[PATCH v4 5/9] dt-bindings: pci: rcar pcie device tree bindings
From: l.stach@pengutronix.de (Lucas Stach)
Date: 2014-03-21 11:23:51
Also in:
linux-devicetree, linux-pci, linux-sh
Am Freitag, den 21.03.2014, 10:32 +0000 schrieb Phil Edworthy:
This patch adds the bindings for the rcar PCIE driver. The driver resides under drivers/pci/host/pcie-rcar.c Signed-off-by: Phil Edworthy <redacted>
I have one question below. If you can answer this with yes after thinking again about it, this is: Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
quoted hunk ↗ jump to hunk
--- Documentation/devicetree/bindings/pci/rcar-pci.txt | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/rcar-pci.txtdiff --git a/Documentation/devicetree/bindings/pci/rcar-pci.txt b/Documentation/devicetree/bindings/pci/rcar-pci.txt new file mode 100644 index 0000000..0e219b0 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/rcar-pci.txt@@ -0,0 +1,40 @@ +* Renesas RCar PCIe interface + +Required properties: +- compatible: should contain one of the following + "renesas,r8a7779-pcie", "renesas,r8a7790-pcie", "renesas,r8a7791-pcie" +- reg: base addresses and lengths of the pcie controller. +- #address-cells: set to <3> +- #size-cells: set to <2> +- device_type: set to "pci" +- ranges: ranges for the PCI memory and I/O regions +- interrupts: interrupt values for MSI interrupt +- #interrupt-cells: set to <1> +- interrupt-map-mask and interrupt-map: standard PCI properties + to define the mapping of the PCIe interface to interrupt + numbers. +- clocks: from common clock binding: handle to pci clock. +- clock-names: from common clock binding: should be "pcie"
You really only have one PCIe clock? So the controller is generating the PCIe bus clock from it's register clock? No need to enable any other clock for PCIe to work?
+
+Example:
+
+SoC specific DT Entry:
+
+ pcie: pcie at 0x01000000 {
+ compatible = "renesas,r8a7790-pcie";
+ reg = <0 0xfe000000 0 0x80000>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = <0x01000000 0 0x00000000 0 0xfe100000 0 0x00100000
+ 0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000
+ 0x02000000 0 0x30000000 0 0x30000000 0 0x08000000
+ 0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
+ interrupts = <0 116 4>;
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0 0 0 0>;
+ interrupt-map = <0 0 0 0 &gic 0 116 4>;
+ clocks = <&mstp3_clks R8A7790_CLK_PCIE>;
+ clock-names = "pcie";
+ status = "disabled";
+ };-- Pengutronix e.K. | Lucas Stach | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-5076 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |