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[RFC] dt-bindings: phy: Add Qualcomm MIPI C-/D-PHY schema for CSIPHY IPs

Message ID 20250513143918.2572689-1-vladimir.zapolskiy@linaro.org
State New
Headers show
Series [RFC] dt-bindings: phy: Add Qualcomm MIPI C-/D-PHY schema for CSIPHY IPs | expand

Commit Message

Vladimir Zapolskiy May 13, 2025, 2:39 p.m. UTC 
Add dt-binding schema for the CAMSS CSIPHY IPs, which provides
MIPI C-/D-PHY interfaces on Qualcomm SoCs.

Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
---
 .../devicetree/bindings/phy/qcom,csiphy.yaml  | 110 ++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
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Patch

diff --git a/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml b/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
new file mode 100644
index 000000000000..ef712c5442ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
@@ -0,0 +1,110 @@ 
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,csiphy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm CSI PHY
+
+maintainers:
+  - Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
+
+description: |
+  Qualcomm SoCs equipped with a number of MIPI CSI PHY IPs, which
+  supports D-PHY or C-PHY interfaces to camera sensors.
+
+properties:
+  compatible:
+    enum:
+      - qcom,sm8250-csiphy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 1
+
+  vdda-csi-0p9-supply:
+    description: Voltage supply, 0.9V
+
+  vdda-csi-1p2-supply:
+    description: Voltage supply, 1.2V
+
+  '#phy-cells':
+    const: 0
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    description: CAMSS CSIPHY input port
+
+    patternProperties:
+      "^endpoint@[0-1]$":
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            minItems: 1
+            maxItems: 4
+
+          bus-type:
+            enum:
+              - 1 # MEDIA_BUS_TYPE_CSI2_CPHY
+              - 4 # MEDIA_BUS_TYPE_CSI2_DPHY
+
+        required:
+          - data-lanes
+
+    oneOf:
+      - required:
+          - endpoint
+      - required:
+          - endpoint@0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+  - '#phy-cells'
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sm8250-csiphy
+    then:
+      required:
+        - vdda-csi-0p9-supply
+        - vdda-csi-1p2-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,camcc-sm8250.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    phy@ac6e000 {
+      compatible = "qcom,sm8250-csiphy";
+      reg = <0x0ac6e000 0x1000>;
+      clocks = <&camcc CAM_CC_CSIPHY2_CLK>,
+               <&camcc CAM_CC_CSI2PHYTIMER_CLK>;
+      interrupts = <GIC_SPI 479 IRQ_TYPE_EDGE_RISING>;
+      vdda-csi-0p9-supply = <&vreg_l5a_0p88>;
+      vdda-csi-1p2-supply = <&vreg_l9a_1p2>;
+      #phy-cells = <0>;
+
+      port {
+        csiphy_in: endpoint {
+          data-lanes = <1 2 3 4>;
+          remote-endpoint = <&sensor_out>;
+        };
+      };
+    };