diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile index 73826c74d2cfb5..b64dd7ac0630b2 100644 --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -7,6 +7,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ ads1115.dtbo \ ads7846.dtbo \ akkordion-iqdacplus.dtbo \ + allo-boss-dac-pcm512x-audio.dtbo \ allo-piano-dac-pcm512x-audio.dtbo \ allo-piano-dac-plus-pcm512x-audio.dtbo \ at86rf233.dtbo \ diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README index 1e3420e80d620f..c9e954253a6318 100644 --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -263,6 +263,30 @@ Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec that does not result in clipping/distortion!) +Name: allo-boss-dac-pcm512x-audio +Info: Configures the Allo Boss DAC audio cards. +Load: dtoverlay=allo-boss-dac-pcm512x-audio, +Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec + Digital volume control. Enable with + "dtoverlay=allo-boss-dac-pcm512x-audio, + 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 Boss DAC into slave mode, using Pi a + master for bit clock and frame clock. Enable + with "dtoverlay=allo-boss-dac-pcm512x-audio, + slave" + + Name: allo-piano-dac-pcm512x-audio Info: Configures the Allo Piano DAC (2.0/2.1) audio cards. (NB. This initial support is for 2.0 channel audio ONLY! ie. stereo. diff --git a/arch/arm/boot/dts/overlays/allo-boss-dac-pcm512x-audio-overlay.dts b/arch/arm/boot/dts/overlays/allo-boss-dac-pcm512x-audio-overlay.dts new file mode 100644 index 00000000000000..7df335a3d82f70 --- /dev/null +++ b/arch/arm/boot/dts/overlays/allo-boss-dac-pcm512x-audio-overlay.dts @@ -0,0 +1,58 @@ +/* + * Definitions for Allo Boss DAC board + */ + +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2708"; + + fragment@0 { + target-path = "/clocks"; + __overlay__ { + boss_osc: boss_osc { + compatible = "allo,dac-clk"; + #clock-cells = <0>; + }; + }; + }; + + 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"; + clocks = <&boss_osc>; + reg = <0x4d>; + status = "okay"; + }; + }; + }; + + fragment@3 { + target = <&sound>; + boss_dac: __overlay__ { + compatible = "allo,boss-dac"; + i2s-controller = <&i2s>; + status = "okay"; + }; + }; + + __overrides__ { + 24db_digital_gain = <&boss_dac>,"allo,24db_digital_gain?"; + slave = <&boss_dac>,"allo,slave?"; + }; +}; diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 2b6fcd8abf79da..b1b3cf5d3a09fe 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -17,6 +17,7 @@ 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-45Mhz.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-45Mhz.c b/drivers/clk/clk-allo-dac-45Mhz.c new file mode 100644 index 00000000000000..d5e9e5b3495cfd --- /dev/null +++ b/drivers/clk/clk-allo-dac-45Mhz.c @@ -0,0 +1,161 @@ +/* + * Clock Driver for Allo DAC + * + * Author: Baswaraj K + * 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 +#include +#include +#include +#include +#include +#include + +/* 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_ROOT | 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/Kconfig b/sound/soc/bcm/Kconfig index 4c647abe750454..76cb7626d7651b 100644 --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -175,6 +175,14 @@ config SND_BCM2708_SOC_FE_PI_AUDIO help Say Y or M if you want to add support for Fe-Pi-Audio. +config SND_BCM2708_SOC_ALLO_BOSS_DAC + tristate "Support for allo Boss DAC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_PCM512x_I2C + help + Say Y or M if you want to add support for allo Boss DAC. + + config SND_PISOUND tristate "Support for Blokas Labs pisound" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile index 54b4111ad820b3..72e1620fa40380 100644 --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -31,6 +31,7 @@ snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o snd-soc-dionaudio-loco-objs := dionaudio_loco.o snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o +snd-soc-allo-boss-dac-objs := allo-boss-dac.o snd-soc-allo-piano-dac-objs := allo-piano-dac.o snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o snd-soc-pisound-objs := pisound.o @@ -56,6 +57,7 @@ obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-sou obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o diff --git a/sound/soc/bcm/allo-boss-dac.c b/sound/soc/bcm/allo-boss-dac.c new file mode 100644 index 00000000000000..c080e31065d99a --- /dev/null +++ b/sound/soc/bcm/allo-boss-dac.c @@ -0,0 +1,374 @@ +/* + * ALSA ASoC Machine Driver for Allo Boss DAC + * + * Author: Baswaraj K + * Copyright 2016 + * based on code by Daniel Matuschek, Stuart MacLean + * based on code by Florian Meier + * + * 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 +#include +#include +#include + +#include +#include +#include +#include +#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; +}; + +/* 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_codec *codec, + int clk_id) +{ + switch (clk_id) { + case ALLO_BOSS_NOCLOCK: + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x00); + break; + case ALLO_BOSS_CLK44EN: + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x20); + break; + case ALLO_BOSS_CLK48EN: + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x04); + break; + } +} + +static void snd_allo_boss_clk_gpio(struct snd_soc_codec *codec) +{ + snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x24, 0x24); + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02); + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02); +} + +static bool snd_allo_boss_is_sclk(struct snd_soc_codec *codec) +{ + int sck; + + sck = snd_soc_read(codec, PCM512x_RATE_DET_4); + return (!(sck & 0x40)); +} + +static bool snd_allo_boss_is_sclk_sleep( + struct snd_soc_codec *codec) +{ + msleep(2); + return snd_allo_boss_is_sclk(codec); +} + +static bool snd_allo_boss_is_master_card(struct snd_soc_codec *codec) +{ + bool isClk44EN, isClk48En, isNoClk; + + snd_allo_boss_clk_gpio(codec); + + snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK44EN); + isClk44EN = snd_allo_boss_is_sclk_sleep(codec); + + snd_allo_boss_select_clk(codec, ALLO_BOSS_NOCLOCK); + isNoClk = snd_allo_boss_is_sclk_sleep(codec); + + snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK48EN); + isClk48En = snd_allo_boss_is_sclk_sleep(codec); + + 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: + type = ALLO_BOSS_CLK44EN; + break; + default: + type = ALLO_BOSS_CLK48EN; + break; + } + return type; +} + +static void snd_allo_boss_set_sclk(struct snd_soc_codec *codec, + int sample_rate) +{ + struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); + + 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(codec, ctype); + } +} + +static int snd_allo_boss_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_codec *codec = rtd->codec; + struct pcm512x_priv *priv; + + if (slave) + snd_soc_allo_boss_master = false; + else + snd_soc_allo_boss_master = + snd_allo_boss_is_master_card(codec); + + if (snd_soc_allo_boss_master) { + struct snd_soc_dai_link *dai = rtd->dai_link; + + dai->name = "BossDAC"; + dai->stream_name = "BossDAC"; + dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF + | SND_SOC_DAIFMT_CBM_CFM; + + snd_soc_update_bits(codec, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11); + snd_soc_update_bits(codec, PCM512x_MASTER_MODE, 0x03, 0x03); + snd_soc_update_bits(codec, PCM512x_MASTER_CLKDIV_2, 0x7f, 63); + } else { + priv = snd_soc_codec_get_drvdata(codec); + priv->sclk = ERR_PTR(-ENOENT); + } + + snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08); + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0x0f, 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; + + 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_codec *codec = rtd->codec; + struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); + 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_allo_boss_set_bclk_ratio_pro( + struct snd_soc_dai *cpu_dai, struct snd_pcm_hw_params *params) +{ + int bratio = snd_pcm_format_physical_width(params_format(params)) + * params_channels(params); + return snd_soc_dai_set_bclk_ratio(cpu_dai, bratio); +} + +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; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int sample_bits = + snd_pcm_format_physical_width(params_format(params)); + + if (snd_soc_allo_boss_master) { + struct snd_soc_codec *codec = rtd->codec; + + snd_allo_boss_set_sclk(codec, + params_rate(params)); + + ret = snd_allo_boss_set_bclk_ratio_pro(cpu_dai, + params); + if (!ret) + ret = snd_allo_boss_update_rate_den( + substream, params); + } else { + if (snd_allo_boss_is_sclk(rtd->codec)) { + snd_soc_update_bits(rtd->codec, PCM512x_PLL_EN, + PCM512x_PLLE, 0x01); + snd_soc_update_bits(rtd->codec, PCM512x_PLL_REF, + PCM512x_SREF, PCM512x_SREF_BCK); + dev_dbg(rtd->codec->dev, + "Setting BCLK as input clock and Enable PLL\n"); + } else { + snd_soc_update_bits(rtd->codec, PCM512x_PLL_EN, + PCM512x_PLLE, 0x00); + snd_soc_update_bits(rtd->codec, PCM512x_PLL_REF, + PCM512x_SREF, PCM512x_SREF_SCK); + + dev_dbg(rtd->codec->dev, + "Setting SCLK as input clock and disabled PLL\n"); + } + + ret = snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); + } + 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_codec *codec = rtd->codec; + + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); + 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_codec *codec = rtd->codec; + + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x00); +} + +/* 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, +}; + +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"); + } + + ret = snd_soc_register_card(&snd_allo_boss); + if (ret) + dev_err(&pdev->dev, + "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static int snd_allo_boss_remove(struct platform_device *pdev) +{ + 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 "); +MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC"); +MODULE_LICENSE("GPL v2");