PCI: rockchip: Use pci_parse_request_of_pci_ranges()

Convert the Rockchip host bridge to use the common
pci_parse_request_of_pci_ranges().

There's no need to assign the resources to a temporary list first. Just
use bridge->windows directly and remove all the temporary list handling.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Andrew Murray <andrew.murray@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: linux-rockchip@lists.infradead.org

drivers/pci/controller/pcie-rockchip-host.c

@@ -950,14 +950,10 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct pci_bus *bus, *child;
 	struct pci_host_bridge *bridge;
+	struct resource *bus_res;
 	struct resource_entry *win;
-	resource_size_t io_base;
-	struct resource	*mem;
-	struct resource	*io;
 	int err;
 
-	LIST_HEAD(res);
-
 	if (!dev->of_node)
 		return -ENODEV;
 
@@ -995,29 +991,20 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 	if (err < 0)
 		goto err_deinit_port;
 
-	err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
+	err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, &bus_res);
-						    &res, &io_base);
 	if (err)
 		goto err_remove_irq_domain;
 
-	err = devm_request_pci_bus_resources(dev, &res);
+	rockchip->root_bus_nr = bus_res->start;
-	if (err)
-		goto err_free_res;
 
 	/* Get the I/O and memory ranges from DT */
-	resource_list_for_each_entry(win, &res) {
+	resource_list_for_each_entry(win, &bridge->windows) {
 		switch (resource_type(win->res)) {
 		case IORESOURCE_IO:
 			io = win->res;
 			io->name = "I/O";
 			rockchip->io_size = resource_size(io);
 			rockchip->io_bus_addr = io->start - win->offset;
-			err = pci_remap_iospace(io, io_base);
-			if (err) {
-				dev_warn(dev, "error %d: failed to map resource %pR\n",
-					 err, io);
-				continue;
-			}
 			rockchip->io = io;
 			break;
 		case IORESOURCE_MEM:
@@ -1026,9 +1013,6 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 			rockchip->mem_size = resource_size(mem);
 			rockchip->mem_bus_addr = mem->start - win->offset;
 			break;
-		case IORESOURCE_BUS:
-			rockchip->root_bus_nr = win->res->start;
-			break;
 		default:
 			continue;
 		}
@@ -1036,15 +1020,14 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 
 	err = rockchip_pcie_cfg_atu(rockchip);
 	if (err)
-		goto err_unmap_iospace;
+		goto err_remove_irq_domain;
 
 	rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
 	if (!rockchip->msg_region) {
 		err = -ENOMEM;
-		goto err_unmap_iospace;
+		goto err_remove_irq_domain;
 	}
 
-	list_splice_init(&res, &bridge->windows);
 	bridge->dev.parent = dev;
 	bridge->sysdata = rockchip;
 	bridge->busnr = 0;
@@ -1054,7 +1037,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 
 	err = pci_scan_root_bus_bridge(bridge);
 	if (err < 0)
-		goto err_unmap_iospace;
+		goto err_remove_irq_domain;
 
 	bus = bridge->bus;
 
@@ -1068,10 +1051,6 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 	pci_bus_add_devices(bus);
 	return 0;
 
-err_unmap_iospace:
-	pci_unmap_iospace(rockchip->io);
-err_free_res:
-	pci_free_resource_list(&res);
 err_remove_irq_domain:
 	irq_domain_remove(rockchip->irq_domain);
 err_deinit_port:
@@ -1097,7 +1076,6 @@ static int rockchip_pcie_remove(struct platform_device *pdev)
 
 	pci_stop_root_bus(rockchip->root_bus);
 	pci_remove_root_bus(rockchip->root_bus);
-	pci_unmap_iospace(rockchip->io);
 	irq_domain_remove(rockchip->irq_domain);
 
 	rockchip_pcie_deinit_phys(rockchip);