Add support for merus-amp soundcard and ma120x0p codec

arch/arm/boot/dts/overlays/Makefile

@@ -103,6 +103,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	mcp3202.dtbo \
 	mcp342x.dtbo \
 	media-center.dtbo \
+	merus-amp.dtbo \
 	midi-uart0.dtbo \
 	midi-uart1.dtbo \
 	miniuart-bt.dtbo \

arch/arm/boot/dts/overlays/README

@@ -1658,6 +1658,12 @@ Params: speed                   Display SPI bus speed
                                 (default "off")
 
 
+Name:   merus-amp
+Info:   Configures the merus-amp audio card
+Load:   dtoverlay=merus-amp
+Params: <None>
+
+
 Name:   midi-uart0
 Info:   Configures UART0 (ttyAMA0) so that a requested 38.4kbaud actually gets
         31.25kbaud, the frequency required for MIDI

arch/arm/boot/dts/overlays/merus-amp-overlay.dts

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for Infineon Merus-Amp
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/pinctrl/bcm2835.h>
+#include <dt-bindings/gpio/gpio.h>
+
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&gpio>;
+		__overlay__ {
+			merus_amp_pins: merus_amp_pins {
+				brcm,pins = <23>;
+				brcm,function = <0>; /* in */
+				brcm,pull = <2>; /* up */
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			merus_amp: ma120x0p@20 {
+				#sound-dai-cells = <0>;
+				compatible = "ma,ma120x0p";
+				reg = <0x20>;
+				status = "okay";
+				pinctrl-names = "default";
+				pinctrl-0 = <&merus_amp_pins>;
+				enable_gp-gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+				mute_gp-gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+				booster_gp-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+				error_gp-gpios = <&gpio 23 GPIO_ACTIVE_HIGH>;
+			};
+		};
+	};
+
+	fragment@3 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "merus,merus-amp";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+};

sound/soc/bcm/rpi-simple-soundcard.c

@@ -16,6 +16,10 @@
  * adau1977-adc.c
  * by Andrey Grodzovsky <[email protected]>
  *
+ * merus-amp.c
+ * by Ariel Muszkat <[email protected]>
+ *		Jorgen Kragh Jakobsen <[email protected]>
+ *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 as published by the Free Software Foundation.
@@ -205,6 +209,24 @@ static struct snd_rpi_simple_drvdata drvdata_rpi_dac = {
 	.fixed_bclk_ratio = 64,
 };
 
+static struct snd_soc_dai_link snd_merus_amp_dai[] = {
+	{
+		.name           = "MerusAmp",
+		.stream_name    = "Merus Audio Amp",
+		.codec_dai_name = "ma120x0p-amp",
+		.codec_name     = "ma120x0p.1-0020",
+		.dai_fmt        = SND_SOC_DAIFMT_I2S |
+					SND_SOC_DAIFMT_NB_NF |
+					SND_SOC_DAIFMT_CBS_CFS,
+	},
+};
+
+static struct snd_rpi_simple_drvdata drvdata_merus_amp = {
+	.card_name        = "snd_rpi_merus_amp",
+	.dai              = snd_merus_amp_dai,
+	.fixed_bclk_ratio = 64,
+};
+
 static const struct of_device_id snd_rpi_simple_of_match[] = {
 	{ .compatible = "adi,adau1977-adc",
 		.data = (void *) &drvdata_adau1977 },
@@ -217,6 +239,8 @@ static const struct of_device_id snd_rpi_simple_of_match[] = {
 	{ .compatible = "hifiberry,hifiberry-dac",
 		.data = (void *) &drvdata_hifiberry_dac },
 	{ .compatible = "rpi,rpi-dac", &drvdata_rpi_dac},
+	{ .compatible = "merus,merus-amp",
+		.data = (void *) &drvdata_merus_amp },
 	{},
 };
 

sound/soc/codecs/Kconfig

@@ -89,6 +89,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_JZ4740_CODEC
 	select SND_SOC_LM4857 if I2C
 	select SND_SOC_LM49453 if I2C
+	select SND_SOC_MA120X0P if I2C
 	select SND_SOC_MAX98088 if I2C
 	select SND_SOC_MAX98090 if I2C
 	select SND_SOC_MAX98095 if I2C
@@ -631,6 +632,13 @@ config SND_SOC_ISABELLE
 config SND_SOC_LM49453
 	tristate
 
+config SND_SOC_MA120X0P
+	tristate "Infineon Merus(TM) MA120X0P Multilevel Class-D Audio amplifiers"
+	depends on I2C
+	help
+		Enable support for Infineon MA120X0P Multilevel Class-D audio power
+		amplifiers.
+
 config SND_SOC_MAX98088
        tristate
 

sound/soc/codecs/Makefile

@@ -86,6 +86,7 @@ snd-soc-jz4740-codec-objs := jz4740.o
 snd-soc-l3-objs := l3.o
 snd-soc-lm4857-objs := lm4857.o
 snd-soc-lm49453-objs := lm49453.o
+snd-soc-ma120x0p-objs := ma120x0p.o
 snd-soc-max9759-objs := max9759.o
 snd-soc-max9768-objs := max9768.o
 snd-soc-max98088-objs := max98088.o
@@ -349,6 +350,7 @@ obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o
 obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o
 obj-$(CONFIG_SND_SOC_LM4857)	+= snd-soc-lm4857.o
 obj-$(CONFIG_SND_SOC_LM49453)   += snd-soc-lm49453.o
+obj-$(CONFIG_SND_SOC_MA120X0P)   += snd-soc-ma120x0p.o
 obj-$(CONFIG_SND_SOC_MAX9759)	+= snd-soc-max9759.o
 obj-$(CONFIG_SND_SOC_MAX9768)	+= snd-soc-max9768.o
 obj-$(CONFIG_SND_SOC_MAX98088)	+= snd-soc-max98088.o