openwrtv4/target/linux/brcm2708/patches-4.4/0241-Add-Support-for-BoomBerry-Audio-boards.patch

From 5d4a20fc508c8e161ba58eace5ddd3d91a27f1f9 Mon Sep 17 00:00:00 2001
From: Aaron Shaw <shawaj@gmail.com>
Date: Thu, 7 Apr 2016 21:26:21 +0100
Subject: [PATCH] Add Support for BoomBerry Audio boards

---
 arch/arm/boot/dts/overlays/Makefile                |   2 +
 arch/arm/boot/dts/overlays/README                  |  26 +++
 .../boot/dts/overlays/boomberry-dac-overlay.dts    |  43 +++++
 .../boot/dts/overlays/boomberry-digi-overlay.dts   |  39 ++++
 arch/arm/configs/bcm2709_defconfig                 |   2 +
 arch/arm/configs/bcmrpi_defconfig                  |   2 +
 sound/soc/bcm/Kconfig                              |  14 ++
 sound/soc/bcm/Makefile                             |   4 +
 sound/soc/bcm/boomberry-dac.c                      | 163 ++++++++++++++++
 sound/soc/bcm/boomberry-digi.c                     | 215 +++++++++++++++++++++
 10 files changed, 510 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/boomberry-dac-overlay.dts
 create mode 100644 arch/arm/boot/dts/overlays/boomberry-digi-overlay.dts
 create mode 100644 sound/soc/bcm/boomberry-dac.c
 create mode 100644 sound/soc/bcm/boomberry-digi.c

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -16,6 +16,8 @@ dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += boomberry-dac.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += boomberry-digi.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += dwc2.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += dwc-otg.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -225,6 +225,32 @@ Load:   dtoverlay=bmp085_i2c-sensor
 Params: <None>
 
 
+Name:   boomberry-dac
+Info:   Configures the BoomBerry DAC HAT, Amp HAT, DAC Zero and Amp Zero audio
+        cards
+Load:   dtoverlay=boomberry-dac,<param>=<val>
+Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
+                                Digital volume control. Enable with
+                                "dtoverlay=boomberry-dac,24db_digital_gain"
+                                (The default behaviour is that the Digital
+                                volume control is limited to a maximum of
+                                0dB. ie. it can attenuate but not provide
+                                gain. For most users, this will be desired
+                                as it will prevent clipping. By appending
+                                the 24dB_digital_gain parameter, the Digital
+                                volume control will allow up to 24dB of
+                                gain. If this parameter is enabled, it is the
+                                responsibility of the user to ensure that
+                                the Digital volume control is set to a value
+                                that does not result in clipping/distortion!)
+
+
+Name:   boomberry-digi
+Info:   Configures the BoomBerry Digi HAT and Digi Zero audio cards
+Load:   dtoverlay=boomberry-digi
+Params: <None>
+
+
 Name:   dht11
 Info:   Overlay for the DHT11/DHT21/DHT22 humidity/temperature sensors
         Also sometimes found with the part number(s) AM230x.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/boomberry-dac-overlay.dts
@@ -0,0 +1,43 @@
+// Definitions for BoomBerry DAC
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		frag0: __overlay__ {
+			compatible = "boomberry,boomberry-dac";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			pcm5122@4d {
+				#sound-dai-cells = <0>;
+				compatible = "ti,pcm5122";
+				reg = <0x4d>;
+				status = "okay";
+			};
+		};
+	};
+
+	__overrides__ {
+		24db_digital_gain = <&frag0>,"boomberry,24db_digital_gain?";
+	};
+};
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/boomberry-digi-overlay.dts
@@ -0,0 +1,39 @@
+// Definitions for BoomBerry Digi
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "boomberry,boomberry-digi";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			wm8804@3b {
+				#sound-dai-cells = <0>;
+				compatible = "wlf,wm8804";
+				reg = <0x3b>;
+				status = "okay";
+			};
+		};
+	};
+};
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -853,6 +853,8 @@ CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
+CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
+CONFIG_SNG_BCM2708_SOC_BOOMBERRY_DIGI=m
 CONFIG_SND_BCM2708_SOC_RPI_DAC=m
 CONFIG_SND_BCM2708_SOC_RPI_PROTO=m
 CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -845,6 +845,8 @@ CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
+CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
+CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
 CONFIG_SND_BCM2708_SOC_RPI_DAC=m
 CONFIG_SND_BCM2708_SOC_RPI_PROTO=m
 CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -50,6 +50,20 @@ config SND_BCM2708_SOC_RPI_PROTO
 	help
 	  Say Y or M if you want to add support for Audio Codec Board PROTO (WM8731).
 
+config SND_BCM2708_SOC_BOOMBERRY_DAC
+	tristate "Support for BoomBerry DAC"
+	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+	select SND_SOC_PCM512x
+	help
+	  Say Y or M if you want to add support for BoomBerry DAC.
+
+config SND_BCM2708_SOC_BOOMBERRY_DIGI
+	tristate "Support for BoomBerry Digi"
+	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+	select SND_SOC_WM8804
+	help
+	  Say Y or M if you want to add support for BoomBerry Digi.
+
 config SND_BCM2708_SOC_IQAUDIO_DAC
 	tristate "Support for IQaudIO-DAC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -8,6 +8,8 @@ snd-soc-hifiberry-dac-objs := hifiberry_
 snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 snd-soc-hifiberry-digi-objs := hifiberry_digi.o
 snd-soc-hifiberry-amp-objs := hifiberry_amp.o
+snd-soc-boomberry-dac-objs := boomberry-dac.o
+snd-soc-boomberry-digi-objs := boomberry-digi.o
 snd-soc-rpi-dac-objs := rpi-dac.o
 snd-soc-rpi-proto-objs := rpi-proto.o
 snd-soc-iqaudio-dac-objs := iqaudio-dac.o
@@ -17,6 +19,8 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
+obj-$(CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC) += snd-soc-boomberry-dac.o
+obj-$(CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI) += snd-soc-boomberry-digi.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
--- /dev/null
+++ b/sound/soc/bcm/boomberry-dac.c
@@ -0,0 +1,163 @@
+/*
+ * ASoC Driver for BoomBerry DAC Raspberry Pi HAT Sound Card
+ *
+ * Author:	Milan Neskovic
+ *		Copyright 2016
+ *		based on code by Daniel Matuschek <info@crazy-audio.com>
+ *		based on code by Florian Meier <florian.meier@koalo.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/pcm512x.h"
+
+static bool digital_gain_0db_limit = true;
+
+static int snd_rpi_boomberry_dac_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
+	snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
+	snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
+
+	if (digital_gain_0db_limit)
+	{
+		int ret;
+		struct snd_soc_card *card = rtd->card;
+		struct snd_soc_codec *codec = rtd->codec;
+
+		ret = snd_soc_limit_volume(codec, "Digital Playback Volume", 207);
+		if (ret < 0)
+			dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
+	}
+
+	return 0;
+}
+
+static int snd_rpi_boomberry_dac_hw_params(struct snd_pcm_substream *substream,
+				       struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	/*return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);*/
+	unsigned int sample_bits =
+		snd_pcm_format_physical_width(params_format(params));
+	return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
+}
+
+static int snd_rpi_boomberry_dac_startup(struct snd_pcm_substream *substream) {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
+	return 0;
+}
+
+static void snd_rpi_boomberry_dac_shutdown(struct snd_pcm_substream *substream) {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_boomberry_dac_ops = {
+	.hw_params = snd_rpi_boomberry_dac_hw_params,
+	.startup = snd_rpi_boomberry_dac_startup,
+	.shutdown = snd_rpi_boomberry_dac_shutdown,
+};
+
+static struct snd_soc_dai_link snd_rpi_boomberry_dac_dai[] = {
+{
+	.name		= "BoomBerry DAC",
+	.stream_name	= "BoomBerry DAC HiFi",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	.codec_dai_name	= "pcm512x-hifi",
+	.platform_name	= "bcm2708-i2s.0",
+	.codec_name	= "pcm512x.1-004d",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBS_CFS,
+	.ops		= &snd_rpi_boomberry_dac_ops,
+	.init		= snd_rpi_boomberry_dac_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_boomberry_dac = {
+	.name         = "snd_rpi_boomberry_dac",
+	.owner        = THIS_MODULE,
+	.dai_link     = snd_rpi_boomberry_dac_dai,
+	.num_links    = ARRAY_SIZE(snd_rpi_boomberry_dac_dai),
+};
+
+static int snd_rpi_boomberry_dac_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_boomberry_dac.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_boomberry_dac_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+			dai->cpu_dai_name = NULL;
+			dai->cpu_of_node = i2s_node;
+			dai->platform_name = NULL;
+			dai->platform_of_node = i2s_node;
+	    }
+
+	    digital_gain_0db_limit = !of_property_read_bool(
+			pdev->dev.of_node, "boomberry,24db_digital_gain");
+	}
+
+	ret = snd_soc_register_card(&snd_rpi_boomberry_dac);
+	if (ret)
+		dev_err(&pdev->dev,
+			"snd_soc_register_card() failed: %d\n", ret);
+
+	return ret;
+}
+
+static int snd_rpi_boomberry_dac_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_boomberry_dac);
+}
+
+static const struct of_device_id snd_rpi_boomberry_dac_of_match[] = {
+	{ .compatible = "boomberry,boomberry-dac", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_boomberry_dac_of_match);
+
+static struct platform_driver snd_rpi_boomberry_dac_driver = {
+	.driver = {
+		.name   = "snd-rpi-boomberry-dac",
+		.owner  = THIS_MODULE,
+		.of_match_table = snd_rpi_boomberry_dac_of_match,
+	},
+	.probe          = snd_rpi_boomberry_dac_probe,
+	.remove         = snd_rpi_boomberry_dac_remove,
+};
+
+module_platform_driver(snd_rpi_boomberry_dac_driver);
+
+MODULE_AUTHOR("Milan Neskovic <info@boomberry.co>");
+MODULE_DESCRIPTION("ASoC Driver for BoomBerry PI DAC HAT Sound Card");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/sound/soc/bcm/boomberry-digi.c
@@ -0,0 +1,215 @@
+/*
+ * ASoC Driver for BoomBerry Raspberry Pi Digi HAT Sound Card
+ *
+ * Author:	Milan Neskovic
+ *		Copyright 2016
+ *		based on code by Daniel Matuschek <info@crazy-audio.com>
+ *		based on code by Florian Meier <florian.meier@koalo.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/wm8804.h"
+
+static int snd_rpi_boomberry_digi_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+
+	/* enable TX output */
+	snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
+
+	return 0;
+}
+
+static int snd_rpi_boomberry_digi_startup(struct snd_pcm_substream *substream) {
+	/* turn on digital output */
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
+	return 0;
+}
+
+static void snd_rpi_boomberry_digi_shutdown(struct snd_pcm_substream *substream) {
+	/* turn off output */
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
+}
+
+static int snd_rpi_boomberry_digi_hw_params(struct snd_pcm_substream *substream,
+				       struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	int sysclk = 27000000; /* This is fixed on this board */
+
+	long mclk_freq=0;
+	int mclk_div=1;
+	int sampling_freq=1;
+
+	int ret;
+
+	int samplerate = params_rate(params);
+
+	if (samplerate<=96000) {
+		mclk_freq=samplerate*256;
+		mclk_div=WM8804_MCLKDIV_256FS;
+	} else {
+		mclk_freq=samplerate*128;
+		mclk_div=WM8804_MCLKDIV_128FS;
+	}
+
+	switch (samplerate) {
+		case 32000:
+			sampling_freq=0x03;
+			break;
+		case 44100:
+			sampling_freq=0x00;
+			break;
+		case 48000:
+			sampling_freq=0x02;
+			break;
+		case 88200:
+			sampling_freq=0x08;
+			break;
+		case 96000:
+			sampling_freq=0x0a;
+			break;
+		case 176400:
+			sampling_freq=0x0c;
+			break;
+		case 192000:
+			sampling_freq=0x0e;
+			break;
+		default:
+			dev_err(codec->dev,
+			"Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
+			samplerate);
+	}
+
+	snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
+	snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
+					sysclk, SND_SOC_CLOCK_OUT);
+	if (ret < 0) {
+		dev_err(codec->dev,
+		"Failed to set WM8804 SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	/* Enable TX output */
+	snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
+
+	/* Power on */
+	snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
+
+	/* set sampling frequency status bits */
+	snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
+
+	return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_boomberry_digi_ops = {
+	.hw_params = snd_rpi_boomberry_digi_hw_params,
+        .startup = snd_rpi_boomberry_digi_startup,
+        .shutdown = snd_rpi_boomberry_digi_shutdown,
+};
+
+static struct snd_soc_dai_link snd_rpi_boomberry_digi_dai[] = {
+{
+	.name		= "BoomBerry Digi",
+	.stream_name	= "BoomBerry Digi HiFi",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	.codec_dai_name	= "wm8804-spdif",
+	.platform_name	= "bcm2708-i2s.0",
+	.codec_name	= "wm8804.1-003b",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBM_CFM,
+	.ops		= &snd_rpi_boomberry_digi_ops,
+	.init		= snd_rpi_boomberry_digi_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_boomberry_digi = {
+	.name         = "snd_rpi_boomberry_digi",
+	.owner        = THIS_MODULE,
+	.dai_link     = snd_rpi_boomberry_digi_dai,
+	.num_links    = ARRAY_SIZE(snd_rpi_boomberry_digi_dai),
+};
+
+static int snd_rpi_boomberry_digi_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_boomberry_digi.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_boomberry_digi_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+			dai->cpu_dai_name = NULL;
+			dai->cpu_of_node = i2s_node;
+			dai->platform_name = NULL;
+			dai->platform_of_node = i2s_node;
+	    }
+	}
+
+	ret = snd_soc_register_card(&snd_rpi_boomberry_digi);
+	if (ret)
+		dev_err(&pdev->dev,
+			"snd_soc_register_card() failed: %d\n", ret);
+
+	return ret;
+}
+
+static int snd_rpi_boomberry_digi_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_boomberry_digi);
+}
+
+static const struct of_device_id snd_rpi_boomberry_digi_of_match[] = {
+	{ .compatible = "boomberry,boomberry-digi", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_boomberry_digi_of_match);
+
+static struct platform_driver snd_rpi_boomberry_digi_driver = {
+	.driver = {
+		.name   = "snd-rpi-boomberry-digi",
+		.owner  = THIS_MODULE,
+		.of_match_table = snd_rpi_boomberry_digi_of_match,
+	},
+	.probe          = snd_rpi_boomberry_digi_probe,
+	.remove         = snd_rpi_boomberry_digi_remove,
+};
+
+module_platform_driver(snd_rpi_boomberry_digi_driver);
+
+MODULE_AUTHOR("Milan Neskovic <info@boomberry.co>");
+MODULE_DESCRIPTION("ASoC Driver for BoomBerry PI Digi HAT Sound Card");
+MODULE_LICENSE("GPL v2");