ASoC: dt-bindings: move LPASS dai related bindings out of q6afe

q6afe (Audio Front End) is one of the DSP service that handles both
LPASS (Low Power Audio SubSystem) Audio ports and LPASS clocks.
As LPASS is a hardwware IP and commonly used by Qualcomm Audio DSP.
In order to allow  multiple DSP frameworks to use these bindings
its best to move it out from the dsp specific bindings.

For compatibility reasons and not breaking which is already working
we still maintain same compatible string "qcom,q6afe-dais"

Also as part of this change convert these LPASS dai related bindings
into yaml format.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211026111655.1702-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/qcom,q6dsp-lpass-ports.yaml b/Documentation/devicetree/bindings/sound/qcom,q6dsp-lpass-ports.yaml
new file mode 100644
index 000000000000..e6148c17419b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,q6dsp-lpass-ports.yaml
@@ -0,0 +1,178 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/sound/qcom,q6dsp-lpass-ports.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm DSP LPASS(Low Power Audio SubSystem) Audio Ports binding
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  This binding describes the Qualcomm DSP LPASS Audio ports
+
+properties:
+  compatible:
+    enum:
+      - qcom,q6afe-dais
+
+  reg:
+    maxItems: 1
+
+  '#sound-dai-cells':
+    const: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+#Digital Audio Interfaces
+patternProperties:
+  '^dai@[0-9]+$':
+    type: object
+    description:
+      Q6DSP Digital Audio Interfaces.
+
+    properties:
+      reg:
+        description:
+          Digital Audio Interface ID
+
+      qcom,sd-lines:
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        description:
+          List of serial data lines used by this dai.should be one or more of the 0-3 sd lines.
+        minItems: 1
+        maxItems: 4
+        uniqueItems: true
+        items:
+          minimum: 0
+          maximum: 3
+
+      qcom,tdm-sync-mode:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1, 2]
+        description:
+          TDM Synchronization mode
+            0 = Short sync bit mode
+            1 = Long sync mode
+            2 = Short sync slot mode
+
+      qcom,tdm-sync-src:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        description:
+          TDM Synchronization source
+            0 = External source
+            1 = Internal source
+
+      qcom,tdm-data-out:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        description:
+          TDM Data out signal to drive with other masters
+            0 = Disable
+            1 = Enable
+
+      qcom,tdm-invert-sync:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        description:
+          TDM Invert the sync
+            0 = Normal
+            1 = Invert
+
+      qcom,tdm-data-delay:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1, 2]
+        description:
+          TDM Number of bit clock to delay data
+            0 = 0 bit clock cycle
+            1 = 1 bit clock cycle
+            2 = 2 bit clock cycle
+
+      qcom,tdm-data-align:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        description:
+          Indicate how data is packed within the slot. For example, 32 slot
+          width in case of sample bit width is 24TDM Invert the sync.
+            0 = MSB
+            1 = LSB
+
+    required:
+      - reg
+
+    allOf:
+      - if:
+          properties:
+            reg:
+              contains:
+                # TDM DAI ID range from PRIMARY_TDM_RX_0 - QUINARY_TDM_TX_7
+                items:
+                  minimum: 24
+                  maximum: 103
+        then:
+          required:
+            - qcom,tdm-sync-mode
+            - qcom,tdm-sync-src
+            - qcom,tdm-data-out
+            - qcom,tdm-invert-sync
+            - qcom,tdm-data-delay
+            - qcom,tdm-data-align
+
+      - if:
+          properties:
+            reg:
+              contains:
+                # MI2S DAI ID range PRIMARY_MI2S_RX - QUATERNARY_MI2S_TX and
+                # QUINARY_MI2S_RX - QUINARY_MI2S_TX
+                items:
+                  oneOf:
+                    - minimum: 16
+                      maximum: 23
+                    - minimum: 127
+                      maximum: 128
+        then:
+          required:
+            - qcom,sd-lines
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/qcom,apr.h>
+    #include <dt-bindings/sound/qcom,q6afe.h>
+    apr {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        apr-service@4 {
+            reg = <APR_SVC_AFE>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            q6afedai@1 {
+              compatible = "qcom,q6afe-dais";
+              reg = <1>;
+              #address-cells = <1>;
+              #size-cells = <0>;
+              #sound-dai-cells = <1>;
+
+              dai@22 {
+                reg = <QUATERNARY_MI2S_RX>;
+                qcom,sd-lines = <0 1 2 3>;
+              };
+            };
+        };
+      };