PCI: rcar: Add gen2 device tree support
Add device tree probing support to the 'pci-rcar-gen2' driver.
[Sergei: numerous fixes/cleanups/additions]
[bhelgaas: whitespace fix]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c
index 4fe349d..3ef854f 100644
--- a/drivers/pci/host/pci-rcar-gen2.c
+++ b/drivers/pci/host/pci-rcar-gen2.c
@@ -99,6 +99,7 @@
struct resource io_res;
struct resource mem_res;
struct resource *cfg_res;
+ unsigned busnr;
int irq;
unsigned long window_size;
};
@@ -318,8 +319,8 @@
pci_add_resource(&sys->resources, &priv->io_res);
pci_add_resource(&sys->resources, &priv->mem_res);
- /* Setup bus number based on platform device id */
- sys->busnr = to_platform_device(priv->dev)->id;
+ /* Setup bus number based on platform device id / of bus-range */
+ sys->busnr = priv->busnr;
return 1;
}
@@ -372,6 +373,23 @@
priv->window_size = SZ_1G;
+ if (pdev->dev.of_node) {
+ struct resource busnr;
+ int ret;
+
+ ret = of_pci_parse_bus_range(pdev->dev.of_node, &busnr);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to parse bus-range\n");
+ return ret;
+ }
+
+ priv->busnr = busnr.start;
+ if (busnr.end != busnr.start)
+ dev_warn(&pdev->dev, "only one bus number supported\n");
+ } else {
+ priv->busnr = pdev->id;
+ }
+
hw_private[0] = priv;
memset(&hw, 0, sizeof(hw));
hw.nr_controllers = ARRAY_SIZE(hw_private);
@@ -383,11 +401,20 @@
return 0;
}
+static struct of_device_id rcar_pci_of_match[] = {
+ { .compatible = "renesas,pci-r8a7790", },
+ { .compatible = "renesas,pci-r8a7791", },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, rcar_pci_of_match);
+
static struct platform_driver rcar_pci_driver = {
.driver = {
.name = "pci-rcar-gen2",
.owner = THIS_MODULE,
.suppress_bind_attrs = true,
+ .of_match_table = rcar_pci_of_match,
},
.probe = rcar_pci_probe,
};