linux-kernel - [PATCH 1/2] dt-bindings: PCI: meson: add DT bindings for Amlogic Meson PCIe Phy controller

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Date:   Tue, 14 Aug 2018 02:12:13 -0400
From:   Hanjie Lin <hanjie.lin@...ogic.com>
To:     Kishon Vijay Abraham I <kishon@...com>
CC:     Yue Wang <yue.wang@...ogic.com>,
        Hanjie Lin <hanjie.lin@...ogic.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-amlogic@...ts.infradead.org>, <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        "Kevin Hilman" <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>, Rob Herring <robh@...nel.org>,
        <shawn.lin@...k-chips.com>, <devicetree@...r.kernel.org>
Subject: [PATCH 1/2] dt-bindings: PCI: meson: add DT bindings for Amlogic Meson PCIe Phy controller

From: Yue Wang <yue.wang@...ogic.com>

The Meson-PCIE-PHY controller supports the 5-Gbps data rate
of the PCI Express Gen 2 specification and is backwardcompatible
with the 2.5-Gbps Gen 1.1 specification with only
inferred idle detection supported on AMLOGIC SoCs.

Signed-off-by: Hanjie Lin <hanjie.lin@...ogic.com>
Signed-off-by: Yue Wang <yue.wang@...ogic.com>
---
 .../bindings/phy/amlogic,meson-pcie-phy.txt        | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt b/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
new file mode 100644
index 0000000..db99085
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
@@ -0,0 +1,31 @@
+* Amlogic Meson AXG PCIE PHY binding
+
+Required properties:
+- compatible:	Should be
+	- "amlogic,axg-pcie-phy"
+- #phys-cells:	must be 0 (see phy-bindings.txt in this directory)
+- reg:		The base address and length of the registers
+- resets:	phandle to the reset lines
+- reset-names:	must contain "phy" and "peripheral"
+	- "port_a" Port A reset
+	- "port_b" Port B reset
+	- "phy"	PHY reset
+	- "apb"	APB reset
+Optional properties:
+- phy-supply:	see phy-bindings.txt in this directory
+
+Example:
+	pcie_phy: pcie-phy@...44000 {
+		#phy-cells = <0>;
+		compatible = "amlogic,axg-pcie-phy";
+		reg = <0x0 0xff644000 0x0 0x2000>;
+		resets = <&reset RESET_PCIE_A>,
+				<&reset RESET_PCIE_B>,
+				<&reset RESET_PCIE_PHY>,
+				<&reset RESET_PCIE_APB>;
+		reset-names =
+				"port_a",
+				"port_b",
+				"phy",
+				"apb";
+	};
-- 
2.7.4