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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");
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