linux-kernel - [PATCH 2/4] dt-bindings: phy: add imx8 pcie phy driver support

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Message-Id: <1631845863-24249-3-git-send-email-hongxing.zhu@nxp.com>
Date:   Fri, 17 Sep 2021 10:31:01 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     l.stach@...gutronix.de, kishon@...com, vkoul@...nel.org,
        robh@...nel.org, galak@...nel.crashing.org, shawnguo@...nel.org
Cc:     linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, linux-imx@....com,
        Richard Zhu <hongxing.zhu@....com>
Subject: [PATCH 2/4] dt-bindings: phy: add imx8 pcie phy driver support

Add dt-binding for the standalone i.MX8 PCIe PHY driver.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 .../bindings/phy/fsl,imx8-pcie-phy.yaml       | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
new file mode 100644
index 000000000000..2a81a17f1779
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/fsl,imx8-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8 SoC series PCIe PHY Device Tree Bindings
+
+maintainers:
+  - Richard Zhu <hongxing.zhu@....com>
+
+properties:
+  "#phy-cells":
+    const: 0
+
+  compatible:
+    enum:
+      - fsl,imx8mm-pcie-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: PHY module clock
+
+  clock-names:
+    items:
+      - const: phy
+
+  fsl,refclk-pad-mode:
+    description:
+      Specifies the mode of the refclk pad used. It can be NO_USED(PHY
+      refclock is derived from SoC internal source), INPUT(PHY refclock
+      is provided externally via the refclk pad) or OUTPUT(PHY refclock
+      is derived from SoC internal source and provided on the refclk pad).
+      Refer include/dt-bindings/phy/phy-imx8-pcie.h for the constants
+      to be used.
+    enum: [ 0, 1, 2 ]
+
+required:
+  - "#phy-cells"
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - fsl,refclk-pad-mode
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mm-clock.h>
+
+    pcie_phy: pcie-phy@...00000 {
+            compatible = "fsl,imx8mm-pcie-phy";
+            reg = <0x32f00000 0x10000>;
+            clocks = <&clk IMX8MM_CLK_PCIE1_PHY>;
+            clock-names = "phy";
+            assigned-clocks = <&clk IMX8MM_CLK_PCIE1_PHY>;
+            assigned-clock-rates = <100000000>;
+            assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_100M>;
+            fsl,refclk-pad-mode = <1>;
+            #phy-cells = <0>;
+    };
+...
-- 
2.25.1