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-rw-r--r--Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt66
-rw-r--r--drivers/pci/host/pci-rcar-gen2.c31
2 files changed, 95 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt b/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt
new file mode 100644
index 000000000000..d8ef5bf50f11
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt
@@ -0,0 +1,66 @@
+Renesas AHB to PCI bridge
+-------------------------
+
+This is the bridge used internally to connect the USB controllers to the
+AHB. There is one bridge instance per USB port connected to the internal
+OHCI and EHCI controllers.
+
+Required properties:
+- compatible: "renesas,pci-r8a7790" for the R8A7790 SoC;
+ "renesas,pci-r8a7791" for the R8A7791 SoC.
+- reg: A list of physical regions to access the device: the first is
+ the operational registers for the OHCI/EHCI controllers and the
+ second is for the bridge configuration and control registers.
+- interrupts: interrupt for the device.
+- clocks: The reference to the device clock.
+- bus-range: The PCI bus number range; as this is a single bus, the range
+ should be specified as the same value twice.
+- #address-cells: must be 3.
+- #size-cells: must be 2.
+- #interrupt-cells: must be 1.
+- interrupt-map: standard property used to define the mapping of the PCI
+ interrupts to the GIC interrupts.
+- interrupt-map-mask: standard property that helps to define the interrupt
+ mapping.
+
+Example SoC configuration:
+
+ pci0: pci@ee090000 {
+ compatible = "renesas,pci-r8a7790";
+ clocks = <&mstp7_clks R8A7790_CLK_EHCI>;
+ reg = <0x0 0xee090000 0x0 0xc00>,
+ <0x0 0xee080000 0x0 0x1100>;
+ interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+
+ bus-range = <0 0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0xff00 0 0 0x7>;
+ interrupt-map = <0x0000 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
+ 0x0800 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
+ 0x1000 0 0 2 &gic 0 108 IRQ_TYPE_LEVEL_HIGH>;
+
+ pci@0,1 {
+ reg = <0x800 0 0 0 0>;
+ device_type = "pci";
+ phys = <&usbphy 0 0>;
+ phy-names = "usb";
+ };
+
+ pci@0,2 {
+ reg = <0x1000 0 0 0 0>;
+ device_type = "pci";
+ phys = <&usbphy 0 0>;
+ phy-names = "usb";
+ };
+ };
+
+Example board setup:
+
+&pci0 {
+ status = "okay";
+ pinctrl-0 = <&usb0_pins>;
+ pinctrl-names = "default";
+};
diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c
index 4fe349dcaf59..3ef854f5a5b5 100644
--- a/drivers/pci/host/pci-rcar-gen2.c
+++ b/drivers/pci/host/pci-rcar-gen2.c
@@ -99,6 +99,7 @@ struct rcar_pci_priv {
struct resource io_res;
struct resource mem_res;
struct resource *cfg_res;
+ unsigned busnr;
int irq;
unsigned long window_size;
};
@@ -318,8 +319,8 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
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 @@ static int rcar_pci_probe(struct platform_device *pdev)
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 @@ static int rcar_pci_probe(struct platform_device *pdev)
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,
};