ASoC: codecs: add support for WCD939x Codec

Merge series from Neil Armstrong <neil.armstrong@linaro.org>:

Add the main WCD9390/WCD9395 Audio Codec driver to support:
- 4 ADC inputs for up to 5 Analog Microphones
- 4 DMIC inputs for up to 8 Digital Microphones
- 4 Microphone BIAS
- Stereo Headphone output
- Mono EAR output
- MBHC engine for Headset Detection

This adds:
- bindings
- MBHC changes to support Type-C muc
- Soundwire Slave driver
- Code driver

The USB Mux subsystem support will be submitted separately
since it's a functionally separate subsystem connected over
I2C with it's own reset signal.

4 files changed, 261 insertions, 80 deletions

diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
index adbfa67f88ed..cf6c3787adfe 100644
--- a/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
@@ -15,6 +15,7 @@ description: |
 
 allOf:
   - $ref: dai-common.yaml#
+  - $ref: qcom,wcd93xx-common.yaml#
 
 properties:
   compatible:
@@ -22,92 +23,12 @@ properties:
       - qcom,wcd9380-codec
       - qcom,wcd9385-codec
 
-  reset-gpios:
-    description: GPIO spec for reset line to use
-    maxItems: 1
-
   us-euro-gpios:
     description: GPIO spec for swapping gnd and mic segments
     maxItems: 1
 
-  vdd-buck-supply:
-    description: A reference to the 1.8V buck supply
-
-  vdd-rxtx-supply:
-    description: A reference to the 1.8V rx supply
-
-  vdd-io-supply:
-    description: A reference to the 1.8V I/O supply
-
-  vdd-mic-bias-supply:
-    description: A reference to the 3.8V mic bias 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,micbias4-microvolt:
-    description: micbias4 voltage
-    minimum: 1800000
-    maximum: 2850000
-
-  qcom,hphl-jack-type-normally-closed:
-    description: Indicates that HPHL jack switch type is normally closed
-    type: boolean
-
-  qcom,ground-jack-type-normally-closed:
-    description: Indicates that Headset Ground switch type is normally closed
-    type: boolean
-
-  qcom,mbhc-headset-vthreshold-microvolt:
-    description: Voltage threshold value for headset detection
-    minimum: 0
-    maximum: 2850000
-
-  qcom,mbhc-headphone-vthreshold-microvolt:
-    description: Voltage threshold value for headphone detection
-    minimum: 0
-    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
-  - reset-gpios
-  - qcom,tx-device
-  - qcom,rx-device
-  - qcom,micbias1-microvolt
-  - qcom,micbias2-microvolt
-  - qcom,micbias3-microvolt
-  - qcom,micbias4-microvolt
-  - "#sound-dai-cells"
 
 unevaluatedProperties: false
 
diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd939x-sdw.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd939x-sdw.yaml
new file mode 100644
index 000000000000..67ed7701b5d6
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,wcd939x-sdw.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,wcd939x-sdw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SoundWire devices on WCD9390/WCD9395
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  Qualcomm WCD9390/WCD9395 Codec is a standalone Hi-Fi audio codec IC.
+  It has RX and TX Soundwire devices. This bindings is for the devices.
+
+properties:
+  compatible:
+    const: sdw20217010e00
+
+  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.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 4
+    maxItems: 4
+
+  qcom,rx-port-mapping:
+    description: |
+      Specifies static port mapping between device and host rx ports.
+      In the order of device port index.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 6
+    maxItems: 6
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    soundwire@3210000 {
+        #address-cells = <2>;
+        #size-cells = <0>;
+        reg = <0x03210000 0x2000>;
+        wcd938x_rx: codec@0,4 {
+            compatible = "sdw20217010e00";
+            reg = <0 4>;
+            qcom,rx-port-mapping = <1 2 3 4 5 6>;
+        };
+    };
+
+    soundwire@3230000 {
+        #address-cells = <2>;
+        #size-cells = <0>;
+        reg = <0x03230000 0x2000>;
+        wcd938x_tx: codec@0,3 {
+            compatible = "sdw20217010e00";
+            reg = <0 3>;
+            qcom,tx-port-mapping = <2 3 4 5>;
+        };
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml
new file mode 100644
index 000000000000..6e76f6a8634f
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,wcd939x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm WCD9380/WCD9385 Audio Codec
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  Qualcomm WCD9390/WCD9395 Codec is a standalone Hi-Fi audio codec IC.
+  It has RX and TX Soundwire devices.
+  The WCD9390/WCD9395 IC has a functionally separate USB-C Mux subsystem
+  accessible over an I2C interface.
+  The Audio Headphone and Microphone data path between the Codec and the USB-C Mux
+  subsystems are external to the IC, thus requiring DT port-endpoint graph description
+  to handle USB-C altmode & orientation switching for Audio Accessory Mode.
+
+allOf:
+  - $ref: dai-common.yaml#
+  - $ref: qcom,wcd93xx-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: qcom,wcd9390-codec
+      - items:
+          - const: qcom,wcd9395-codec
+          - const: qcom,wcd9390-codec
+
+  mode-switch:
+    description: Flag the port as possible handler of altmode switching
+    type: boolean
+
+  orientation-switch:
+    description: Flag the port as possible handler of orientation switching
+    type: boolean
+
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description:
+      A port node to link the WCD939x Codec node to USB MUX subsystems for the
+      purpose of handling altmode muxing and orientation switching to detect and
+      enable Audio Accessory Mode.
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    codec {
+        compatible = "qcom,wcd9390-codec";
+        reset-gpios = <&tlmm 32 IRQ_TYPE_NONE>;
+        #sound-dai-cells = <1>;
+        qcom,tx-device = <&wcd939x_tx>;
+        qcom,rx-device = <&wcd939x_rx>;
+        qcom,micbias1-microvolt = <1800000>;
+        qcom,micbias2-microvolt = <1800000>;
+        qcom,micbias3-microvolt = <1800000>;
+        qcom,micbias4-microvolt = <1800000>;
+        qcom,hphl-jack-type-normally-closed;
+        qcom,ground-jack-type-normally-closed;
+        qcom,mbhc-buttons-vthreshold-microvolt = <75000 150000 237000 500000 500000 500000 500000 500000>;
+        qcom,mbhc-headphone-vthreshold-microvolt = <50000>;
+    };
+
+    /* ... */
+
+    soundwire@3210000 {
+        #address-cells = <2>;
+        #size-cells = <0>;
+        reg = <0x03210000 0x2000>;
+        wcd939x_rx: codec@0,4 {
+            compatible = "sdw20217010e00";
+            reg = <0 4>;
+            qcom,rx-port-mapping = <1 2 3 4 5 6>;
+        };
+    };
+
+    soundwire@3230000 {
+        #address-cells = <2>;
+        #size-cells = <0>;
+        reg = <0x03230000 0x2000>;
+        wcd938x_tx: codec@0,3 {
+            compatible = "sdw20217010e00";
+            reg = <0 3>;
+            qcom,tx-port-mapping = <2 3 4 5>;
+        };
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd93xx-common.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd93xx-common.yaml
new file mode 100644
index 000000000000..f78ba148ad25
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,wcd93xx-common.yaml
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,wcd93xx-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common properties for Qualcomm WCD93xx Audio Codec
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+properties:
+  reset-gpios:
+    description: GPIO spec for reset line to use
+    maxItems: 1
+
+  vdd-buck-supply:
+    description: A reference to the 1.8V buck supply
+
+  vdd-rxtx-supply:
+    description: A reference to the 1.8V rx supply
+
+  vdd-io-supply:
+    description: A reference to the 1.8V I/O supply
+
+  vdd-mic-bias-supply:
+    description: A reference to the 3.8V mic bias 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,micbias4-microvolt:
+    description: micbias4 voltage
+    minimum: 1800000
+    maximum: 2850000
+
+  qcom,hphl-jack-type-normally-closed:
+    description: Indicates that HPHL jack switch type is normally closed
+    type: boolean
+
+  qcom,ground-jack-type-normally-closed:
+    description: Indicates that Headset Ground switch type is normally closed
+    type: boolean
+
+  qcom,mbhc-headset-vthreshold-microvolt:
+    description: Voltage threshold value for headset detection
+    minimum: 0
+    maximum: 2850000
+
+  qcom,mbhc-headphone-vthreshold-microvolt:
+    description: Voltage threshold value for headphone detection
+    minimum: 0
+    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:
+  - reset-gpios
+  - qcom,tx-device
+  - qcom,rx-device
+  - qcom,micbias1-microvolt
+  - qcom,micbias2-microvolt
+  - qcom,micbias3-microvolt
+  - qcom,micbias4-microvolt
+  - "#sound-dai-cells"
+
+additionalProperties: true