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-rw-r--r--sys-kernel/boest-v5.0.15/raspberrypi/0074-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch673
1 files changed, 673 insertions, 0 deletions
diff --git a/sys-kernel/boest-v5.0.15/raspberrypi/0074-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch b/sys-kernel/boest-v5.0.15/raspberrypi/0074-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch
new file mode 100644
index 00000000..49f18c65
--- /dev/null
+++ b/sys-kernel/boest-v5.0.15/raspberrypi/0074-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch
@@ -0,0 +1,673 @@
+From f4b0818510d107e6c6a78708e0eba7b70243b8c4 Mon Sep 17 00:00:00 2001
+From: BabuSubashChandar <babuenir@gmail.com>
+Date: Tue, 28 Mar 2017 20:04:42 +0530
+Subject: [PATCH 074/194] Add support for Allo Boss DAC add-on board for
+ Raspberry Pi. (#1924)
+
+Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
+Reviewed-by: Deepak <deepak@zilogic.com>
+Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
+
+Add support for new clock rate and mute gpios.
+
+Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
+Reviewed-by: Deepak <deepak@zilogic.com>
+Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
+
+ASoC: allo-boss-dac: fix S24_LE format
+
+Remove set_bclk_ratio call so 24-bit data is transmitted in
+24 bclk cycles.
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+
+ASoC: allo-boss-dac: transmit S24_LE with 64 BCLK cycles
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+---
+ drivers/clk/Makefile | 1 +
+ drivers/clk/clk-allo-dac.c | 161 ++++++++++++
+ sound/soc/bcm/allo-boss-dac.c | 456 ++++++++++++++++++++++++++++++++++
+ 3 files changed, 618 insertions(+)
+
+diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
+index 6ff777459738..03b443ed4b9d 100644
+--- a/drivers/clk/Makefile
++++ b/drivers/clk/Makefile
+@@ -18,6 +18,7 @@ endif
+
+ # hardware specific clock types
+ # please keep this section sorted lexicographically by file path name
++obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += clk-allo-dac.o
+ obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o
+ obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o
+ obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o
+diff --git a/drivers/clk/clk-allo-dac.c b/drivers/clk/clk-allo-dac.c
+new file mode 100644
+index 000000000000..0baf821d6947
+--- /dev/null
++++ b/drivers/clk/clk-allo-dac.c
+@@ -0,0 +1,161 @@
++/*
++ * Clock Driver for Allo DAC
++ *
++ * Author: Baswaraj K <jaikumar@cem-solutions.net>
++ * Copyright 2016
++ * based on code by Stuart MacLean
++ *
++ * 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/clk-provider.h>
++#include <linux/clkdev.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/slab.h>
++#include <linux/platform_device.h>
++
++/* Clock rate of CLK44EN attached to GPIO6 pin */
++#define CLK_44EN_RATE 45158400UL
++/* Clock rate of CLK48EN attached to GPIO3 pin */
++#define CLK_48EN_RATE 49152000UL
++
++/**
++ * struct allo_dac_clk - Common struct to the Allo DAC
++ * @hw: clk_hw for the common clk framework
++ * @mode: 0 => CLK44EN, 1 => CLK48EN
++ */
++struct clk_allo_hw {
++ struct clk_hw hw;
++ uint8_t mode;
++};
++
++#define to_allo_clk(_hw) container_of(_hw, struct clk_allo_hw, hw)
++
++static const struct of_device_id clk_allo_dac_dt_ids[] = {
++ { .compatible = "allo,dac-clk",},
++ { }
++};
++MODULE_DEVICE_TABLE(of, clk_allo_dac_dt_ids);
++
++static unsigned long clk_allo_dac_recalc_rate(struct clk_hw *hw,
++ unsigned long parent_rate)
++{
++ return (to_allo_clk(hw)->mode == 0) ? CLK_44EN_RATE :
++ CLK_48EN_RATE;
++}
++
++static long clk_allo_dac_round_rate(struct clk_hw *hw,
++ unsigned long rate, unsigned long *parent_rate)
++{
++ long actual_rate;
++
++ if (rate <= CLK_44EN_RATE) {
++ actual_rate = (long)CLK_44EN_RATE;
++ } else if (rate >= CLK_48EN_RATE) {
++ actual_rate = (long)CLK_48EN_RATE;
++ } else {
++ long diff44Rate = (long)(rate - CLK_44EN_RATE);
++ long diff48Rate = (long)(CLK_48EN_RATE - rate);
++
++ if (diff44Rate < diff48Rate)
++ actual_rate = (long)CLK_44EN_RATE;
++ else
++ actual_rate = (long)CLK_48EN_RATE;
++ }
++ return actual_rate;
++}
++
++
++static int clk_allo_dac_set_rate(struct clk_hw *hw,
++ unsigned long rate, unsigned long parent_rate)
++{
++ unsigned long actual_rate;
++ struct clk_allo_hw *clk = to_allo_clk(hw);
++
++ actual_rate = (unsigned long)clk_allo_dac_round_rate(hw, rate,
++ &parent_rate);
++ clk->mode = (actual_rate == CLK_44EN_RATE) ? 0 : 1;
++ return 0;
++}
++
++
++const struct clk_ops clk_allo_dac_rate_ops = {
++ .recalc_rate = clk_allo_dac_recalc_rate,
++ .round_rate = clk_allo_dac_round_rate,
++ .set_rate = clk_allo_dac_set_rate,
++};
++
++static int clk_allo_dac_probe(struct platform_device *pdev)
++{
++ int ret;
++ struct clk_allo_hw *proclk;
++ struct clk *clk;
++ struct device *dev;
++ struct clk_init_data init;
++
++ dev = &pdev->dev;
++
++ proclk = kzalloc(sizeof(struct clk_allo_hw), GFP_KERNEL);
++ if (!proclk)
++ return -ENOMEM;
++
++ init.name = "clk-allo-dac";
++ init.ops = &clk_allo_dac_rate_ops;
++ init.flags = CLK_IS_BASIC;
++ init.parent_names = NULL;
++ init.num_parents = 0;
++
++ proclk->mode = 0;
++ proclk->hw.init = &init;
++
++ clk = devm_clk_register(dev, &proclk->hw);
++ if (!IS_ERR(clk)) {
++ ret = of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
++ clk);
++ } else {
++ dev_err(dev, "Fail to register clock driver\n");
++ kfree(proclk);
++ ret = PTR_ERR(clk);
++ }
++ return ret;
++}
++
++static int clk_allo_dac_remove(struct platform_device *pdev)
++{
++ of_clk_del_provider(pdev->dev.of_node);
++ return 0;
++}
++
++static struct platform_driver clk_allo_dac_driver = {
++ .probe = clk_allo_dac_probe,
++ .remove = clk_allo_dac_remove,
++ .driver = {
++ .name = "clk-allo-dac",
++ .of_match_table = clk_allo_dac_dt_ids,
++ },
++};
++
++static int __init clk_allo_dac_init(void)
++{
++ return platform_driver_register(&clk_allo_dac_driver);
++}
++core_initcall(clk_allo_dac_init);
++
++static void __exit clk_allo_dac_exit(void)
++{
++ platform_driver_unregister(&clk_allo_dac_driver);
++}
++module_exit(clk_allo_dac_exit);
++
++MODULE_DESCRIPTION("Allo DAC clock driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:clk-allo-dac");
+diff --git a/sound/soc/bcm/allo-boss-dac.c b/sound/soc/bcm/allo-boss-dac.c
+new file mode 100644
+index 000000000000..6f3509e27e3e
+--- /dev/null
++++ b/sound/soc/bcm/allo-boss-dac.c
+@@ -0,0 +1,456 @@
++/*
++ * ALSA ASoC Machine Driver for Allo Boss DAC
++ *
++ * Author: Baswaraj K <jaikumar@cem-solutions.net>
++ * Copyright 2017
++ * based on code by Daniel Matuschek,
++ * Stuart MacLean <stuart@hifiberry.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/gpio/consumer.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++#include <linux/delay.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++#include "../codecs/pcm512x.h"
++
++#define ALLO_BOSS_NOCLOCK 0
++#define ALLO_BOSS_CLK44EN 1
++#define ALLO_BOSS_CLK48EN 2
++
++struct pcm512x_priv {
++ struct regmap *regmap;
++ struct clk *sclk;
++};
++
++static struct gpio_desc *mute_gpio;
++
++/* Clock rate of CLK44EN attached to GPIO6 pin */
++#define CLK_44EN_RATE 45158400UL
++/* Clock rate of CLK48EN attached to GPIO3 pin */
++#define CLK_48EN_RATE 49152000UL
++
++static bool slave;
++static bool snd_soc_allo_boss_master;
++static bool digital_gain_0db_limit = true;
++
++static void snd_allo_boss_select_clk(struct snd_soc_component *component,
++ int clk_id)
++{
++ switch (clk_id) {
++ case ALLO_BOSS_NOCLOCK:
++ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
++ break;
++ case ALLO_BOSS_CLK44EN:
++ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
++ break;
++ case ALLO_BOSS_CLK48EN:
++ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
++ break;
++ }
++}
++
++static void snd_allo_boss_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_allo_boss_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_allo_boss_is_sclk_sleep(
++ struct snd_soc_component *component)
++{
++ msleep(2);
++ return snd_allo_boss_is_sclk(component);
++}
++
++static bool snd_allo_boss_is_master_card(struct snd_soc_component *component)
++{
++ bool isClk44EN, isClk48En, isNoClk;
++
++ snd_allo_boss_clk_gpio(component);
++
++ snd_allo_boss_select_clk(component, ALLO_BOSS_CLK44EN);
++ isClk44EN = snd_allo_boss_is_sclk_sleep(component);
++
++ snd_allo_boss_select_clk(component, ALLO_BOSS_NOCLOCK);
++ isNoClk = snd_allo_boss_is_sclk_sleep(component);
++
++ snd_allo_boss_select_clk(component, ALLO_BOSS_CLK48EN);
++ isClk48En = snd_allo_boss_is_sclk_sleep(component);
++
++ return (isClk44EN && isClk48En && !isNoClk);
++}
++
++static int snd_allo_boss_clk_for_rate(int sample_rate)
++{
++ int type;
++
++ switch (sample_rate) {
++ case 11025:
++ case 22050:
++ case 44100:
++ case 88200:
++ case 176400:
++ case 352800:
++ type = ALLO_BOSS_CLK44EN;
++ break;
++ default:
++ type = ALLO_BOSS_CLK48EN;
++ break;
++ }
++ return type;
++}
++
++static void snd_allo_boss_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_allo_boss_clk_for_rate(sample_rate);
++ clk_set_rate(pcm512x->sclk, (ctype == ALLO_BOSS_CLK44EN)
++ ? CLK_44EN_RATE : CLK_48EN_RATE);
++ snd_allo_boss_select_clk(component, ctype);
++ }
++}
++
++static int snd_allo_boss_init(struct snd_soc_pcm_runtime *rtd)
++{
++ struct snd_soc_component *component = rtd->codec_dai->component;
++ struct pcm512x_priv *priv = snd_soc_component_get_drvdata(component);
++
++ if (slave)
++ snd_soc_allo_boss_master = false;
++ else
++ snd_soc_allo_boss_master =
++ snd_allo_boss_is_master_card(component);
++
++ if (snd_soc_allo_boss_master) {
++ struct snd_soc_dai_link *dai = rtd->dai_link;
++
++ dai->name = "BossDAC";
++ dai->stream_name = "Boss DAC HiFi [Master]";
++ 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);
++ /*
++ * Default sclk to CLK_48EN_RATE, otherwise codec
++ * pcm512x_dai_startup_master method could call
++ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
++ * which will mask 384k sample rate.
++ */
++ if (!IS_ERR(priv->sclk))
++ clk_set_rate(priv->sclk, CLK_48EN_RATE);
++ } else {
++ 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_allo_boss_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 void snd_allo_boss_gpio_mute(struct snd_soc_card *card)
++{
++ if (mute_gpio)
++ gpiod_set_value_cansleep(mute_gpio, 1);
++}
++
++static void snd_allo_boss_gpio_unmute(struct snd_soc_card *card)
++{
++ if (mute_gpio)
++ gpiod_set_value_cansleep(mute_gpio, 0);
++}
++
++static int snd_allo_boss_set_bias_level(struct snd_soc_card *card,
++ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
++{
++ struct snd_soc_pcm_runtime *rtd;
++ struct snd_soc_dai *codec_dai;
++
++ rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
++ codec_dai = rtd->codec_dai;
++
++ if (dapm->dev != codec_dai->dev)
++ return 0;
++
++ switch (level) {
++ case SND_SOC_BIAS_PREPARE:
++ if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
++ break;
++ /* UNMUTE DAC */
++ snd_allo_boss_gpio_unmute(card);
++ break;
++
++ case SND_SOC_BIAS_STANDBY:
++ if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
++ break;
++ /* MUTE DAC */
++ snd_allo_boss_gpio_mute(card);
++ break;
++
++ default:
++ break;
++ }
++
++ return 0;
++}
++
++static int snd_allo_boss_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 = snd_pcm_format_physical_width(params_format(params));
++
++ if (snd_soc_allo_boss_master) {
++ struct snd_soc_component *component = rtd->codec_dai->component;
++
++ snd_allo_boss_set_sclk(component,
++ params_rate(params));
++
++ ret = snd_allo_boss_update_rate_den(
++ substream, params);
++ if (ret)
++ return ret;
++ }
++
++ 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 snd_allo_boss_startup(
++ struct snd_pcm_substream *substream)
++{
++ struct snd_soc_pcm_runtime *rtd = substream->private_data;
++ struct snd_soc_component *component = rtd->codec_dai->component;
++ struct snd_soc_card *card = rtd->card;
++
++ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
++ snd_allo_boss_gpio_mute(card);
++
++ if (snd_soc_allo_boss_master) {
++ struct pcm512x_priv *priv = snd_soc_component_get_drvdata(component);
++ /*
++ * Default sclk to CLK_48EN_RATE, otherwise codec
++ * pcm512x_dai_startup_master method could call
++ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
++ * which will mask 384k sample rate.
++ */
++ if (!IS_ERR(priv->sclk))
++ clk_set_rate(priv->sclk, CLK_48EN_RATE);
++ }
++
++ return 0;
++}
++
++static void snd_allo_boss_shutdown(
++ 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, 0x00);
++}
++
++static int snd_allo_boss_prepare(
++ struct snd_pcm_substream *substream)
++{
++ struct snd_soc_pcm_runtime *rtd = substream->private_data;
++ struct snd_soc_card *card = rtd->card;
++
++ snd_allo_boss_gpio_unmute(card);
++ return 0;
++}
++/* machine stream operations */
++static struct snd_soc_ops snd_allo_boss_ops = {
++ .hw_params = snd_allo_boss_hw_params,
++ .startup = snd_allo_boss_startup,
++ .shutdown = snd_allo_boss_shutdown,
++ .prepare = snd_allo_boss_prepare,
++};
++
++static struct snd_soc_dai_link snd_allo_boss_dai[] = {
++{
++ .name = "Boss DAC",
++ .stream_name = "Boss 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_allo_boss_ops,
++ .init = snd_allo_boss_init,
++},
++};
++
++/* audio machine driver */
++static struct snd_soc_card snd_allo_boss = {
++ .name = "BossDAC",
++ .owner = THIS_MODULE,
++ .dai_link = snd_allo_boss_dai,
++ .num_links = ARRAY_SIZE(snd_allo_boss_dai),
++};
++
++static int snd_allo_boss_probe(struct platform_device *pdev)
++{
++ int ret = 0;
++
++ snd_allo_boss.dev = &pdev->dev;
++
++ if (pdev->dev.of_node) {
++ struct device_node *i2s_node;
++ struct snd_soc_dai_link *dai;
++
++ dai = &snd_allo_boss_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, "allo,24db_digital_gain");
++ slave = of_property_read_bool(pdev->dev.of_node,
++ "allo,slave");
++
++ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute",
++ GPIOD_OUT_LOW);
++ if (IS_ERR(mute_gpio)) {
++ ret = PTR_ERR(mute_gpio);
++ dev_err(&pdev->dev,
++ "failed to get mute gpio: %d\n", ret);
++ return ret;
++ }
++
++ if (mute_gpio)
++ snd_allo_boss.set_bias_level =
++ snd_allo_boss_set_bias_level;
++
++ ret = snd_soc_register_card(&snd_allo_boss);
++ if (ret) {
++ dev_err(&pdev->dev,
++ "snd_soc_register_card() failed: %d\n", ret);
++ return ret;
++ }
++
++ if (mute_gpio)
++ snd_allo_boss_gpio_mute(&snd_allo_boss);
++
++ return 0;
++ }
++
++ return -EINVAL;
++}
++
++static int snd_allo_boss_remove(struct platform_device *pdev)
++{
++ snd_allo_boss_gpio_mute(&snd_allo_boss);
++ return snd_soc_unregister_card(&snd_allo_boss);
++}
++
++static const struct of_device_id snd_allo_boss_of_match[] = {
++ { .compatible = "allo,boss-dac", },
++ { /* sentinel */ },
++};
++MODULE_DEVICE_TABLE(of, snd_allo_boss_of_match);
++
++static struct platform_driver snd_allo_boss_driver = {
++ .driver = {
++ .name = "snd-allo-boss-dac",
++ .owner = THIS_MODULE,
++ .of_match_table = snd_allo_boss_of_match,
++ },
++ .probe = snd_allo_boss_probe,
++ .remove = snd_allo_boss_remove,
++};
++
++module_platform_driver(snd_allo_boss_driver);
++
++MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>");
++MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC");
++MODULE_LICENSE("GPL v2");