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openwrt/target/linux/bcm27xx/patches-4.19/950-0264-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch
Adrian Schmutzler 7d7aa2fd92 brcm2708: rename target to bcm27xx 
This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-14 14:10:51 +01:00

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From dde0ec6b9fd5755de3a8962489cde9c0ce5e5005 Mon Sep 17 00:00:00 2001
From: HiFiBerry <info@hifiberry.com>
Date: Mon, 8 Oct 2018 18:10:12 +0200
Subject: [PATCH] Added driver for the HiFiBerry DAC+ ADC (#2694)
Signed-off-by: Daniel Matuschek <daniel@hifiberry.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 21 +
.../overlays/hifiberry-dacplusadc-overlay.dts | 71 +++
sound/soc/bcm/Kconfig | 8 +
sound/soc/bcm/Makefile | 2 +
sound/soc/bcm/hifiberry_dacplusadc.c | 407 ++++++++++++++++++
8 files changed, 512 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
create mode 100644 sound/soc/bcm/hifiberry_dacplusadc.c
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -49,6 +49,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
hifiberry-amp.dtbo \
hifiberry-dac.dtbo \
hifiberry-dacplus.dtbo \
+ hifiberry-dacplusadc.dtbo \
hifiberry-digi.dtbo \
hifiberry-digi-pro.dtbo \
hy28a.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -779,6 +779,27 @@ Params: 24db_digital_gain Allow ga
master for bit clock and frame clock.
+Name: hifiberry-dacplusadc
+Info: Configures the HifiBerry DAC+ADC audio card
+Load: dtoverlay=hifiberry-dacplusadc,<param>=<val>
+Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec
+ Digital volume control. Enable with
+ "dtoverlay=hifiberry-dacplus,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!)
+ slave Force DAC+ Pro into slave mode, using Pi as
+ master for bit clock and frame clock.
+
+
Name: hifiberry-digi
Info: Configures the HifiBerry Digi and Digi+ audio card
Load: dtoverlay=hifiberry-digi
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
@@ -0,0 +1,71 @@
+// Definitions for HiFiBerry DAC+ADC
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target-path = "/clocks";
+ __overlay__ {
+ dacpro_osc: dacpro_osc {
+ compatible = "hifiberry,dacpro-clk";
+ #clock-cells = <0>;
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&i2s>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@2 {
+ target = <&i2c1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ pcm_codec: pcm5122@4d {
+ #sound-dai-cells = <0>;
+ compatible = "ti,pcm5122";
+ reg = <0x4d>;
+ clocks = <&dacpro_osc>;
+ AVDD-supply = <&vdd_3v3_reg>;
+ DVDD-supply = <&vdd_3v3_reg>;
+ CPVDD-supply = <&vdd_3v3_reg>;
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@3 {
+ target-path = "/";
+ __overlay__ {
+ dmic {
+ #sound-dai-cells = <0>;
+ compatible = "dmic-codec";
+ num-channels = <2>;
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@4 {
+ target = <&sound>;
+ hifiberry_dacplusadc: __overlay__ {
+ compatible = "hifiberry,hifiberry-dacplusadc";
+ i2s-controller = <&i2s>;
+ status = "okay";
+ };
+ };
+
+ __overrides__ {
+ 24db_digital_gain =
+ <&hifiberry_dacplusadc>,"hifiberry,24db_digital_gain?";
+ slave = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,slave?";
+ };
+};
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -46,6 +46,14 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
help
Say Y or M if you want to add support for HifiBerry DAC+.
+config SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC
+ tristate "Support for HifiBerry DAC+ADC"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_PCM512x_I2C
+ select SND_SOC_DMIC
+ help
+ Say Y or M if you want to add support for HifiBerry DAC+ADC.
+
config SND_BCM2708_SOC_HIFIBERRY_DIGI
tristate "Support for HifiBerry Digi"
depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -14,6 +14,7 @@ snd-soc-googlevoicehat-codec-objs := goo
# BCM2708 Machine Support
snd-soc-3dlab-nano-player-objs := 3dlab-nano-player.o
snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
+snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
snd-soc-justboom-dac-objs := justboom-dac.o
snd-soc-rpi-cirrus-objs := rpi-cirrus.o
snd-soc-rpi-proto-objs := rpi-proto.o
@@ -36,6 +37,7 @@ snd-soc-rpi-wm8804-soundcard-objs := rpi
obj-$(CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER) += snd-soc-3dlab-nano-player.o
obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-codec.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
--- /dev/null
+++ b/sound/soc/bcm/hifiberry_dacplusadc.c
@@ -0,0 +1,407 @@
+/*
+ * ASoC Driver for HiFiBerry DAC+ / DAC Pro with ADC
+ *
+ * Author: Daniel Matuschek, Stuart MacLean <stuart@hifiberry.com>
+ * Copyright 2014-2015
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ * ADC added by Joerg Schambacher <joscha@schambacher.com>
+ * Copyright 2018
+ *
+ * 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 <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/delay.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"
+
+#define HIFIBERRY_DACPRO_NOCLOCK 0
+#define HIFIBERRY_DACPRO_CLK44EN 1
+#define HIFIBERRY_DACPRO_CLK48EN 2
+
+struct platform_device *dmic_codec_dev;
+
+struct pcm512x_priv {
+ struct regmap *regmap;
+ struct clk *sclk;
+};
+
+/* Clock rate of CLK44EN attached to GPIO6 pin */
+#define CLK_44EN_RATE 22579200UL
+/* Clock rate of CLK48EN attached to GPIO3 pin */
+#define CLK_48EN_RATE 24576000UL
+
+static bool slave;
+static bool snd_rpi_hifiberry_is_dacpro;
+static bool digital_gain_0db_limit = true;
+
+static void snd_rpi_hifiberry_dacplusadc_select_clk(struct snd_soc_component *component,
+ int clk_id)
+{
+ switch (clk_id) {
+ case HIFIBERRY_DACPRO_NOCLOCK:
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
+ break;
+ case HIFIBERRY_DACPRO_CLK44EN:
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
+ break;
+ case HIFIBERRY_DACPRO_CLK48EN:
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
+ break;
+ }
+}
+
+static void snd_rpi_hifiberry_dacplusadc_clk_gpio(struct snd_soc_component *component)
+{
+ snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x24, 0x24);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02);
+}
+
+static bool snd_rpi_hifiberry_dacplusadc_is_sclk(struct snd_soc_component *component)
+{
+ unsigned int sck;
+
+ snd_soc_component_read(component, PCM512x_RATE_DET_4, &sck);
+ return (!(sck & 0x40));
+}
+
+static bool snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(
+ struct snd_soc_component *component)
+{
+ msleep(2);
+ return snd_rpi_hifiberry_dacplusadc_is_sclk(component);
+}
+
+static bool snd_rpi_hifiberry_dacplusadc_is_pro_card(struct snd_soc_component *component)
+{
+ bool isClk44EN, isClk48En, isNoClk;
+
+ snd_rpi_hifiberry_dacplusadc_clk_gpio(component);
+
+ snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK44EN);
+ isClk44EN = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
+
+ snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_NOCLOCK);
+ isNoClk = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
+
+ snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK48EN);
+ isClk48En = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
+
+ return (isClk44EN && isClk48En && !isNoClk);
+}
+
+static int snd_rpi_hifiberry_dacplusadc_clk_for_rate(int sample_rate)
+{
+ int type;
+
+ switch (sample_rate) {
+ case 11025:
+ case 22050:
+ case 44100:
+ case 88200:
+ case 176400:
+ case 352800:
+ type = HIFIBERRY_DACPRO_CLK44EN;
+ break;
+ default:
+ type = HIFIBERRY_DACPRO_CLK48EN;
+ break;
+ }
+ return type;
+}
+
+static void snd_rpi_hifiberry_dacplusadc_set_sclk(struct snd_soc_component *component,
+ int sample_rate)
+{
+ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
+
+ if (!IS_ERR(pcm512x->sclk)) {
+ int ctype;
+
+ ctype = snd_rpi_hifiberry_dacplusadc_clk_for_rate(sample_rate);
+ clk_set_rate(pcm512x->sclk, (ctype == HIFIBERRY_DACPRO_CLK44EN)
+ ? CLK_44EN_RATE : CLK_48EN_RATE);
+ snd_rpi_hifiberry_dacplusadc_select_clk(component, ctype);
+ }
+}
+
+static int snd_rpi_hifiberry_dacplusadc_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_component *component = rtd->codec_dai->component;
+ struct pcm512x_priv *priv;
+
+ if (slave)
+ snd_rpi_hifiberry_is_dacpro = false;
+ else
+ snd_rpi_hifiberry_is_dacpro =
+ snd_rpi_hifiberry_dacplusadc_is_pro_card(component);
+
+ if (snd_rpi_hifiberry_is_dacpro) {
+ struct snd_soc_dai_link *dai = rtd->dai_link;
+
+ dai->name = "HiFiBerry ADCDAC+ Pro";
+ dai->stream_name = "HiFiBerry ADCDAC+ Pro HiFi";
+ dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM;
+
+ snd_soc_component_update_bits(component, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11);
+ snd_soc_component_update_bits(component, PCM512x_MASTER_MODE, 0x03, 0x03);
+ snd_soc_component_update_bits(component, PCM512x_MASTER_CLKDIV_2, 0x7f, 63);
+ } else {
+ priv = snd_soc_component_get_drvdata(component);
+ priv->sclk = ERR_PTR(-ENOENT);
+ }
+
+ snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
+
+ if (digital_gain_0db_limit) {
+ int ret;
+ struct snd_soc_card *card = rtd->card;
+
+ ret = snd_soc_limit_volume(card, "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_hifiberry_dacplusadc_update_rate_den(
+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component = rtd->codec_dai->component;
+ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
+ struct snd_ratnum *rats_no_pll;
+ unsigned int num = 0, den = 0;
+ int err;
+
+ rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL);
+ if (!rats_no_pll)
+ return -ENOMEM;
+
+ rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
+ rats_no_pll->den_min = 1;
+ rats_no_pll->den_max = 128;
+ rats_no_pll->den_step = 1;
+
+ err = snd_interval_ratnum(hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den);
+ if (err >= 0 && den) {
+ params->rate_num = num;
+ params->rate_den = den;
+ }
+
+ devm_kfree(rtd->dev, rats_no_pll);
+ return 0;
+}
+
+static int snd_rpi_hifiberry_dacplusadc_hw_params(
+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
+{
+ int ret = 0;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int channels = params_channels(params);
+ int width = 32;
+
+ if (snd_rpi_hifiberry_is_dacpro) {
+ struct snd_soc_component *component = rtd->codec_dai->component;
+
+ width = snd_pcm_format_physical_width(params_format(params));
+
+ snd_rpi_hifiberry_dacplusadc_set_sclk(component,
+ params_rate(params));
+
+ ret = snd_rpi_hifiberry_dacplusadc_update_rate_den(
+ substream, params);
+ }
+
+ ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x03, 0x03,
+ channels, width);
+ if (ret)
+ return ret;
+ ret = snd_soc_dai_set_tdm_slot(rtd->codec_dai, 0x03, 0x03,
+ channels, width);
+ return ret;
+}
+
+static int hifiberry_dacplusadc_LED_cnt;
+
+static int snd_rpi_hifiberry_dacplusadc_startup(
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component = rtd->codec_dai->component;
+
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
+ 0x08, 0x08);
+ hifiberry_dacplusadc_LED_cnt++;
+ return 0;
+}
+
+static void snd_rpi_hifiberry_dacplusadc_shutdown(
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component = rtd->codec_dai->component;
+
+ hifiberry_dacplusadc_LED_cnt--;
+ if (!hifiberry_dacplusadc_LED_cnt)
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
+ 0x08, 0x00);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_hifiberry_dacplusadc_ops = {
+ .hw_params = snd_rpi_hifiberry_dacplusadc_hw_params,
+ .startup = snd_rpi_hifiberry_dacplusadc_startup,
+ .shutdown = snd_rpi_hifiberry_dacplusadc_shutdown,
+};
+
+static struct snd_soc_dai_link_component snd_rpi_hifiberry_dacplusadc_codecs[] = {
+ {
+ .name = "pcm512x.1-004d",
+ .dai_name = "pcm512x-hifi",
+ },
+ {
+ .name = "dmic-codec",
+ .dai_name = "dmic-hifi",
+ },
+};
+
+static struct snd_soc_dai_link snd_rpi_hifiberry_dacplusadc_dai[] = {
+{
+ .name = "HiFiBerry DAC+ADC",
+ .stream_name = "HiFiBerry DAC+ADC HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .platform_name = "bcm2708-i2s.0",
+ .codecs = snd_rpi_hifiberry_dacplusadc_codecs,
+ .num_codecs = 2,
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_rpi_hifiberry_dacplusadc_ops,
+ .init = snd_rpi_hifiberry_dacplusadc_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_hifiberry_dacplusadc = {
+ .name = "snd_rpi_hifiberry_dacplusadc",
+ .driver_name = "HifiberryDacpAdc",
+ .owner = THIS_MODULE,
+ .dai_link = snd_rpi_hifiberry_dacplusadc_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_hifiberry_dacplusadc_dai),
+};
+
+
+static int snd_rpi_hifiberry_dacplusadc_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_rpi_hifiberry_dacplusadc.dev = &pdev->dev;
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai;
+
+ dai = &snd_rpi_hifiberry_dacplusadc_dai[0];
+ i2s_node = of_parse_phandle(pdev->dev.of_node,
+ "i2s-controller", 0);
+ if (i2s_node) {
+ dai->cpu_of_node = i2s_node;
+ dai->platform_of_node = i2s_node;
+ dai->cpu_dai_name = NULL;
+ dai->platform_name = NULL;
+ }
+ dai = &snd_rpi_hifiberry_dacplusadc_dai[1];
+ i2s_node = of_parse_phandle(pdev->dev.of_node, "dmic", 0);
+ if (i2s_node) {
+ dai->cpu_of_node = i2s_node;
+ dai->platform_of_node = i2s_node;
+ }
+
+ }
+ digital_gain_0db_limit = !of_property_read_bool(
+ pdev->dev.of_node, "hifiberry,24db_digital_gain");
+ slave = of_property_read_bool(pdev->dev.of_node,
+ "hifiberry-dacplusadc,slave");
+
+ ret = devm_snd_soc_register_card(&pdev->dev,
+ &snd_rpi_hifiberry_dacplusadc);
+ if (ret && ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "snd_soc_register_card() failed: %d\n", ret);
+
+ return ret;
+}
+
+static const struct of_device_id snd_rpi_hifiberry_dacplusadc_of_match[] = {
+ { .compatible = "hifiberry,hifiberry-dacplusadc", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplusadc_of_match);
+
+static struct platform_driver snd_rpi_hifiberry_dacplusadc_driver = {
+ .driver = {
+ .name = "snd-rpi-hifiberry-dacplusadc",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_rpi_hifiberry_dacplusadc_of_match,
+ },
+ .probe = snd_rpi_hifiberry_dacplusadc_probe,
+};
+
+static int __init hifiberry_dacplusadc_init(void)
+{
+ int ret;
+
+ dmic_codec_dev = platform_device_register_simple("dmic-codec", -1, NULL,
+ 0);
+ if (IS_ERR(dmic_codec_dev)) {
+ pr_err("%s: dmic-codec device registration failed\n", __func__);
+ return PTR_ERR(dmic_codec_dev);
+ }
+
+ ret = platform_driver_register(&snd_rpi_hifiberry_dacplusadc_driver);
+ if (ret) {
+ pr_err("%s: platform driver registration failed\n", __func__);
+ platform_device_unregister(dmic_codec_dev);
+ }
+
+ return ret;
+}
+module_init(hifiberry_dacplusadc_init);
+
+static void __exit hifiberry_dacplusadc_exit(void)
+{
+ platform_driver_unregister(&snd_rpi_hifiberry_dacplusadc_driver);
+ platform_device_unregister(dmic_codec_dev);
+}
+module_exit(hifiberry_dacplusadc_exit);
+
+MODULE_AUTHOR("Joerg Schambacher <joscha@schambacher.com>");
+MODULE_AUTHOR("Daniel Matuschek <daniel@hifiberry.com>");
+MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ADC");
+MODULE_LICENSE("GPL v2");
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