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From:   Vidya Sagar <vidyas@nvidia.com>
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Subject: [PATCH V8 10/15] dt-bindings: PHY: P2U: Add Tegra194 P2U block
Date:   Sun, 26 May 2019 10:07:46 +0530
Message-ID: <20190526043751.12729-11-vidyas@nvidia.com>
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Add support for Tegra194 P2U (PIPE to UPHY) module block which is a glue
module instantiated one for each PCIe lane between Synopsys DesignWare core
based PCIe IP and Universal PHY block.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Thierry Reding <treding@nvidia.com>
---
Changes since [v7]:
* None

Changes since [v6]:
* None

Changes since [v5]:
* Added Sob
* Changed node name from "p2u@xxxxxxxx" to "phy@xxxxxxxx"

Changes since [v4]:
* None

Changes since [v3]:
* None

Changes since [v2]:
* Changed node label to reflect new format that includes either 'hsio' or
  'nvhs' in its name to reflect which UPHY brick they belong to

Changes since [v1]:
* This is a new patch in v2 series

 .../bindings/phy/phy-tegra194-p2u.txt         | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt

diff --git a/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
new file mode 100644
index 000000000000..d23ff90baad5
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
@@ -0,0 +1,28 @@
+NVIDIA Tegra194 P2U binding
+
+Tegra194 has two PHY bricks namely HSIO (High Speed IO) and NVHS (NVIDIA High
+Speed) each interfacing with 12 and 8 P2U instances respectively.
+A P2U instance is a glue logic between Synopsys DesignWare Core PCIe IP's PIPE
+interface and PHY of HSIO/NVHS bricks. Each P2U instance represents one PCIe
+lane.
+
+Required properties:
+- compatible: For Tegra19x, must contain "nvidia,tegra194-p2u".
+- reg: Should be the physical address space and length of respective each P2U
+       instance.
+- reg-names: Must include the entry "ctl".
+
+Required properties for PHY port node:
+- #phy-cells: Defined by generic PHY bindings.  Must be 0.
+
+Refer to phy/phy-bindings.txt for the generic PHY binding properties.
+
+Example:
+
+p2u_hsio_0: phy@3e10000 {
+	compatible = "nvidia,tegra194-p2u";
+	reg = <0x03e10000 0x10000>;
+	reg-names = "ctl";
+
+	#phy-cells = <0>;
+};
-- 
2.17.1