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[v3,1/2] dt-bindings: PCI: Add UniPhier PCIe endpoint controller description

Message ID 1584956454-8829-2-git-send-email-hayashi.kunihiko@socionext.com
State New
Headers show
Series [v3,1/2] dt-bindings: PCI: Add UniPhier PCIe endpoint controller description | expand

Commit Message

Kunihiko Hayashi March 23, 2020, 9:40 a.m. UTC 
Add DT bindings for PCIe controller implemented in UniPhier SoCs
when configured in endpoint mode. This controller is based on
the DesignWare PCIe core.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/pci/uniphier-pcie-ep.txt   | 53 ++++++++++++++++++++++
 MAINTAINERS                                        |  2 +-
 2 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie-ep.txt
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Patch

diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie-ep.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie-ep.txt
new file mode 100644
index 0000000..072dc78
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/uniphier-pcie-ep.txt
@@ -0,0 +1,53 @@ 
+Socionext UniPhier PCIe endpoint controller bindings
+
+This describes the devicetree bindings for PCIe endpoint controller
+implemented on Socionext UniPhier SoCs.
+
+UniPhier PCIe endpoint controller is based on the Synopsys DesignWare
+PCI core. It shares common functions with the PCIe DesignWare core driver
+and inherits common properties defined in
+Documentation/devicetree/bindings/pci/designware-pcie.txt.
+
+Required properties:
+- compatible: Should be
+	"socionext,uniphier-pro5-pcie-ep" for Pro5 SoC
+- reg: Specifies offset and length of the register set for the device.
+	According to the reg-names, appropriate register sets are required.
+- reg-names: Must include the following entries:
+	"dbi"        - controller configuration registers
+	"dbi2"       - controller configuration registers for shadow
+	"link"       - SoC-specific glue layer registers
+	"addr_space" - PCIe configuration space
+- clocks: A phandle to the clock gate for PCIe glue layer including
+	the endpoint controller.
+- clock-names: Should contain the following:
+	"gio", "link" - for Pro5 SoC
+- resets: A phandle to the reset line for PCIe glue layer including
+	the endpoint controller.
+- reset-names: Should contain the following:
+	"gio", "link" - for Pro5 SoC
+
+Optional properties:
+- phys: A phandle to generic PCIe PHY. According to the phy-names, appropriate
+	phys are required.
+- phy-names: Must be "pcie-phy".
+
+Example:
+
+	pcie_ep: pcie-ep@66000000 {
+		compatible = "socionext,uniphier-pro5-pcie-ep",
+			     "snps,dw-pcie-ep";
+		status = "disabled";
+		reg-names = "dbi", "dbi2", "link", "addr_space";
+		reg = <0x66000000 0x1000>, <0x66001000 0x1000>,
+		      <0x66010000 0x10000>, <0x67000000 0x400000>;
+		clock-names = "gio", "link";
+		clocks = <&sys_clk 12>, <&sys_clk 24>;
+		reset-names = "gio", "link";
+		clocks = <&sys_rst 12>, <&sys_rst 24>;
+		num-ib-windows = <16>;
+		num-ob-windows = <16>;
+		num-lanes = <4>;
+		phy-names = "pcie-phy";
+		phys = <&pcie_phy>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 50e8b90..01a4631 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13151,7 +13151,7 @@  PCIE DRIVER FOR SOCIONEXT UNIPHIER
 M:	Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
 L:	linux-pci@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/pci/uniphier-pcie.txt
+F:	Documentation/devicetree/bindings/pci/uniphier-pcie*.txt
 F:	drivers/pci/controller/dwc/pcie-uniphier.c
 
 PCIE DRIVER FOR ST SPEAR13XX