[v3,06/25] PCI: faraday: Use pci_parse_request_of_pci_ranges()

Commit Message

Rob Herring (Arm) Oct. 28, 2019, 4:32 p.m. UTC

Convert the Faraday 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.

Cc: Lorenzo Pieralisi <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Reviewed-by: Andrew Murray <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>
---
v2:
 - Remove temporary resource list
---
 drivers/pci/controller/pci-ftpci100.c | 51 ++++++---------------------
 1 file changed, 11 insertions(+), 40 deletions(-)

Comments

Linus Walleij Nov. 3, 2019, 7:12 p.m. UTC | #1

On Mon, Oct 28, 2019 at 5:33 PM Rob Herring <[e-mail]> wrote:

> Convert the Faraday 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.
>
> Cc: Lorenzo Pieralisi <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Reviewed-by: Andrew Murray <[e-mail]>
> Signed-off-by: Rob Herring <[e-mail]>
> ---
> v2:
>  - Remove temporary resource list

Acked-by: Linus Walleij <[e-mail]>

Yours,
Linus Walleij

Patch

diff --git a/drivers/pci/controller/pci-ftpci100.c b/drivers/pci/controller/pci-ftpci100.c
index bf5ece5d9291..75603348b88a 100644
--- a/drivers/pci/controller/pci-ftpci100.c
+++ b/drivers/pci/controller/pci-ftpci100.c
@@ -430,10 +430,8 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	const struct faraday_pci_variant *variant =
 		of_device_get_match_data(dev);
 	struct resource *regs;
-	resource_size_t io_base;
 	struct resource_entry *win;
 	struct faraday_pci *p;
-	struct resource *mem;
 	struct resource *io;
 	struct pci_host_bridge *host;
 	struct clk *clk;
@@ -441,7 +439,6 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	unsigned char cur_bus_speed = PCI_SPEED_33MHz;
 	int ret;
 	u32 val;
-	LIST_HEAD(res);
 
 	host = devm_pci_alloc_host_bridge(dev, sizeof(*p));
 	if (!host)
@@ -480,44 +477,20 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	if (IS_ERR(p->base))
 		return PTR_ERR(p->base);
 
-	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
-						    &res, &io_base);
+	ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
 	if (ret)
 		return ret;
 
-	ret = devm_request_pci_bus_resources(dev, &res);
-	if (ret)
-		return ret;
-
-	/* Get the I/O and memory ranges from DT */
-	resource_list_for_each_entry(win, &res) {
-		switch (resource_type(win->res)) {
-		case IORESOURCE_IO:
-			io = win->res;
-			io->name = "Gemini PCI I/O";
-			if (!faraday_res_to_memcfg(io->start - win->offset,
-						   resource_size(io), &val)) {
-				/* setup I/O space size */
-				writel(val, p->base + PCI_IOSIZE);
-			} else {
-				dev_err(dev, "illegal IO mem size\n");
-				return -EINVAL;
-			}
-			ret = devm_pci_remap_iospace(dev, io, io_base);
-			if (ret) {
-				dev_warn(dev, "error %d: failed to map resource %pR\n",
-					 ret, io);
-				continue;
-			}
-			break;
-		case IORESOURCE_MEM:
-			mem = win->res;
-			mem->name = "Gemini PCI MEM";
-			break;
-		case IORESOURCE_BUS:
-			break;
-		default:
-			break;
+	win = resource_list_first_type(&host->windows, IORESOURCE_IO);
+	if (win) {
+		io = win->res;
+		if (!faraday_res_to_memcfg(io->start - win->offset,
+					   resource_size(io), &val)) {
+			/* setup I/O space size */
+			writel(val, p->base + PCI_IOSIZE);
+		} else {
+			dev_err(dev, "illegal IO mem size\n");
+			return -EINVAL;
 		}
 	}
 
@@ -569,7 +542,6 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	list_splice_init(&res, &host->windows);
 	ret = pci_scan_root_bus_bridge(host);
 	if (ret) {
 		dev_err(dev, "failed to scan host: %d\n", ret);
@@ -581,7 +553,6 @@  static int faraday_pci_probe(struct platform_device *pdev)
 
 	pci_bus_assign_resources(p->bus);
 	pci_bus_add_devices(p->bus);
-	pci_free_resource_list(&res);
 
 	return 0;
 }