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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0266-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0266-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch576
1 files changed, 576 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0266-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch b/target/linux/brcm2708/patches-4.19/950-0266-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch
new file mode 100644
index 0000000000..9cd839e045
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0266-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch
@@ -0,0 +1,576 @@
+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");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 19:43:37 +0000