dt-bindings: phy: rockchip: add PCIe v3 phy

Add a new binding file for Rockchip PCIe v3 phy driver.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220825193836.54262-2-linux@fw-web.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/Documentation/devicetree/bindings/phy/rockchip,pcie3-phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,pcie3-phy.yaml
new file mode 100644 (file)
index 0000000..9f2d8d2
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/rockchip,pcie3-phy.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/rockchip,pcie3-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip PCIe v3 phy
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3568-pcie3-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 3
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: refclk_m
+      - const: refclk_n
+      - const: pclk
+
+  data-lanes:
+    description: which lanes (by position) should be mapped to which
+      controller (value). 0 means lane disabled, higher value means used.
+      (controller-number +1 )
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 16
+    items:
+      minimum: 0
+      maximum: 16
+
+  "#phy-cells":
+    const: 0
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: phy
+
+  rockchip,phy-grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to the syscon managing the phy "general register files"
+
+  rockchip,pipe-grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to the syscon managing the pipe "general register files"
+
+required:
+  - compatible
+  - reg
+  - rockchip,phy-grf
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3568-cru.h>
+    pcie30phy: phy@fe8c0000 {
+      compatible = "rockchip,rk3568-pcie3-phy";
+      reg = <0xfe8c0000 0x20000>;
+      #phy-cells = <0>;
+      clocks = <&pmucru CLK_PCIE30PHY_REF_M>,
+               <&pmucru CLK_PCIE30PHY_REF_N>,
+               <&cru PCLK_PCIE30PHY>;
+      clock-names = "refclk_m", "refclk_n", "pclk";
+      resets = <&cru SRST_PCIE30PHY>;
+      reset-names = "phy";
+      rockchip,phy-grf = <&pcie30_phy_grf>;
+    };