PCI: aardvark: Switch to using devm_gpiod_get_optional()

Switch the driver to the generic version of gpiod API (and away from
OF-specific variant), so that we can stop exporting
devm_gpiod_get_from_of_node().

Link: https://lore.kernel.org/r/Y3KMEZFv6dpxA+Gv@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Pali Rohár <pali@kernel.org>

Author: dtor

drivers/pci/controller/pci-aardvark.c

@@ -1859,20 +1859,18 @@ static int advk_pcie_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node,
-						       "reset-gpios", 0,
-						       GPIOD_OUT_LOW,
-						       "pcie1-reset");
+	pcie->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
 	ret = PTR_ERR_OR_ZERO(pcie->reset_gpio);
 	if (ret) {
-		if (ret == -ENOENT) {
-			pcie->reset_gpio = NULL;
-		} else {
-			if (ret != -EPROBE_DEFER)
-				dev_err(dev, "Failed to get reset-gpio: %i\n",
-					ret);
-			return ret;
-		}
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "Failed to get reset-gpio: %i\n", ret);
+		return ret;
+	}
+
+	ret = gpiod_set_consumer_name(pcie->reset_gpio, "pcie1-reset");
+	if (ret) {
+		dev_err(dev, "Failed to set reset gpio name: %d\n", ret);
+		return ret;
 	}
 
 	ret = of_pci_get_max_link_speed(dev->of_node);