[05/10] dt-bindings: soc: fsl: cpm_qe: Add QMC controller

Commit Message

Herve Codina Jan. 6, 2023, 1:29 p.m. UTC

Add support for the QMC (QUICC Multichannel Controller)
available in some PowerQUICC SoC such as MPC885 or MPC866.

Signed-off-by: Herve Codina <[e-mail]>
---
 .../bindings/soc/fsl/cpm_qe/fsl,qmc.yaml      | 167 ++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qmc.yaml

Patch

diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qmc.yaml b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qmc.yaml
new file mode 100644
index 000000000000..caf71f3a3f3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qmc.yaml
@@ -0,0 +1,167 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/fsl/cpm_qe/fsl,qmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PowerQUICC CPM QUICC Multichannel Controller (QMC)
+
+maintainers:
+  - Herve Codina <[e-mail]>
+
+description: |
+  The QMC (QUICC Multichannel Controller) emulates up to 64 channels within
+  one serial controller using the same TDM physical interface routed from
+  TSA.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - fsl,mpc885-scc-qmc
+          - fsl,mpc866-scc-qmc
+      - const: fsl,cpm1-scc-qmc
+
+  reg:
+    items:
+      - description: SCC (Serial communication controller) register base
+      - description: SCC parameter ram base
+      - description: Dual port ram base
+
+  reg-names:
+    items:
+      - const: scc_regs
+      - const: scc_pram
+      - const: dpram
+
+  interrupts:
+    description: SCC interrupt line in the CPM interrupt controller
+
+  fsl,cpm-command:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Cf. soc/fsl/cpm_qe/cpm.txt
+
+  tsa:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to the TSA
+
+  tsa-cell-id:
+    enum: [1, 2, 3]
+    description: |
+      TSA cell ID (dt-bindings/soc/fsl-tsa.h defines these values)
+       - 1: SCC2
+       - 2: SCC3
+       - 3: SCC4
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  '#chan-cells':
+    const: 1
+
+patternProperties:
+  "^channel@([0-9]|[1-5][0-9]|6[0-3])$":
+    description:
+      A channel managed by this controller
+    type: object
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 63
+        description:
+          The channel number
+
+      fsl,mode:
+        $ref: /schemas/types.yaml#/definitions/string
+        enum: [transparent, hdlc]
+        default: transparent
+        description: Operational mode
+
+      fsl,reverse-data:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description:
+          The bit order as seen on the channels is reversed,
+          transmitting/receiving the MSB of each octet first.
+          This flag is used only in 'transparent' mode.
+
+      tx-ts-mask:
+        $ref: /schemas/types.yaml#/definitions/uint64
+        description:
+          Channel assigned Tx time-slots within the Tx time-slots routed
+          by the TSA to this cell.
+
+      rx-ts-mask:
+        $ref: /schemas/types.yaml#/definitions/uint64
+        description:
+          Channel assigned Rx time-slots within the Rx time-slots routed
+          by the TSA to this cell.
+
+    required:
+      - reg
+      - tx-ts-mask
+      - rx-ts-mask
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - tsa
+  - tsa-cell-id
+  - '#address-cells'
+  - '#size-cells'
+  - '#chan-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/fsl-tsa.h>
+
+    scc_qmc@a60 {
+        compatible = "fsl,mpc885-scc-qmc", "fsl,cpm1-scc-qmc";
+        reg = <0xa60 0x20>,
+              <0x3f00 0xc0>,
+              <0x2000 0x1000>;
+        reg-names = "scc_regs", "scc_pram", "dpram";
+        interrupts = <27>;
+        interrupt-parent = <&CPM_PIC>;
+        fsl,cpm-command = <0xc0>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+        #chan-cells = <1>;
+
+        tsa = <&tsa>;
+        tsa-cell-id = <FSL_CPM_TSA_SCC4>;
+
+        channel@16 {
+            /* Ch16 : First 4 even TS from all routed from TSA */
+            reg = <16>;
+            fsl,mode = "transparent";
+            fsl,reverse-data;
+            tx-ts-mask = <0x00000000 0x000000AA>;
+            rx-ts-mask = <0x00000000 0x000000AA>;
+        };
+
+        channel@17 {
+            /* Ch17 : First 4 odd TS from all routed from TSA */
+            reg = <17>;
+            fsl,mode = "transparent";
+            fsl,reverse-data;
+            tx-ts-mask = <0x00000000 0x00000055>;
+            rx-ts-mask = <0x00000000 0x00000055>;
+        };
+
+        channel@19 {
+            /* Ch19 : 8 TS (TS 8..15) from all routed from TSA */
+            reg = <19>;
+            fsl,mode = "hdlc";
+            tx-ts-mask = <0x00000000 0x0000FF00>;
+            rx-ts-mask = <0x00000000 0x0000FF00>;
+        };
+    };