diff options
Diffstat (limited to 'sound/soc/atmel/atmel-classd.c')
| -rw-r--r-- | sound/soc/atmel/atmel-classd.c | 679 |
1 files changed, 679 insertions, 0 deletions
diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c new file mode 100644 index 000000000000..8276675730ef --- /dev/null +++ b/sound/soc/atmel/atmel-classd.c @@ -0,0 +1,679 @@ +/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver + * + * Copyright (C) 2015 Atmel + * + * Author: Songjun Wu <songjun.wu@atmel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 or later + * as published by the Free Software Foundation. + */ + +#include <linux/of.h> +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <sound/core.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm_params.h> +#include <sound/tlv.h> +#include "atmel-classd.h" + +struct atmel_classd_pdata { + bool non_overlap_enable; + int non_overlap_time; + int pwm_type; + const char *card_name; +}; + +struct atmel_classd { + dma_addr_t phy_base; + struct regmap *regmap; + struct clk *pclk; + struct clk *gclk; + struct clk *aclk; + int irq; + const struct atmel_classd_pdata *pdata; +}; + +#ifdef CONFIG_OF +static const struct of_device_id atmel_classd_of_match[] = { + { + .compatible = "atmel,sama5d2-classd", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, atmel_classd_of_match); + +static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct atmel_classd_pdata *pdata; + const char *pwm_type; + int ret; + + if (!np) { + dev_err(dev, "device node not found\n"); + return ERR_PTR(-EINVAL); + } + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type); + if ((ret == 0) && (strcmp(pwm_type, "diff") == 0)) + pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF; + else + pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE; + + ret = of_property_read_u32(np, + "atmel,non-overlap-time", &pdata->non_overlap_time); + if (ret) + pdata->non_overlap_enable = false; + else + pdata->non_overlap_enable = true; + + ret = of_property_read_string(np, "atmel,model", &pdata->card_name); + if (ret) + pdata->card_name = "CLASSD"; + + return pdata; +} +#else +static inline struct atmel_classd_pdata * +atmel_classd_dt_init(struct device *dev) +{ + return ERR_PTR(-EINVAL); +} +#endif + +#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \ + | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \ + | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \ + | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \ + | SNDRV_PCM_RATE_96000) + +static const struct snd_pcm_hardware atmel_classd_hw = { + .info = SNDRV_PCM_INFO_MMAP + | SNDRV_PCM_INFO_MMAP_VALID + | SNDRV_PCM_INFO_INTERLEAVED + | SNDRV_PCM_INFO_RESUME + | SNDRV_PCM_INFO_PAUSE, + .formats = (SNDRV_PCM_FMTBIT_S16_LE), + .rates = ATMEL_CLASSD_RATES, + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = 64 * 1024, + .period_bytes_min = 256, + .period_bytes_max = 32 * 1024, + .periods_min = 2, + .periods_max = 256, +}; + +#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024) + +/* cpu dai component */ +static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + regmap_write(dd->regmap, CLASSD_THR, 0x0); + + return clk_prepare_enable(dd->pclk); +} + +static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + clk_disable_unprepare(dd->pclk); +} + +static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = { + .startup = atmel_classd_cpu_dai_startup, + .shutdown = atmel_classd_cpu_dai_shutdown, +}; + +static struct snd_soc_dai_driver atmel_classd_cpu_dai = { + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = ATMEL_CLASSD_RATES, + .formats = SNDRV_PCM_FMTBIT_S16_LE,}, + .ops = &atmel_classd_cpu_dai_ops, +}; + +static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = { + .name = "atmel-classd", +}; + +/* platform */ +static int +atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct dma_slave_config *slave_config) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + if (params_physical_width(params) != 16) { + dev_err(rtd->platform->dev, + "only supports 16-bit audio data\n"); + return -EINVAL; + } + + slave_config->direction = DMA_MEM_TO_DEV; + slave_config->dst_addr = dd->phy_base + CLASSD_THR; + slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + slave_config->dst_maxburst = 1; + slave_config->src_maxburst = 1; + slave_config->device_fc = false; + + return 0; +} + +static const struct snd_dmaengine_pcm_config +atmel_classd_dmaengine_pcm_config = { + .prepare_slave_config = atmel_classd_platform_configure_dma, + .pcm_hardware = &atmel_classd_hw, + .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE, +}; + +/* codec */ +static const char * const mono_mode_text[] = { + "mix", "sat", "left", "right" +}; + +static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum, + CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT, + mono_mode_text); + +static const char * const eqcfg_text[] = { + "Treble-12dB", "Treble-6dB", + "Medium-8dB", "Medium-3dB", + "Bass-12dB", "Bass-6dB", + "0 dB", + "Bass+6dB", "Bass+12dB", + "Medium+3dB", "Medium+8dB", + "Treble+6dB", "Treble+12dB", +}; + +static const unsigned int eqcfg_value[] = { + CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6, + CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3, + CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6, + CLASSD_INTPMR_EQCFG_FLAT, + CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12, + CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8, + CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12, +}; + +static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum, + CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf, + eqcfg_text, eqcfg_value); + +static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1); + +static const struct snd_kcontrol_new atmel_classd_snd_controls[] = { +SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR, + CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT, + 78, 1, classd_digital_tlv), + +SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR, + CLASSD_INTPMR_DEEMP_SHIFT, 1, 0), + +SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0), + +SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0), + +SOC_ENUM("Mono Mode", classd_mono_mode_enum), + +SOC_ENUM("EQ", classd_eqcfg_enum), +}; + +static const char * const pwm_type[] = { + "Single ended", "Differential" +}; + +static int atmel_classd_codec_probe(struct snd_soc_codec *codec) +{ + struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec); + struct atmel_classd *dd = snd_soc_card_get_drvdata(card); + const struct atmel_classd_pdata *pdata = dd->pdata; + u32 mask, val; + + mask = CLASSD_MR_PWMTYP_MASK; + val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT; + + mask |= CLASSD_MR_NON_OVERLAP_MASK; + if (pdata->non_overlap_enable) { + val |= (CLASSD_MR_NON_OVERLAP_EN + << CLASSD_MR_NON_OVERLAP_SHIFT); + + mask |= CLASSD_MR_NOVR_VAL_MASK; + switch (pdata->non_overlap_time) { + case 5: + val |= (CLASSD_MR_NOVR_VAL_5NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 10: + val |= (CLASSD_MR_NOVR_VAL_10NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 15: + val |= (CLASSD_MR_NOVR_VAL_15NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 20: + val |= (CLASSD_MR_NOVR_VAL_20NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + default: + val |= (CLASSD_MR_NOVR_VAL_10NS + << CLASSD_MR_NOVR_VAL_SHIFT); + dev_warn(codec->dev, + "non-overlapping value %d is invalid, the default value 10 is specified\n", + pdata->non_overlap_time); + break; + } + } + + snd_soc_update_bits(codec, CLASSD_MR, mask, val); + + dev_info(codec->dev, + "PWM modulation type is %s, non-overlapping is %s\n", + pwm_type[pdata->pwm_type], + pdata->non_overlap_enable?"enabled":"disabled"); + + return 0; +} + +static struct regmap *atmel_classd_codec_get_remap(struct device *dev) +{ + return dev_get_regmap(dev, NULL); +} + +static struct snd_soc_codec_driver soc_codec_dev_classd = { + .probe = atmel_classd_codec_probe, + .controls = atmel_classd_snd_controls, + .num_controls = ARRAY_SIZE(atmel_classd_snd_controls), + .get_regmap = atmel_classd_codec_get_remap, +}; + +/* codec dai component */ +static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + int ret; + + ret = clk_prepare_enable(dd->aclk); + if (ret) + return ret; + + return clk_prepare_enable(dd->gclk); +} + +static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai, + int mute) +{ + struct snd_soc_codec *codec = codec_dai->codec; + u32 mask, val; + + mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK; + + if (mute) + val = mask; + else + val = 0; + + snd_soc_update_bits(codec, CLASSD_MR, mask, val); + + return 0; +} + +#define CLASSD_ACLK_RATE_11M2896_MPY_8 (112896 * 100 * 8) +#define CLASSD_ACLK_RATE_12M288_MPY_8 (12228 * 1000 * 8) + +static struct { + int rate; + int sample_rate; + int dsp_clk; + unsigned long aclk_rate; +} const sample_rates[] = { + { 8000, CLASSD_INTPMR_FRAME_8K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 }, + { 16000, CLASSD_INTPMR_FRAME_16K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 }, + { 32000, CLASSD_INTPMR_FRAME_32K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 }, + { 48000, CLASSD_INTPMR_FRAME_48K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 }, + { 96000, CLASSD_INTPMR_FRAME_96K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 }, + { 22050, CLASSD_INTPMR_FRAME_22K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 }, + { 44100, CLASSD_INTPMR_FRAME_44K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 }, + { 88200, CLASSD_INTPMR_FRAME_88K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 }, +}; + +static int +atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_codec *codec = codec_dai->codec; + int fs; + int i, best, best_val, cur_val, ret; + u32 mask, val; + + fs = params_rate(params); + + best = 0; + best_val = abs(fs - sample_rates[0].rate); + for (i = 1; i < ARRAY_SIZE(sample_rates); i++) { + /* Closest match */ + cur_val = abs(fs - sample_rates[i].rate); + if (cur_val < best_val) { + best = i; + best_val = cur_val; + } + } + + dev_dbg(codec->dev, + "Selected SAMPLE_RATE of %dHz, ACLK_RATE of %ldHz\n", + sample_rates[best].rate, sample_rates[best].aclk_rate); + + clk_disable_unprepare(dd->gclk); + clk_disable_unprepare(dd->aclk); + + ret = clk_set_rate(dd->aclk, sample_rates[best].aclk_rate); + if (ret) + return ret; + + mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK; + val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT) + | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT); + + snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val); + + ret = clk_prepare_enable(dd->aclk); + if (ret) + return ret; + + return clk_prepare_enable(dd->gclk); +} + +static void +atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + clk_disable_unprepare(dd->gclk); + clk_disable_unprepare(dd->aclk); +} + +static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_codec *codec = codec_dai->codec; + + snd_soc_update_bits(codec, CLASSD_MR, + CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK, + (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) + |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT)); + + return 0; +} + +static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *codec_dai) +{ + struct snd_soc_codec *codec = codec_dai->codec; + u32 mask, val; + + mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + val = mask; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) + | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT); + break; + default: + return -EINVAL; + } + + snd_soc_update_bits(codec, CLASSD_MR, mask, val); + + return 0; +} + +static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = { + .digital_mute = atmel_classd_codec_dai_digital_mute, + .startup = atmel_classd_codec_dai_startup, + .shutdown = atmel_classd_codec_dai_shutdown, + .hw_params = atmel_classd_codec_dai_hw_params, + .prepare = atmel_classd_codec_dai_prepare, + .trigger = atmel_classd_codec_dai_trigger, +}; + +#define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi" + +static struct snd_soc_dai_driver atmel_classd_codec_dai = { + .name = ATMEL_CLASSD_CODEC_DAI_NAME, + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = ATMEL_CLASSD_RATES, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .ops = &atmel_classd_codec_dai_ops, +}; + +/* ASoC sound card */ +static int atmel_classd_asoc_card_init(struct device *dev, + struct snd_soc_card *card) +{ + struct snd_soc_dai_link *dai_link; + struct atmel_classd *dd = snd_soc_card_get_drvdata(card); + + dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); + if (!dai_link) + return -ENOMEM; + + dai_link->name = "CLASSD"; + dai_link->stream_name = "CLASSD PCM"; + dai_link->codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME; + dai_link->cpu_dai_name = dev_name(dev); + dai_link->codec_name = dev_name(dev); + dai_link->platform_name = dev_name(dev); + + card->dai_link = dai_link; + card->num_links = 1; + card->name = dd->pdata->card_name; + card->dev = dev; + + return 0; +}; + +/* regmap configuration */ +static const struct reg_default atmel_classd_reg_defaults[] = { + { CLASSD_INTPMR, 0x00301212 }, +}; + +#define ATMEL_CLASSD_REG_MAX 0xE4 +static const struct regmap_config atmel_classd_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = ATMEL_CLASSD_REG_MAX, + + .cache_type = REGCACHE_FLAT, + .reg_defaults = atmel_classd_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults), +}; + +static int atmel_classd_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct atmel_classd *dd; + struct resource *res; + void __iomem *io_base; + const struct atmel_classd_pdata *pdata; + struct snd_soc_card *card; + int ret; + + pdata = dev_get_platdata(dev); + if (!pdata) { + pdata = atmel_classd_dt_init(dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } + + dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); + if (!dd) + return -ENOMEM; + + dd->pdata = pdata; + + dd->irq = platform_get_irq(pdev, 0); + if (dd->irq < 0) { + ret = dd->irq; + dev_err(dev, "failed to could not get irq: %d\n", ret); + return ret; + } + + dd->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(dd->pclk)) { + ret = PTR_ERR(dd->pclk); + dev_err(dev, "failed to get peripheral clock: %d\n", ret); + return ret; + } + + dd->gclk = devm_clk_get(dev, "gclk"); + if (IS_ERR(dd->gclk)) { + ret = PTR_ERR(dd->gclk); + dev_err(dev, "failed to get GCK clock: %d\n", ret); + return ret; + } + + dd->aclk = devm_clk_get(dev, "aclk"); + if (IS_ERR(dd->aclk)) { + ret = PTR_ERR(dd->aclk); + dev_err(dev, "failed to get audio clock: %d\n", ret); + return ret; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "no memory resource\n"); + return -ENXIO; + } + + io_base = devm_ioremap_resource(dev, res); + if (IS_ERR(io_base)) { + ret = PTR_ERR(io_base); + dev_err(dev, "failed to remap register memory: %d\n", ret); + return ret; + } + + dd->phy_base = res->start; + + dd->regmap = devm_regmap_init_mmio(dev, io_base, + &atmel_classd_regmap_config); + if (IS_ERR(dd->regmap)) { + ret = PTR_ERR(dd->regmap); + dev_err(dev, "failed to init register map: %d\n", ret); + return ret; + } + + ret = devm_snd_soc_register_component(dev, + &atmel_classd_cpu_dai_component, + &atmel_classd_cpu_dai, 1); + if (ret) { + dev_err(dev, "could not register CPU DAI: %d\n", ret); + return ret; + } + + ret = devm_snd_dmaengine_pcm_register(dev, + &atmel_classd_dmaengine_pcm_config, + 0); + if (ret) { + dev_err(dev, "could not register platform: %d\n", ret); + return ret; + } + + ret = snd_soc_register_codec(dev, &soc_codec_dev_classd, + &atmel_classd_codec_dai, 1); + if (ret) { + dev_err(dev, "could not register codec: %d\n", ret); + return ret; + } + + /* register sound card */ + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); + if (!card) + return -ENOMEM; + + snd_soc_card_set_drvdata(card, dd); + platform_set_drvdata(pdev, card); + + ret = atmel_classd_asoc_card_init(dev, card); + if (ret) { + dev_err(dev, "failed to init sound card\n"); + return ret; + } + + ret = devm_snd_soc_register_card(dev, card); + if (ret) { + dev_err(dev, "failed to register sound card: %d\n", ret); + return ret; + } + + return 0; +} + +static int atmel_classd_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + return 0; +} + +static struct platform_driver atmel_classd_driver = { + .driver = { + .name = "atmel-classd", + .of_match_table = of_match_ptr(atmel_classd_of_match), + .pm = &snd_soc_pm_ops, + }, + .probe = atmel_classd_probe, + .remove = atmel_classd_remove, +}; +module_platform_driver(atmel_classd_driver); + +MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture"); +MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>"); +MODULE_LICENSE("GPL"); |