ASoC: dt-bindings: add bindings for pm4125 audio codec

The audio codec IC is found on Qualcomm PM4125/PM2250 PMIC.
It has TX and RX soundwire slave devices hence two files are added.

Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20250915-pm4125_audio_codec_v1-v4-1-b247b64eec52@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/qcom,pm4125-codec.yaml

@@ -0,0 +1,134 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,pm4125-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm PM4125 Audio Codec
+
+maintainers:
+  - Alexey Klimov <alexey.klimov@linaro.org>
+
+description:
+  The audio codec IC found on Qualcomm PM4125/PM2250 PMIC.
+  It has RX and TX Soundwire slave devices.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: qcom,pm4125-codec
+
+  reg:
+    description:
+      Specifies the SPMI base address for the audio codec peripherals. The
+      address space contains reset register needed to power-on the codec.
+    maxItems: 1
+
+  reg-names:
+    maxItems: 1
+
+  vdd-io-supply:
+    description: A reference to the 1.8V I/O supply
+
+  vdd-cp-supply:
+    description: A reference to the charge pump I/O supply
+
+  vdd-mic-bias-supply:
+    description: A reference to the 3.3V mic bias supply
+
+  vdd-pa-vpos-supply:
+    description: A reference to the PA VPOS supply
+
+  qcom,tx-device:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: A reference to Soundwire tx device phandle
+
+  qcom,rx-device:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: A reference to Soundwire rx device phandle
+
+  qcom,micbias1-microvolt:
+    description: micbias1 voltage
+    minimum: 1800000
+    maximum: 2850000
+
+  qcom,micbias2-microvolt:
+    description: micbias2 voltage
+    minimum: 1800000
+    maximum: 2850000
+
+  qcom,micbias3-microvolt:
+    description: micbias3 voltage
+    minimum: 1800000
+    maximum: 2850000
+
+  qcom,mbhc-buttons-vthreshold-microvolt:
+    description:
+      Array of 8 Voltage threshold values corresponding to headset
+      button0 - button7
+    minItems: 8
+    maxItems: 8
+
+  '#sound-dai-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - vdd-io-supply
+  - vdd-cp-supply
+  - vdd-mic-bias-supply
+  - vdd-pa-vpos-supply
+  - qcom,tx-device
+  - qcom,rx-device
+  - qcom,micbias1-microvolt
+  - qcom,micbias2-microvolt
+  - qcom,micbias3-microvolt
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+
+    spmi {
+        #address-cells = <2>;
+        #size-cells = <0>;
+
+        pmic {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            audio-codec@f000 {
+                compatible = "qcom,pm4125-codec";
+                reg = <0xf000>;
+                vdd-io-supply = <&pm4125_l15>;
+                vdd-cp-supply = <&pm4125_s4>;
+                vdd-pa-vpos-supply = <&pm4125_s4>;
+                vdd-mic-bias-supply = <&pm4125_l22>;
+                qcom,micbias1-microvolt = <1800000>;
+                qcom,micbias2-microvolt = <1800000>;
+                qcom,micbias3-microvolt = <1800000>;
+                qcom,rx-device = <&pm4125_rx>;
+                qcom,tx-device = <&pm4125_tx>;
+                #sound-dai-cells = <1>;
+            };
+        };
+    };
+
+    /* ... */
+
+    soundwire@a610000 {
+        reg = <0x0a610000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        pm4125_rx: audio-codec@0,4 {
+            compatible = "sdw20217010c00";
+            reg = <0 4>;
+            qcom,rx-port-mapping = <1 3>;
+        };
+    };
+...

Documentation/devicetree/bindings/sound/qcom,pm4125-sdw.yaml

@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,pm4125-sdw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SoundWire Slave devices on PM4125/PM2250 PMIC audio codec.
+
+maintainers:
+  - Alexey Klimov <alexey.klimov@linaro.org>
+
+description:
+  The audio codec IC found on Qualcomm PM4125/PM2250 PMICs.
+  It has RX and TX Soundwire slave devices.
+
+properties:
+  compatible:
+    const: sdw20217010c00
+
+  reg:
+    maxItems: 1
+
+  qcom,tx-port-mapping:
+    description: |
+      Specifies static port mapping between device and host tx ports.
+      In the order of the device port index which are adc1_port, adc23_port,
+      dmic03_mbhc_port, dmic46_port.
+      Supports maximum 2 tx soundwire ports.
+
+      PM4125 TX Port 1 (ADC1,2 & DMIC0 & MBHC)    <=> SWR0 Port 1
+      PM4125 TX Port 2 (ADC1 & DMIC0,1,2 & MBHC)  <=> SWR0 Port 2
+
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+    items:
+      enum: [1, 2, 3, 4]
+
+  qcom,rx-port-mapping:
+    description: |
+      Specifies static port mapping between device and host rx ports.
+      In the order of device port index which are hph_port, clsh_port,
+      comp_port, lo_port, dsd port.
+      Supports maximum 2 rx soundwire ports.
+
+      PM4125 RX Port 1 (HPH_L/R)       <==>    SWR1 Port 1 (HPH_L/R)
+      PM4125 RX Port 2 (COMP_L/R)      <==>    SWR1 Port 3 (COMP_L/R)
+
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+    items:
+      enum: [1, 2, 3, 4, 5]
+
+required:
+  - compatible
+  - reg
+
+oneOf:
+  - required:
+      - qcom,tx-port-mapping
+  - required:
+      - qcom,rx-port-mapping
+
+additionalProperties: false
+
+examples:
+  - |
+    soundwire@a610000 {
+        reg = <0x0a610000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        pm4125_rx: codec@0,1 {
+            compatible = "sdw20217010c00";
+            reg = <0 1>;
+            qcom,rx-port-mapping = <1 3>;
+        };
+    };
+...