ASoC: codecs: wcd937x: add wcd937x audio codec

Merge series from Mohammad Rafi Shaik <quic_mohs@quicinc.com>:

This patchset adds support for Qualcomm WCD9370/WCD9375 codec.

Qualcomm WCD9370/WCD9375 Codec is a standalone Hi-Fi audio codec IC
connected over SoundWire. This device has two SoundWire devices, RX and
TX respectively supporting 3 x ADCs, ClassH, Ear, Aux PA, 2xHPH,
6 DMICs and MBHC.

For codec driver to be functional it would need both tx and rx Soundwire devices
to be up and this is taken care by using device component framework and device-links
are used to ensure proper pm dependencies. Ex tx does not enter suspend
before rx or codec is suspended.

This patchset along with other SoundWire patches on the list
have been tested on QCM6490 IDP device.

Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,wcd937x-sdw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SoundWire Slave devices on WCD9370/WCD9375
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  Qualcomm WCD9370/WCD9375 Codec is a standalone Hi-Fi audio codec IC.
+  It has RX and TX Soundwire slave devices. This bindings is for the
+  slave devices.
+
+properties:
+  compatible:
+    const: sdw20217010a00
+
+  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 4 tx soundwire ports.
+
+      WCD9370 TX Port 1 (ADC1)               <=> SWR2 Port 2
+      WCD9370 TX Port 2 (ADC2, 3)            <=> SWR2 Port 2
+      WCD9370 TX Port 3 (DMIC0,1,2,3 & MBHC) <=> SWR2 Port 3
+      WCD9370 TX Port 4 (DMIC4,5,6,7)        <=> SWR2 Port 4
+
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 4
+    maxItems: 4
+    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 5 rx soundwire ports.
+
+      WCD9370 RX Port 1 (HPH_L/R)       <==>    SWR1 Port 1 (HPH_L/R)
+      WCD9370 RX Port 2 (CLSH)          <==>    SWR1 Port 2 (CLSH)
+      WCD9370 RX Port 3 (COMP_L/R)      <==>    SWR1 Port 3 (COMP_L/R)
+      WCD9370 RX Port 4 (LO)            <==>    SWR1 Port 4 (LO)
+      WCD9370 RX Port 5 (DSD_L/R)       <==>    SWR1 Port 5 (DSD)
+
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 5
+    maxItems: 5
+    items:
+      enum: [1, 2, 3, 4, 5]
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    soundwire@3210000 {
+        reg = <0x03210000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        wcd937x_rx: codec@0,4 {
+            compatible = "sdw20217010a00";
+            reg = <0 4>;
+            qcom,rx-port-mapping = <1 2 3 4 5>;
+        };
+    };
+
+    soundwire@3230000 {
+        reg = <0x03230000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        wcd937x_tx: codec@0,3 {
+            compatible = "sdw20217010a00";
+            reg = <0 3>;
+            qcom,tx-port-mapping = <2 2 3 4>;
+        };
+    };
+
+...

Documentation/devicetree/bindings/sound/qcom,wcd937x.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,wcd937x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm WCD9370/WCD9375 Audio Codec
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description:
+  Qualcomm WCD9370/WCD9375 Codec is a standalone Hi-Fi audio codec IC.
+  It has RX and TX Soundwire slave devices.
+
+allOf:
+  - $ref: dai-common.yaml#
+  - $ref: qcom,wcd93xx-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: qcom,wcd9370-codec
+      - items:
+          - const: qcom,wcd9375-codec
+          - const: qcom,wcd9370-codec
+
+  vdd-px-supply:
+    description: A reference to the 1.8V I/O supply
+
+required:
+  - compatible
+  - vdd-px-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    codec {
+        compatible = "qcom,wcd9370-codec";
+        pinctrl-names = "default", "sleep";
+        pinctrl-0 = <&wcd_reset_n>;
+        pinctrl-1 = <&wcd_reset_n_sleep>;
+        reset-gpios = <&tlmm 83 GPIO_ACTIVE_HIGH>;
+        vdd-buck-supply = <&vreg_l17b_1p8>;
+        vdd-rxtx-supply = <&vreg_l18b_1p8>;
+        vdd-px-supply = <&vreg_l18b_1p8>;
+        vdd-mic-bias-supply = <&vreg_bob>;
+        qcom,micbias1-microvolt = <1800000>;
+        qcom,micbias2-microvolt = <1800000>;
+        qcom,micbias3-microvolt = <1800000>;
+        qcom,micbias4-microvolt = <1800000>;
+        qcom,rx-device = <&wcd937x_rx>;
+        qcom,tx-device = <&wcd937x_tx>;
+        #sound-dai-cells = <1>;
+    };
+
+    /* ... */
+
+    soundwire@3210000 {
+        reg = <0x03210000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        wcd937x_rx: codec@0,4 {
+            compatible = "sdw20217010a00";
+            reg = <0 4>;
+            qcom,rx-port-mapping = <1 2 3 4 5>;
+        };
+    };
+
+    soundwire@3230000 {
+        reg = <0x03230000 0x2000>;
+        #address-cells = <2>;
+        #size-cells = <0>;
+        wcd937x_tx: codec@0,3 {
+            compatible = "sdw20217010a00";
+            reg = <0 3>;
+            qcom,tx-port-mapping = <1 2 3 4>;
+        };
+    };
+...

sound/soc/codecs/Kconfig

@@ -279,6 +279,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_UDA1380
 	imply SND_SOC_WCD9335
 	imply SND_SOC_WCD934X
+	imply SND_SOC_WCD937X_SDW
 	imply SND_SOC_WCD938X_SDW
 	imply SND_SOC_WCD939X_SDW
 	imply SND_SOC_LPASS_MACRO_COMMON
@@ -2111,6 +2112,25 @@ config SND_SOC_WCD934X
 	  The WCD9340/9341 is a audio codec IC Integrated in
 	  Qualcomm SoCs like SDM845.
 
+config SND_SOC_WCD937X
+	depends on SND_SOC_WCD937X_SDW
+	tristate
+	depends on SOUNDWIRE || !SOUNDWIRE
+	select SND_SOC_WCD_CLASSH
+
+config SND_SOC_WCD937X_SDW
+	tristate "WCD9370/WCD9375 Codec - SDW"
+	select SND_SOC_WCD937X
+	select SND_SOC_WCD_MBHC
+	select REGMAP_IRQ
+	depends on SOUNDWIRE
+	select REGMAP_SOUNDWIRE
+	help
+	  The WCD9370/9375 is an audio codec IC used with SoCs
+	  like SC7280 or QCM6490 chipsets, and it connected
+	  via soundwire.
+	  To compile this codec driver say Y or m.
+
 config SND_SOC_WCD938X
 	depends on SND_SOC_WCD938X_SDW
 	tristate

sound/soc/codecs/Makefile

@@ -318,6 +318,8 @@ snd-soc-wcd-classh-y := wcd-clsh-v2.o
 snd-soc-wcd-mbhc-y := wcd-mbhc-v2.o
 snd-soc-wcd9335-y := wcd9335.o
 snd-soc-wcd934x-y := wcd934x.o
+snd-soc-wcd937x-objs := wcd937x.o
+snd-soc-wcd937x-sdw-objs := wcd937x-sdw.o
 snd-soc-wcd938x-y := wcd938x.o
 snd-soc-wcd938x-sdw-y := wcd938x-sdw.o
 snd-soc-wcd939x-y := wcd939x.o
@@ -714,6 +716,11 @@ obj-$(CONFIG_SND_SOC_WCD_CLASSH)	+= snd-soc-wcd-classh.o
 obj-$(CONFIG_SND_SOC_WCD_MBHC)	+= snd-soc-wcd-mbhc.o
 obj-$(CONFIG_SND_SOC_WCD9335)	+= snd-soc-wcd9335.o
 obj-$(CONFIG_SND_SOC_WCD934X)	+= snd-soc-wcd934x.o
+obj-$(CONFIG_SND_SOC_WCD937X)	+= snd-soc-wcd937x.o
+ifdef CONFIG_SND_SOC_WCD937X_SDW
+# avoid link failure by forcing sdw code built-in when needed
+obj-$(CONFIG_SND_SOC_WCD937X) += snd-soc-wcd937x-sdw.o
+endif
 obj-$(CONFIG_SND_SOC_WCD938X)	+= snd-soc-wcd938x.o
 ifdef CONFIG_SND_SOC_WCD938X_SDW
 # avoid link failure by forcing sdw code built-in when needed