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[v2,03/16] dt-bindings: clock: Document FSD CMU bindings

Message ID 20220118144851.69537-4-alim.akhtar@samsung.com
State Superseded
Headers show
Series Add support for Tesla Full Self-Driving (FSD) SoC | expand

Commit Message

Alim Akhtar Jan. 18, 2022, 2:48 p.m. UTC 
Add dt-schema documentation for Tesla FSD SoC clock controller.

Cc: linux-fsd@tesla.com
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
 .../bindings/clock/tesla,fsd-clock.yaml       | 198 ++++++++++++++++++
 1 file changed, 198 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/tesla,fsd-clock.yaml
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Patch

diff --git a/Documentation/devicetree/bindings/clock/tesla,fsd-clock.yaml b/Documentation/devicetree/bindings/clock/tesla,fsd-clock.yaml
new file mode 100644
index 000000000000..dc808e2f8327
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/tesla,fsd-clock.yaml
@@ -0,0 +1,198 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/tesla,fsd-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Tesla FSD (Full Self-Driving) SoC clock controller
+
+maintainers:
+  - Alim Akhtar <alim.akhtar@samsung.com>
+  - linux-fsd@tesla.com
+
+description: |
+  FSD clock controller consist of several clock management unit
+  (CMU), which generates clocks for various inteernal SoC blocks.
+  The root clock comes from external OSC clock (24 MHz).
+
+  All available clocks are defined as preprocessor macros in
+  'dt-bindings/clock/fsd-clk.h' header.
+
+properties:
+  compatible:
+    enum:
+      - tesla,fsd-clock-cmu
+      - tesla,fsd-clock-imem
+      - tesla,fsd-clock-peric
+      - tesla,fsd-clock-fsys0
+      - tesla,fsd-clock-fsys1
+      - tesla,fsd-clock-mfc
+      - tesla,fsd-clock-cam_csi
+
+  clocks:
+    minItems: 1
+    maxItems: 6
+
+  clock-names:
+    minItems: 1
+    maxItems: 6
+
+  "#clock-cells":
+    const: 1
+
+  reg:
+    maxItems: 1
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-cmu
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+        clock-names:
+          items:
+            - const: fin_pll
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-imem
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+            - description: IMEM TCU clock (from CMU_CMU)
+            - description: IMEM bus clock (from CMU_CMU)
+            - description: IMEM DMA clock (from CMU_CMU)
+        clock-names:
+          items:
+            - const: fin_pll
+            - const: dout_cmu_imem_tcuclk
+            - const: dout_cmu_imem_aclk
+            - const: dout_cmu_imem_dmaclk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-peric
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+            - description: Shared0 PLL div4 clock (from CMU_CMU)
+            - description: PERIC shared1 div36 clock (from CMU_CMU)
+            - description: PERIC shared0 div3 TBU clock (from CMU_CMU)
+            - description: PERIC shared0 div20 clock (from CMU_CMU)
+            - description: PERIC shared1 div4 DMAclock (from CMU_CMU)
+        clock-names:
+          items:
+            - const: fin_pll
+            - const: dout_cmu_pll_shared0_div4
+            - const: dout_cmu_peric_shared1div36
+            - const: dout_cmu_peric_shared0div3_tbuclk
+            - const: dout_cmu_peric_shared0div20
+            - const: dout_cmu_peric_shared1div4_dmaclk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-fsys0
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+            - description: Shared0 PLL div6 clock (from CMU_CMU)
+            - description: FSYS0 shared1 div4 clock (from CMU_CMU)
+            - description: FSYS0 shared0 div4 clock (from CMU_CMU)
+        clock-names:
+          items:
+            - const: fin_pll
+            - const: dout_cmu_pll_shared0_div6
+            - const: dout_cmu_fsys0_shared1div4
+            - const: dout_cmu_fsys0_shared0div4
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-fsys1
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+            - description: FSYS1 shared0 div8 clock (from CMU_CMU)
+            - description: FSYS1 shared0 div4 clock (from CMU_CMU)
+        clock-names:
+          items:
+            - const: fin_pll
+            - const: dout_cmu_fsys1_shared0div8
+            - const: dout_cmu_fsys1_shared0div4
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-mfc
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+        clock-names:
+          items:
+            - const: fin_pll
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: tesla,fsd-clock-cam_csi
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (24 MHz)
+        clock-names:
+          items:
+            - const: fin_pll
+
+required:
+  - compatible
+  - "#clock-cells"
+  - clocks
+  - clock-names
+  - reg
+
+additionalProperties: false
+
+examples:
+  # Clock controller node for CMU_FSYS1
+  - |
+    #include <dt-bindings/clock/fsd-clk.h>
+
+    clock_fsys1: clock-controller@16810000 {
+          compatible = "tesla,fsd-clock-fsys1";
+          reg = <0x16810000 0x3000>;
+          #clock-cells = <1>;
+
+          clocks = <&fin_pll>,
+                   <&clock_cmu DOUT_CMU_FSYS1_SHARED0DIV8>,
+                   <&clock_cmu DOUT_CMU_FSYS1_SHARED0DIV4>;
+          clock-names = "fin_pll",
+                        "dout_cmu_fsys1_shared0div8",
+                        "dout_cmu_fsys1_shared0div4";
+    };
+
+...