Merge branch 'pci/controller/gpio'

- Include <linux/irqchip/chained_irq.h> in dra7xx to avoid implicitly
  including it elsewhere (Andy Shevchenko)

- Remove unused <linux/of_gpio.h> from aardvark and dwc drivers (dra7xx,
  meson, qcom, tegra194) (Andy Shevchenko)

- Convert kirin to use scoped for_each_available_child_of_node() to ease
  future error exits (Javier Carrasco)

- Convert imx6 and kirin to use the agnostic GPIO API to simplify GPIO
  setup and remove usage of the deprecated of_gpio.h API (Andy Shevchenko)

* pci/controller/gpio:
  PCI: kirin: Convert to use agnostic GPIO API
  PCI: kirin: Convert kirin_pcie_parse_port() to scoped iterator
  PCI: imx6: Convert to use agnostic GPIO API
  PCI: dwc: Remove unused of_gpio.h inclusion
  PCI: aardvark: Remove unused of_gpio.h inclusion
  PCI: dra7xx: Add missing chained IRQ header inclusion

Author: bjorn-helgaas

drivers/pci/controller/dwc/pci-dra7xx.c

@@ -13,11 +13,11 @@
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_pci.h>
 #include <linux/pci.h>
 #include <linux/phy/phy.h>

drivers/pci/controller/dwc/pci-imx6.c

@@ -11,14 +11,13 @@
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_address.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
@@ -107,8 +106,7 @@ struct imx6_pcie_drvdata {
 
 struct imx6_pcie {
 	struct dw_pcie		*pci;
-	int			reset_gpio;
-	bool			gpio_active_high;
+	struct gpio_desc	*reset_gpiod;
 	bool			link_is_up;
 	struct clk_bulk_data	clks[IMX6_PCIE_MAX_CLKS];
 	struct regmap		*iomuxc_gpr;
@@ -721,9 +719,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 	}
 
 	/* Some boards don't have PCIe reset GPIO. */
-	if (gpio_is_valid(imx6_pcie->reset_gpio))
-		gpio_set_value_cansleep(imx6_pcie->reset_gpio,
-					imx6_pcie->gpio_active_high);
+	gpiod_set_value_cansleep(imx6_pcie->reset_gpiod, 1);
 }
 
 static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
@@ -771,10 +767,9 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 	}
 
 	/* Some boards don't have PCIe reset GPIO. */
-	if (gpio_is_valid(imx6_pcie->reset_gpio)) {
+	if (imx6_pcie->reset_gpiod) {
 		msleep(100);
-		gpio_set_value_cansleep(imx6_pcie->reset_gpio,
-					!imx6_pcie->gpio_active_high);
+		gpiod_set_value_cansleep(imx6_pcie->reset_gpiod, 0);
 		/* Wait for 100ms after PERST# deassertion (PCIe r5.0, 6.6.1) */
 		msleep(100);
 	}
@@ -1285,22 +1280,11 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(pci->dbi_base);
 
 	/* Fetch GPIOs */
-	imx6_pcie->reset_gpio = of_get_named_gpio(node, "reset-gpio", 0);
-	imx6_pcie->gpio_active_high = of_property_read_bool(node,
-						"reset-gpio-active-high");
-	if (gpio_is_valid(imx6_pcie->reset_gpio)) {
-		ret = devm_gpio_request_one(dev, imx6_pcie->reset_gpio,
-				imx6_pcie->gpio_active_high ?
-					GPIOF_OUT_INIT_HIGH :
-					GPIOF_OUT_INIT_LOW,
-				"PCIe reset");
-		if (ret) {
-			dev_err(dev, "unable to get reset gpio\n");
-			return ret;
-		}
-	} else if (imx6_pcie->reset_gpio == -EPROBE_DEFER) {
-		return imx6_pcie->reset_gpio;
-	}
+	imx6_pcie->reset_gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(imx6_pcie->reset_gpiod))
+		return dev_err_probe(dev, PTR_ERR(imx6_pcie->reset_gpiod),
+				     "unable to get reset gpio\n");
+	gpiod_set_consumer_name(imx6_pcie->reset_gpiod, "PCIe reset");
 
 	if (imx6_pcie->drvdata->clks_cnt >= IMX6_PCIE_MAX_CLKS)
 		return dev_err_probe(dev, -ENOMEM, "clks_cnt is too big\n");

drivers/pci/controller/dwc/pci-meson.c

@@ -9,7 +9,6 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
-#include <linux/of_gpio.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>

drivers/pci/controller/dwc/pcie-kirin.c

@@ -12,12 +12,10 @@
 #include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_pci.h>
 #include <linux/phy/phy.h>
 #include <linux/pci.h>
@@ -78,16 +76,16 @@ struct kirin_pcie {
 	void		*phy_priv;	/* only for PCIE_KIRIN_INTERNAL_PHY */
 
 	/* DWC PERST# */
-	int		gpio_id_dwc_perst;
+	struct gpio_desc *id_dwc_perst_gpio;
 
 	/* Per-slot PERST# */
 	int		num_slots;
-	int		gpio_id_reset[MAX_PCI_SLOTS];
+	struct gpio_desc *id_reset_gpio[MAX_PCI_SLOTS];
 	const char	*reset_names[MAX_PCI_SLOTS];
 
 	/* Per-slot clkreq */
 	int		n_gpio_clkreq;
-	int		gpio_id_clkreq[MAX_PCI_SLOTS];
+	struct gpio_desc *id_clkreq_gpio[MAX_PCI_SLOTS];
 	const char	*clkreq_names[MAX_PCI_SLOTS];
 };
 
@@ -381,15 +379,20 @@ static int kirin_pcie_get_gpio_enable(struct kirin_pcie *pcie,
 	pcie->n_gpio_clkreq = ret;
 
 	for (i = 0; i < pcie->n_gpio_clkreq; i++) {
-		pcie->gpio_id_clkreq[i] = of_get_named_gpio(dev->of_node,
-						    "hisilicon,clken-gpios", i);
-		if (pcie->gpio_id_clkreq[i] < 0)
-			return pcie->gpio_id_clkreq[i];
+		pcie->id_clkreq_gpio[i] = devm_gpiod_get_index(dev,
+							"hisilicon,clken", i,
+							GPIOD_OUT_LOW);
+		if (IS_ERR(pcie->id_clkreq_gpio[i]))
+			return dev_err_probe(dev, PTR_ERR(pcie->id_clkreq_gpio[i]),
+					     "unable to get a valid clken gpio\n");
 
 		pcie->clkreq_names[i] = devm_kasprintf(dev, GFP_KERNEL,
 						       "pcie_clkreq_%d", i);
 		if (!pcie->clkreq_names[i])
 			return -ENOMEM;
+
+		gpiod_set_consumer_name(pcie->id_clkreq_gpio[i],
+					pcie->clkreq_names[i]);
 	}
 
 	return 0;
@@ -400,49 +403,49 @@ static int kirin_pcie_parse_port(struct kirin_pcie *pcie,
 				 struct device_node *node)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *parent, *child;
 	int ret, slot, i;
 
-	for_each_available_child_of_node(node, parent) {
-		for_each_available_child_of_node(parent, child) {
+	for_each_available_child_of_node_scoped(node, parent) {
+		for_each_available_child_of_node_scoped(parent, child) {
 			i = pcie->num_slots;
 
-			pcie->gpio_id_reset[i] = of_get_named_gpio(child,
-							"reset-gpios", 0);
-			if (pcie->gpio_id_reset[i] < 0)
-				continue;
+			pcie->id_reset_gpio[i] = devm_fwnode_gpiod_get_index(dev,
+							 of_fwnode_handle(child),
+							 "reset", 0, GPIOD_OUT_LOW,
+							 NULL);
+			if (IS_ERR(pcie->id_reset_gpio[i])) {
+				if (PTR_ERR(pcie->id_reset_gpio[i]) == -ENOENT)
+					continue;
+				return dev_err_probe(dev, PTR_ERR(pcie->id_reset_gpio[i]),
+						     "unable to get a valid reset gpio\n");
+			}
 
 			pcie->num_slots++;
 			if (pcie->num_slots > MAX_PCI_SLOTS) {
 				dev_err(dev, "Too many PCI slots!\n");
-				ret = -EINVAL;
-				goto put_node;
+				return -EINVAL;
 			}
 
 			ret = of_pci_get_devfn(child);
 			if (ret < 0) {
 				dev_err(dev, "failed to parse devfn: %d\n", ret);
-				goto put_node;
+				return ret;
 			}
 
 			slot = PCI_SLOT(ret);
 
 			pcie->reset_names[i] = devm_kasprintf(dev, GFP_KERNEL,
 							      "pcie_perst_%d",
 							      slot);
-			if (!pcie->reset_names[i]) {
-				ret = -ENOMEM;
-				goto put_node;
-			}
+			if (!pcie->reset_names[i])
+				return -ENOMEM;
+
+			gpiod_set_consumer_name(pcie->id_reset_gpio[i],
+						pcie->reset_names[i]);
 		}
 	}
 
 	return 0;
-
-put_node:
-	of_node_put(child);
-	of_node_put(parent);
-	return ret;
 }
 
 static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
@@ -463,14 +466,11 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 		return PTR_ERR(kirin_pcie->apb);
 
 	/* pcie internal PERST# gpio */
-	kirin_pcie->gpio_id_dwc_perst = of_get_named_gpio(dev->of_node,
-							  "reset-gpios", 0);
-	if (kirin_pcie->gpio_id_dwc_perst == -EPROBE_DEFER) {
-		return -EPROBE_DEFER;
-	} else if (!gpio_is_valid(kirin_pcie->gpio_id_dwc_perst)) {
-		dev_err(dev, "unable to get a valid gpio pin\n");
-		return -ENODEV;
-	}
+	kirin_pcie->id_dwc_perst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(kirin_pcie->id_dwc_perst_gpio))
+		return dev_err_probe(dev, PTR_ERR(kirin_pcie->id_dwc_perst_gpio),
+				     "unable to get a valid gpio pin\n");
+	gpiod_set_consumer_name(kirin_pcie->id_dwc_perst_gpio, "pcie_perst_bridge");
 
 	ret = kirin_pcie_get_gpio_enable(kirin_pcie, pdev);
 	if (ret)
@@ -553,7 +553,7 @@ static int kirin_pcie_add_bus(struct pci_bus *bus)
 
 	/* Send PERST# to each slot */
 	for (i = 0; i < kirin_pcie->num_slots; i++) {
-		ret = gpio_direction_output(kirin_pcie->gpio_id_reset[i], 1);
+		ret = gpiod_direction_output_raw(kirin_pcie->id_reset_gpio[i], 1);
 		if (ret) {
 			dev_err(pci->dev, "PERST# %s error: %d\n",
 				kirin_pcie->reset_names[i], ret);
@@ -623,44 +623,6 @@ static int kirin_pcie_host_init(struct dw_pcie_rp *pp)
 	return 0;
 }
 
-static int kirin_pcie_gpio_request(struct kirin_pcie *kirin_pcie,
-				   struct device *dev)
-{
-	int ret, i;
-
-	for (i = 0; i < kirin_pcie->num_slots; i++) {
-		if (!gpio_is_valid(kirin_pcie->gpio_id_reset[i])) {
-			dev_err(dev, "unable to get a valid %s gpio\n",
-				kirin_pcie->reset_names[i]);
-			return -ENODEV;
-		}
-
-		ret = devm_gpio_request(dev, kirin_pcie->gpio_id_reset[i],
-					kirin_pcie->reset_names[i]);
-		if (ret)
-			return ret;
-	}
-
-	for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++) {
-		if (!gpio_is_valid(kirin_pcie->gpio_id_clkreq[i])) {
-			dev_err(dev, "unable to get a valid %s gpio\n",
-				kirin_pcie->clkreq_names[i]);
-			return -ENODEV;
-		}
-
-		ret = devm_gpio_request(dev, kirin_pcie->gpio_id_clkreq[i],
-					kirin_pcie->clkreq_names[i]);
-		if (ret)
-			return ret;
-
-		ret = gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 0);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
 static const struct dw_pcie_ops kirin_dw_pcie_ops = {
 	.read_dbi = kirin_pcie_read_dbi,
 	.write_dbi = kirin_pcie_write_dbi,
@@ -680,7 +642,7 @@ static int kirin_pcie_power_off(struct kirin_pcie *kirin_pcie)
 		return hi3660_pcie_phy_power_off(kirin_pcie);
 
 	for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++)
-		gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 1);
+		gpiod_direction_output_raw(kirin_pcie->id_clkreq_gpio[i], 1);
 
 	phy_power_off(kirin_pcie->phy);
 	phy_exit(kirin_pcie->phy);
@@ -707,10 +669,6 @@ static int kirin_pcie_power_on(struct platform_device *pdev,
 		if (IS_ERR(kirin_pcie->phy))
 			return PTR_ERR(kirin_pcie->phy);
 
-		ret = kirin_pcie_gpio_request(kirin_pcie, dev);
-		if (ret)
-			return ret;
-
 		ret = phy_init(kirin_pcie->phy);
 		if (ret)
 			goto err;
@@ -723,11 +681,9 @@ static int kirin_pcie_power_on(struct platform_device *pdev,
 	/* perst assert Endpoint */
 	usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);
 
-	if (!gpio_request(kirin_pcie->gpio_id_dwc_perst, "pcie_perst_bridge")) {
-		ret = gpio_direction_output(kirin_pcie->gpio_id_dwc_perst, 1);
-		if (ret)
-			goto err;
-	}
+	ret = gpiod_direction_output_raw(kirin_pcie->id_dwc_perst_gpio, 1);
+	if (ret)
+		goto err;
 
 	usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
 

drivers/pci/controller/dwc/pcie-qcom.c

@@ -20,7 +20,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/pci.h>
 #include <linux/pm_runtime.h>
 #include <linux/platform_device.h>

drivers/pci/controller/dwc/pcie-tegra194.c

@@ -13,15 +13,13 @@
 #include <linux/clk.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/interconnect.h>
 #include <linux/interrupt.h>
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_pci.h>
 #include <linux/pci.h>
 #include <linux/phy/phy.h>

drivers/pci/controller/pci-aardvark.c

@@ -23,7 +23,6 @@
 #include <linux/platform_device.h>
 #include <linux/msi.h>
 #include <linux/of_address.h>
-#include <linux/of_gpio.h>
 #include <linux/of_pci.h>
 
 #include "../pci.h"