Add Chameleon v3 ASoC audio

Merge series from Paweł Anikiel <pan@semihalf.com>:

The Google Chameleon v3 is a device made for testing audio and video
paths of other devices. This patchset adds support for ASoC audio on
this device. It has two audio sources: HDMI audio from the it68051 chip
(RX only), and analog audio from the ssm2603 chip (RX and TX).

The patchset adds the ASoC platform and codec drivers.

Documentation/devicetree/bindings/sound/google,chv3-codec.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/google,chv3-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Chameleon v3 audio codec
+
+maintainers:
+  - Paweł Anikiel <pan@semihalf.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: google,chv3-codec
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    audio-codec {
+        compatible = "google,chv3-codec";
+    };

Documentation/devicetree/bindings/sound/google,chv3-i2s.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/google,chv3-i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Chameleon v3 I2S device
+
+maintainers:
+  - Paweł Anikiel <pan@semihalf.com>
+
+description: |
+  I2S device for the Google Chameleon v3. The device handles both RX
+  and TX using a producer/consumer ring buffer design.
+
+properties:
+  compatible:
+    const: google,chv3-i2s
+
+  reg:
+    items:
+      - description: core registers
+      - description: irq registers
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2s@c0060300 {
+        compatible = "google,chv3-i2s";
+        reg = <0xc0060300 0x100>,
+              <0xc0060f00 0x10>;
+        interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
+    };

sound/soc/Kconfig

@@ -75,6 +75,7 @@ source "sound/soc/bcm/Kconfig"
 source "sound/soc/cirrus/Kconfig"
 source "sound/soc/dwc/Kconfig"
 source "sound/soc/fsl/Kconfig"
+source "sound/soc/google/Kconfig"
 source "sound/soc/hisilicon/Kconfig"
 source "sound/soc/jz4740/Kconfig"
 source "sound/soc/kirkwood/Kconfig"

sound/soc/Makefile

@@ -43,6 +43,7 @@ obj-$(CONFIG_SND_SOC)	+= bcm/
 obj-$(CONFIG_SND_SOC)	+= cirrus/
 obj-$(CONFIG_SND_SOC)	+= dwc/
 obj-$(CONFIG_SND_SOC)	+= fsl/
+obj-$(CONFIG_SND_SOC)	+= google/
 obj-$(CONFIG_SND_SOC)	+= hisilicon/
 obj-$(CONFIG_SND_SOC)	+= jz4740/
 obj-$(CONFIG_SND_SOC)	+= img/

sound/soc/codecs/Kconfig

@@ -57,6 +57,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_AW88395
 	imply SND_SOC_BT_SCO
 	imply SND_SOC_BD28623
+	imply SND_SOC_CHV3_CODEC
 	imply SND_SOC_CQ0093VC
 	imply SND_SOC_CROS_EC_CODEC
 	imply SND_SOC_CS35L32
@@ -644,6 +645,13 @@ config SND_SOC_BD28623
 config SND_SOC_BT_SCO
 	tristate "Dummy BT SCO codec driver"
 
+config SND_SOC_CHV3_CODEC
+	tristate "Google Chameleon v3 codec driver"
+	help
+	  Enable support for the Google Chameleon v3 audio codec.
+	  This codec does not have a control interface, it always outputs
+	  8 channel S32_LE audio.
+
 config SND_SOC_CPCAP
 	tristate "Motorola CPCAP codec"
 	depends on MFD_CPCAP || COMPILE_TEST

sound/soc/codecs/Makefile

@@ -51,6 +51,7 @@ snd-soc-aw88395-objs := aw88395/aw88395.o \
 			aw88395/aw88395_device.o
 snd-soc-bd28623-objs := bd28623.o
 snd-soc-bt-sco-objs := bt-sco.o
+snd-soc-chv3-codec-objs := chv3-codec.o
 snd-soc-cpcap-objs := cpcap.o
 snd-soc-cq93vc-objs := cq93vc.o
 snd-soc-cros-ec-codec-objs := cros_ec_codec.o
@@ -427,6 +428,7 @@ obj-$(CONFIG_SND_SOC_AW88395_LIB) += snd-soc-aw88395-lib.o
 obj-$(CONFIG_SND_SOC_AW88395)	+=snd-soc-aw88395.o
 obj-$(CONFIG_SND_SOC_BD28623)	+= snd-soc-bd28623.o
 obj-$(CONFIG_SND_SOC_BT_SCO)	+= snd-soc-bt-sco.o
+obj-$(CONFIG_SND_SOC_CHV3_CODEC) += snd-soc-chv3-codec.o
 obj-$(CONFIG_SND_SOC_CQ0093VC) += snd-soc-cq93vc.o
 obj-$(CONFIG_SND_SOC_CPCAP)	+= snd-soc-cpcap.o
 obj-$(CONFIG_SND_SOC_CROS_EC_CODEC)	+= snd-soc-cros-ec-codec.o

sound/soc/codecs/chv3-codec.c

+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/module.h>
+#include <sound/soc.h>
+
+static struct snd_soc_dai_driver chv3_codec_dai = {
+	.name = "chv3-codec-hifi",
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 8,
+		.channels_max = 8,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE,
+	},
+};
+
+static const struct snd_soc_component_driver soc_component_dev_chv3_codec = {
+};
+
+static int chv3_codec_probe(struct platform_device *pdev)
+{
+	return devm_snd_soc_register_component(&pdev->dev,
+		&soc_component_dev_chv3_codec, &chv3_codec_dai, 1);
+}
+
+static const struct of_device_id chv3_codec_of_match[] = {
+	{ .compatible = "google,chv3-codec", },
+	{ }
+};
+
+static struct platform_driver chv3_codec_platform_driver = {
+	.driver = {
+		.name = "chv3-codec",
+		.of_match_table = chv3_codec_of_match,
+	},
+	.probe = chv3_codec_probe,
+};
+module_platform_driver(chv3_codec_platform_driver);
+
+MODULE_DESCRIPTION("ASoC Chameleon v3 codec driver");
+MODULE_AUTHOR("Pawel Anikiel <pan@semihalf.com>");
+MODULE_LICENSE("GPL");

sound/soc/google/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+
+config SND_SOC_CHV3_I2S
+	tristate "Google Chameleon v3 I2S device"
+	help
+	  Enable support for the Google Chameleon v3 I2S device.

sound/soc/google/Makefile

+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_SND_SOC_CHV3_I2S) += chv3-i2s.o