[PATCH v2 1/9] dt-bindings: phy: Document ST STM32MP25 USB2-FEMTO PHY

[Marek Vasut]

From: Pankaj Dev <pankaj.dev at st.com>

Document USB2 PHY for STM32MP25 USB2 controllers, which includes the
USB2.0 host-only controller and USB 2.0 part of the DWC3 controller.
Two such PHYs in total are present in STM32MP25 SoC, they both are
slightly different, therefore they use different compatible string
to discern them.

Co-developed-by: Pankaj Dev <pankaj.dev at st.com>
Signed-off-by: Pankaj Dev <pankaj.dev at st.com>
Co-developed-by: Rahul Kumar <rahul.kumar05 at st.com>
Signed-off-by: Rahul Kumar <rahul.kumar05 at st.com>
Co-developed-by: Fabrice Gasnier <fabrice.gasnier at foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier at foss.st.com>
Co-developed-by: Clément Le Goffic <clement.legoffic at foss.st.com>
Signed-off-by: Clément Le Goffic <clement.legoffic at foss.st.com>
Signed-off-by: Marek Vasut <marex at nabladev.com>
---
Cc: Alexandre Torgue <alexandre.torgue at foss.st.com>
Cc: Christian Bruel <christian.bruel at foss.st.com>
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Fabrice Gasnier <fabrice.gasnier at foss.st.com>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
Cc: Neil Armstrong <neil.armstrong at linaro.org>
Cc: Pankaj Dev <pankaj.dev at st.com>
Cc: Rahul Kumar <rahul.kumar05 at st.com>
Cc: Rob Herring <robh at kernel.org>
Cc: Rosen Penev <rosenp at gmail.com>
Cc: Thinh Nguyen <Thinh.Nguyen at synopsys.com>
Cc: Vinod Koul <vkoul at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: kernel at dh-electronics.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: linux-phy at lists.infradead.org
Cc: linux-stm32 at st-md-mailman.stormreply.com
Cc: linux-usb at vger.kernel.org
---
V2: - Fix up Sob/Cdb lines
    - Fix up compatible string in example
    - Use additionalProperties: false
    - Expand description:
    - Use clock-cells = <1> to discern OSC and future PLL clock from the PHY
---
 .../bindings/phy/st,stm32-usb2phy.yaml        | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/st,stm32-usb2phy.yaml

diff --git a/Documentation/devicetree/bindings/phy/st,stm32-usb2phy.yaml b/Documentation/devicetree/bindings/phy/st,stm32-usb2phy.yaml
new file mode 100644
index 0000000000000..ab6c943af9a25
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/st,stm32-usb2phy.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/st,stm32-usb2phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 MPU High-Speed USB PHY
+
+description:
+  USB2 PHY block in STM32 is attached to USB 2.0 Host controller and
+  USB 2.0 side of DWC3 DRD controller, and provides the USB LS/FS/HS
+  connectivity. Both PHYs are the FEMTO-PHY, but their configuration
+  bits in the system control register are different for each variant.
+
+maintainers:
+  - Fabrice Gasnier <fabrice.gasnier at foss.st.com>
+  - Marek Vasut <marex at nabladev.com>
+  - Pankaj Dev <pankaj.dev at st.com>
+
+properties:
+  compatible:
+    enum:
+      - st,stm32mp25-usb2phy1
+      - st,stm32mp25-usb2phy2
+
+  "#phy-cells":
+    const: 0
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  vdd33-supply:
+    description: Phandle to regulator providing 3V3 power supply to the USB2 HS PHY
+
+  st,syscfg:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: Phandle to system configuration controller.
+    items:
+      - items:
+          - description: phandle to syscfg
+          - description: USB2PHY control offset within syscfg
+
+  "#clock-cells":
+    const: 1
+
+required:
+  - compatible
+  - "#clock-cells"
+  - "#phy-cells"
+  - clocks
+  - resets
+  - st,syscfg
+  - vdd33-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
+    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
+
+    usb2_phy2: usb-phy {
+        compatible = "st,stm32mp25-usb2phy1";
+        #clock-cells = <1>;
+        #phy-cells = <0>;
+        clocks = <&rcc CK_KER_USB2PHY2>;
+        resets = <&rcc USB2PHY2_R>;
+        st,syscfg = <&syscfg 0x2800>;
+        vdd33-supply = <&vdd33usb>;
+    };
-- 
2.53.0