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openwrt/target/linux/brcm2708/patches-4.19/950-0309-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch
Álvaro Fernández Rojas 4295485719 brcm2708: add linux 4.19 support 
Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2019-07-14 12:44:14 +02:00

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From e4b9a8f537b069bd3017f30b21bceb811263c979 Mon Sep 17 00:00:00 2001
From: HiFiBerry <info@hifiberry.com>
Date: Mon, 8 Oct 2018 18:10:12 +0200
Subject: [PATCH 309/703] 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 +++
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
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/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -905,6 +905,7 @@ CONFIG_SND_BCM2835_SOC_I2S=m
CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER=m
CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
+CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -898,6 +898,7 @@ CONFIG_SND_BCM2835_SOC_I2S=m
CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER=m
CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
+CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
--- 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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