linux-kernel - [RFC PATCH v4 2/4] dt-bindings: phy: rockchip: Add Naneng combo PHY bindings

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Message-Id: <20211208185449.16763-3-jbx6244@gmail.com>
Date:   Wed,  8 Dec 2021 19:54:47 +0100
From:   Johan Jonker <jbx6244@...il.com>
To:     heiko@...ech.de
Cc:     robh+dt@...nel.org, kishon@...com, vkoul@...nel.org,
        p.zabel@...gutronix.de, yifeng.zhao@...k-chips.com,
        kever.yang@...k-chips.com, cl@...k-chips.com,
        linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v4 2/4] dt-bindings: phy: rockchip: Add Naneng combo PHY bindings

From: Yifeng Zhao <yifeng.zhao@...k-chips.com>

Add the compatible strings for the Naneng combo PHY found on rockchip SoC.

Signed-off-by: Yifeng Zhao <yifeng.zhao@...k-chips.com>
Signed-off-by: Johan Jonker <jbx6244@...il.com>
---

Changed V4:
  restyle
  remove some minItems
  add more properties
  remove reset-names
  move #phy-cells
  add rockchip,rk3568-pipe-grf
  add rockchip,rk3568-pipe-phy-grf
---
 .../phy/phy-rockchip-naneng-combphy.yaml      | 127 ++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml

diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml b/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml
new file mode 100644
index 000000000..d309e2008
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml
@@ -0,0 +1,127 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/phy-rockchip-naneng-combphy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip SoC Naneng Combo Phy Device Tree Bindings
+
+maintainers:
+  - Heiko Stuebner <heiko@...ech.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3568-naneng-combphy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: reference clock
+      - description: apb clock
+      - description: pipe clock
+
+  clock-names:
+    items:
+      - const: ref
+      - const: apb
+      - const: pipe
+
+  resets:
+    items:
+      - description: exclusive apb reset line
+      - description: exclusive PHY reset line
+
+  rockchip,dis-u3otg0-port:
+    type: boolean
+    description:
+      Disable the u3otg0 port.
+
+  rockchip,dis-u3otg1-port:
+    type: boolean
+    description:
+      Disable the u3otg1 port.
+
+  rockchip,enable-ssc:
+    type: boolean
+    description:
+      In U3 and SATA mode the SSC option is already disabled by default.
+      In PCIE mode the option SSC can be enabled.
+      If Spread Spectrum Clocking (SSC) is used it is
+      required that a common reference clock is used by the link partners.
+      Most commercially available platforms with PCIe backplanes use
+      SSC to reduce EMI.
+
+  rockchip,ext-refclk:
+    type: boolean
+    description:
+      Many PCIe connections, especially backplane connections,
+      require a synchronous reference clock between the two link partners.
+      To achieve this a common clock source, referred to as REFCLK in
+      the PCI Express Card Electromechanical Specification,
+      should be used by both ends of the PCIe link.
+      The PCIe PHY provides 100MHz differential clock output
+      (optional with SSC) in RC mode for system applications.
+
+  rockchip,pipe-grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Some additional phy settings are accessed through GRF regs.
+
+  rockchip,pipe-phy-grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Some additional pipe settings are accessed through GRF regs.
+
+  rockchip,sgmii-mac-sel:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+    description:
+      Select gmac0 or gmac1 to be used as SGMII controller.
+
+  "#phy-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - rockchip,pipe-grf
+  - rockchip,pipe-phy-grf
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3568-cru.h>
+
+    pipegrf: syscon@...50000 {
+      compatible = "rockchip,rk3568-pipe-grf", "syscon";
+      reg = <0xfdc50000 0x1000>;
+    };
+
+    pipe_phy_grf0: syscon@...70000 {
+      compatible = "rockchip,rk3568-pipe-phy-grf", "syscon";
+      reg = <0xfdc70000 0x1000>;
+    };
+
+    combphy0: phy@...20000 {
+      compatible = "rockchip,rk3568-naneng-combphy";
+      reg = <0xfe820000 0x100>;
+      clocks = <&pmucru CLK_PCIEPHY0_REF>,
+               <&cru PCLK_PIPEPHY0>,
+               <&cru PCLK_PIPE>;
+      clock-names = "ref", "apb", "pipe";
+      assigned-clocks = <&pmucru CLK_PCIEPHY0_REF>;
+      assigned-clock-rates = <100000000>;
+      resets = <&cru SRST_P_PIPEPHY0>, <&cru SRST_PIPEPHY0>;
+      rockchip,pipe-grf = <&pipegrf>;
+      rockchip,pipe-phy-grf = <&pipe_phy_grf0>;
+      #phy-cells = <1>;
+    };
-- 
2.20.1