable to get IRQ GPIO\n");
 		return -ENODEV;
 	}
 
 	phy->gpio_irq = desc_to_gpio(gpiod_irq);
-
-	/* Configure IRQ GPIO */
-	ret = gpiod_direction_input(gpiod_irq);
-	if (ret) {
-		nfc_err(dev, "Fail IRQ pin direction\n");
-		return ret;
-	}
 
 	/* Map the pin to an IRQ */
 	ret = gpiod_to_irq(gpiod_irq);