linux-kernel - [PATCH v3 2/2] devicetree: bindings: phy: Document ipq806x dwc3 qcom phy

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Date:   Wed, 15 Apr 2020 23:07:27 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Andy Gross <agross@...nel.org>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v3 2/2] devicetree: bindings: phy: Document ipq806x dwc3 qcom phy

Document dwc3 qcom phy hs and ss phy bindings needed to correctly
inizialize and use usb on ipq806x SoC.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
v3:
* Use explicit reg instead of regmap

 .../bindings/phy/qcom,ipq806x-usb-phy-hs.yaml | 58 +++++++++++++++
 .../bindings/phy/qcom,ipq806x-usb-phy-ss.yaml | 70 +++++++++++++++++++
 2 files changed, 128 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-hs.yaml
 create mode 100644 Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-ss.yaml

diff --git a/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-hs.yaml b/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-hs.yaml
new file mode 100644
index 000000000000..c019de7478e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-hs.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,ipq806x-usb-phy-hs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm ipq806x usb DWC3 HS PHY CONTROLLER
+
+maintainers:
+  - Ansuel Smith <ansuelsmth@...il.com>
+
+description:
+  DWC3 PHY nodes are defined to describe on-chip Synopsis Physical layer
+  controllers used in ipq806x. Each DWC3 PHY controller should have its
+  own node.
+
+properties:
+  compatible:
+    const: qcom,ipq806x-usb-phy-hs
+
+  "#phy-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    description: |
+      - "ref" Is required
+      - "xo"	Optional external reference clock
+    items:
+      - const: ref
+      - const: xo
+
+required:
+  - compatible
+  - "#phy-cells"
+  - reg
+  - clocks
+  - clock-names
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-ipq806x.h>
+
+    hs_phy_0: phy@...f8800 {
+      compatible = "qcom,ipq806x-usb-phy-hs";
+      reg = <0x110f8800 0x30>;
+      clocks = <&gcc USB30_0_UTMI_CLK>;
+      clock-names = "ref";
+      #phy-cells = <0>;
+    };
diff --git a/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-ss.yaml b/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-ss.yaml
new file mode 100644
index 000000000000..29a7d3aed289
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom,ipq806x-usb-phy-ss.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,ipq806x-usb-phy-ss.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm ipq806x usb DWC3 SS PHY CONTROLLER
+
+maintainers:
+  - Ansuel Smith <ansuelsmth@...il.com>
+
+description:
+  DWC3 PHY nodes are defined to describe on-chip Synopsis Physical layer
+  controllers used in ipq806x. Each DWC3 PHY controller should have its
+  own node.
+
+properties:
+  compatible:
+    const: qcom,ipq806x-usb-phy-ss
+
+  "#phy-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    description: |
+      - "ref" Is required
+      - "xo"	Optional external reference clock
+    items:
+      - const: ref
+      - const: xo
+
+  rx_eq:
+    maxItems: 1
+    description: Override value for rx_eq. Default is 4.
+
+  tx_deamp_3_5db:
+    maxItems: 1
+    description: Override value for transmit preemphasis. Default is 23.
+
+  mpll:
+    maxItems: 1
+    description: Override value for mpll. Default is 0.
+
+required:
+  - compatible
+  - "#phy-cells"
+  - reg
+  - clocks
+  - clock-names
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-ipq806x.h>
+
+    ss_phy_0: phy@...f8830 {
+      compatible = "qcom,ipq806x-usb-phy-ss";
+      reg = <0x110f8830 0x30>;
+      clocks = <&gcc USB30_0_MASTER_CLK>;
+      clock-names = "ref";
+      #phy-cells = <0>;
+    };
-- 
2.25.1