Re: [PATCH v2 1/2] ASoC: codec: Inno codec driver for RK3036 SoC

[LABBE Corentin <clabbe.montjoie@gmail.com>]

On Thu, Nov 05, 2015 at 05:53:13PM +0800, Shunqian Zheng wrote:
> From: ZhengShunQian <zhengsq@rock-chips.com>
> 
> RK3036 SoC integrated with an Inno audio codec.
> This driver implements the functions of it.
> 
> There is not need a special machine driver, since the
> simple-card machine driver works perfect in this case.
> 
> Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>
> ---
>  sound/soc/codecs/Kconfig       |   4 +
>  sound/soc/codecs/Makefile      |   2 +
>  sound/soc/codecs/inno_rk3036.c | 455 +++++++++++++++++++++++++++++++++++++++++
>  sound/soc/codecs/inno_rk3036.h | 120 +++++++++++
>  4 files changed, 581 insertions(+)
>  create mode 100644 sound/soc/codecs/inno_rk3036.c
>  create mode 100644 sound/soc/codecs/inno_rk3036.h
> 
> diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
> index cfdafc4..89d789e 100644
> --- a/sound/soc/codecs/Kconfig
> +++ b/sound/soc/codecs/Kconfig
> @@ -67,6 +67,7 @@ config SND_SOC_ALL_CODECS
>  	select SND_SOC_ES8328_I2C if I2C
>  	select SND_SOC_GTM601
>  	select SND_SOC_ICS43432
> +	select SND_SOC_INNO_RK3036
>  	select SND_SOC_ISABELLE if I2C
>  	select SND_SOC_JZ4740_CODEC
>  	select SND_SOC_LM4857 if I2C
> @@ -471,6 +472,9 @@ config SND_SOC_GTM601
>  config SND_SOC_ICS43432
>  	tristate
>  
> +config SND_SOC_INNO_RK3036
> +	tristate "Inno codec driver for RK3036 SoC"
> +
>  config SND_SOC_ISABELLE
>          tristate
>  
> diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
> index f632fc4..2f6bc6c 100644
> --- a/sound/soc/codecs/Makefile
> +++ b/sound/soc/codecs/Makefile
> @@ -60,6 +60,7 @@ snd-soc-es8328-i2c-objs := es8328-i2c.o
>  snd-soc-es8328-spi-objs := es8328-spi.o
>  snd-soc-gtm601-objs := gtm601.o
>  snd-soc-ics43432-objs := ics43432.o
> +snd-soc-inno-rk3036-objs := inno_rk3036.o
>  snd-soc-isabelle-objs := isabelle.o
>  snd-soc-jz4740-codec-objs := jz4740.o
>  snd-soc-l3-objs := l3.o
> @@ -255,6 +256,7 @@ obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
>  obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
>  obj-$(CONFIG_SND_SOC_GTM601)    += snd-soc-gtm601.o
>  obj-$(CONFIG_SND_SOC_ICS43432)	+= snd-soc-ics43432.o
> +obj-$(CONFIG_SND_SOC_INNO_RK3036)	+= snd-soc-inno-rk3036.o
>  obj-$(CONFIG_SND_SOC_ISABELLE)	+= snd-soc-isabelle.o
>  obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o
>  obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o
> diff --git a/sound/soc/codecs/inno_rk3036.c b/sound/soc/codecs/inno_rk3036.c
> new file mode 100644
> index 0000000..ce68f02
> --- /dev/null
> +++ b/sound/soc/codecs/inno_rk3036.c
> @@ -0,0 +1,455 @@
> +/*
> + * Driver of Inno codec for rk3036 by Rockchip Inc.
> + *
> + * Author: Rockchip Inc.
> + * Author: Zheng ShunQian<zhengsq@rock-chips.com>
> + */
> +
> +#include <sound/soc.h>
> +#include <sound/tlv.h>
> +#include <sound/soc-dapm.h>
> +#include <sound/soc-dai.h>
> +#include <sound/pcm.h>
> +#include <sound/pcm_params.h>
> +
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/clk.h>
> +#include <linux/regmap.h>
> +#include <linux/device.h>
> +#include <linux/delay.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/io.h>
> +
> +#include "inno_rk3036.h"
> +
> +struct rk3036_codec_priv {
> +	void __iomem *base;
> +	struct clk *pclk;
> +	struct regmap *regmap;
> +	struct device *dev;
> +};
> +
> +static const DECLARE_TLV_DB_MINMAX(rk3036_codec_hp_tlv, -39, 0);
> +
> +static const char *rk3036_codec_antipop_text[] = {"none", "work"};
> +static const unsigned int rk3036_codec_antipop_values[] = {0x1, 0x2};
> +
> +static SOC_VALUE_ENUM_DOUBLE_DECL(rk3036_codec_antipop_enum, INNO_R09,
> +		INNO_R09_HPL_ANITPOP_SHIFT, INNO_R09_HPR_ANITPOP_SHIFT, 0x3,
> +		rk3036_codec_antipop_text, rk3036_codec_antipop_values);
> +
> +static const struct snd_kcontrol_new rk3036_codec_dapm_controls[] = {
> +	SOC_DOUBLE_R_RANGE_TLV("Headphone Volume", INNO_R07, INNO_R08,
> +		INNO_HP_GAIN_SHIFT, INNO_HP_GAIN_N39DB,
> +		INNO_HP_GAIN_0DB, 0, rk3036_codec_hp_tlv),
> +	SOC_DOUBLE("Zero Cross Detect", INNO_R06, INNO_R06_VOUTL_CZ_SHIFT,
> +		INNO_R06_VOUTR_CZ_SHIFT, 1, 0),
> +	SOC_DOUBLE("HP Mute", INNO_R09, INNO_R09_HPL_MUTE_SHIFT,
> +		INNO_R09_HPR_MUTE_SHIFT, 1, 1),
> +	SOC_ENUM("Anti-pop", rk3036_codec_antipop_enum),
> +};
> +
> +static const struct snd_kcontrol_new rk3036_codec_hpl_mixer_controls[] = {
> +	SOC_DAPM_SINGLE("DAC Left Out Switch", INNO_R09,
> +			INNO_R09_DACL_SWITCH_SHIFT, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new rk3036_codec_hpr_mixer_controls[] = {
> +	SOC_DAPM_SINGLE("DAC Right Out Switch", INNO_R09,
> +			INNO_R09_DACR_SWITCH_SHIFT, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new rk3036_codec_hpl_switch_controls[] = {
> +	SOC_DAPM_SINGLE("HP Left Out Switch", INNO_R05,
> +			INNO_R05_HPL_WORK_SHIFT, 1, 0),
> +};
> +
> +static const struct snd_kcontrol_new rk3036_codec_hpr_switch_controls[] = {
> +	SOC_DAPM_SINGLE("HP Right Out Switch", INNO_R05,
> +			INNO_R05_HPR_WORK_SHIFT, 1, 0),
> +};
> +
> +static const struct snd_soc_dapm_widget rk3036_codec_dapm_widgets[] = {
> +	SND_SOC_DAPM_SUPPLY_S("DAC PWR", 1, INNO_R06,
> +			      INNO_R06_DAC_EN_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACL VREF", 2, INNO_R04,
> +			      INNO_R04_DACL_VREF_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACR VREF", 2, INNO_R04,
> +			      INNO_R04_DACR_VREF_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACL HiLo VREF", 3, INNO_R06,
> +			      INNO_R06_DACL_HILO_VREF_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACR HiLo VREF", 3, INNO_R06,
> +			      INNO_R06_DACR_HILO_VREF_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACR CLK", 3, INNO_R04,
> +			      INNO_R04_DACR_CLK_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_SUPPLY_S("DACL CLK", 3, INNO_R04,
> +			      INNO_R04_DACL_CLK_SHIFT, 0, NULL, 0),
> +
> +	SND_SOC_DAPM_DAC("DACL", "Left Playback", INNO_R04,
> +			 INNO_R04_DACL_SW_SHIFT, 0),
> +	SND_SOC_DAPM_DAC("DACR", "Right Playback", INNO_R04,
> +			 INNO_R04_DACR_SW_SHIFT, 0),
> +
> +	SND_SOC_DAPM_MIXER("Left Headphone Mixer", SND_SOC_NOPM, 0, 0,
> +		rk3036_codec_hpl_mixer_controls,
> +		ARRAY_SIZE(rk3036_codec_hpl_mixer_controls)),
> +	SND_SOC_DAPM_MIXER("Right Headphone Mixer", SND_SOC_NOPM, 0, 0,
> +		rk3036_codec_hpr_mixer_controls,
> +		ARRAY_SIZE(rk3036_codec_hpr_mixer_controls)),
> +
> +	SND_SOC_DAPM_PGA("HP Left Out", INNO_R05,
> +			 INNO_R05_HPL_EN_SHIFT, 0, NULL, 0),
> +	SND_SOC_DAPM_PGA("HP Right Out", INNO_R05,
> +			 INNO_R05_HPR_EN_SHIFT, 0, NULL, 0),
> +
> +	SND_SOC_DAPM_MIXER("HP Left Switch",  SND_SOC_NOPM, 0, 0,
> +			   rk3036_codec_hpl_switch_controls,
> +			   ARRAY_SIZE(rk3036_codec_hpl_switch_controls)),
> +	SND_SOC_DAPM_MIXER("HP Right Switch",  SND_SOC_NOPM, 0, 0,
> +			   rk3036_codec_hpr_switch_controls,
> +			   ARRAY_SIZE(rk3036_codec_hpr_switch_controls)),
> +
> +	SND_SOC_DAPM_OUTPUT("HPL"),
> +	SND_SOC_DAPM_OUTPUT("HPR"),
> +};
> +
> +static const struct snd_soc_dapm_route rk3036_codec_dapm_routes[] = {
> +	{"DACL VREF", NULL, "DAC PWR"},
> +	{"DACR VREF", NULL, "DAC PWR"},
> +	{"DACL HiLo VREF", NULL, "DAC PWR"},
> +	{"DACR HiLo VREF", NULL, "DAC PWR"},
> +	{"DACL CLK", NULL, "DAC PWR"},
> +	{"DACR CLK", NULL, "DAC PWR"},
> +
> +	{"DACL", NULL, "DACL VREF"},
> +	{"DACL", NULL, "DACL HiLo VREF"},
> +	{"DACL", NULL, "DACL CLK"},
> +	{"DACR", NULL, "DACR VREF"},
> +	{"DACR", NULL, "DACR HiLo VREF"},
> +	{"DACR", NULL, "DACR CLK"},
> +
> +	{"Left Headphone Mixer", "DAC Left Out Switch", "DACL"},
> +	{"Right Headphone Mixer", "DAC Right Out Switch", "DACR"},
> +	{"HP Left Out", NULL, "Left Headphone Mixer"},
> +	{"HP Right Out", NULL, "Right Headphone Mixer"},
> +
> +	{"HP Left Switch", "HP Left Out Switch", "HP Left Out"},
> +	{"HP Right Switch", "HP Right Out Switch", "HP Right Out"},
> +
> +	{"HPL", NULL, "HP Left Switch"},
> +	{"HPR", NULL, "HP Right Switch"},
> +};
> +
> +static int rk3036_codec_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
> +{
> +	struct snd_soc_codec *codec = dai->codec;
> +	unsigned int reg01_val = 0,  reg02_val = 0, reg03_val = 0;
> +
> +	dev_dbg(codec->dev, "rk3036_codec dai set fmt : %08x\n", fmt);
> +
> +	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
> +	case SND_SOC_DAIFMT_CBS_CFS:
> +		reg01_val |= INNO_R01_PINDIR_IN_SLAVE |
> +			     INNO_R01_I2SMODE_SLAVE;
> +		break;
> +	case SND_SOC_DAIFMT_CBM_CFM:
> +		reg01_val |= INNO_R01_PINDIR_OUT_MASTER |
> +			     INNO_R01_I2SMODE_MASTER;
> +		break;
> +	default:
> +		dev_err(codec->dev, "invalid fmt\n");
> +		return -EINVAL;
> +	}
> +
> +	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
> +	case SND_SOC_DAIFMT_DSP_A:
> +		reg02_val |= INNO_R02_DACM_PCM;
> +		break;
> +	case SND_SOC_DAIFMT_I2S:
> +		reg02_val |= INNO_R02_DACM_I2S;
> +		break;
> +	case SND_SOC_DAIFMT_RIGHT_J:
> +		reg02_val |= INNO_R02_DACM_RJM;
> +		break;
> +	case SND_SOC_DAIFMT_LEFT_J:
> +		reg02_val |= INNO_R02_DACM_LJM;
> +		break;
> +	default:
> +		dev_err(codec->dev, "set dai format failed\n");
> +		return -EINVAL;
> +	}
> +
> +	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
> +	case SND_SOC_DAIFMT_NB_NF:
> +		reg02_val |= INNO_R02_LRCP_NORMAL;
> +		reg03_val |= INNO_R03_BCP_NORMAL;
> +		break;
> +	case SND_SOC_DAIFMT_IB_IF:
> +		reg02_val |= INNO_R02_LRCP_REVERSAL;
> +		reg03_val |= INNO_R03_BCP_REVERSAL;
> +		break;
> +	case SND_SOC_DAIFMT_IB_NF:
> +		reg02_val |= INNO_R02_LRCP_REVERSAL;
> +		reg03_val |= INNO_R03_BCP_NORMAL;
> +		break;
> +	case SND_SOC_DAIFMT_NB_IF:
> +		reg02_val |= INNO_R02_LRCP_NORMAL;
> +		reg03_val |= INNO_R03_BCP_REVERSAL;
> +		break;
> +	default:
> +		dev_err(codec->dev, "set dai format failed\n");
> +		return -EINVAL;
> +	}
> +
> +	snd_soc_update_bits(codec, INNO_R01, INNO_R01_I2SMODE_MSK |
> +			    INNO_R01_PINDIR_MSK, reg01_val);
> +	snd_soc_update_bits(codec, INNO_R02, INNO_R02_LRCP_MSK |
> +			    INNO_R02_DACM_MSK, reg02_val);
> +	snd_soc_update_bits(codec, INNO_R03, INNO_R03_BCP_MSK, reg03_val);
> +
> +	return 0;
> +}
> +
> +static int rk3036_codec_dai_hw_params(struct snd_pcm_substream *substream,
> +				      struct snd_pcm_hw_params *hw_params,
> +				      struct snd_soc_dai *dai)
> +{
> +	struct snd_soc_codec *codec = dai->codec;
> +	unsigned int reg02_val = 0, reg03_val = 0;
> +
> +	switch (params_format(hw_params)) {
> +	case SNDRV_PCM_FORMAT_S16_LE:
> +		reg02_val |= INNO_R02_VWL_16BIT;
> +		break;
> +	case SNDRV_PCM_FORMAT_S20_3LE:
> +		reg02_val |= INNO_R02_VWL_20BIT;
> +		break;
> +	case SNDRV_PCM_FORMAT_S24_LE:
> +		reg02_val |= INNO_R02_VWL_24BIT;
> +		break;
> +	case SNDRV_PCM_FORMAT_S32_LE:
> +		reg02_val |= INNO_R02_VWL_32BIT;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	reg02_val |= INNO_R02_LRCP_NORMAL;
> +	reg03_val |= INNO_R03_FWL_32BIT | INNO_R03_DACR_WORK;
> +
> +	snd_soc_update_bits(codec, INNO_R02, INNO_R02_LRCP_MSK |
> +			    INNO_R02_VWL_MSK, reg02_val);
> +	snd_soc_update_bits(codec, INNO_R03, INNO_R03_DACR_MSK |
> +			    INNO_R03_FWL_MSK, reg03_val);
> +	return 0;
> +}
> +
> +#define RK3036_CODEC_RATES (SNDRV_PCM_RATE_8000  | \
> +			    SNDRV_PCM_RATE_16000 | \
> +			    SNDRV_PCM_RATE_32000 | \
> +			    SNDRV_PCM_RATE_44100 | \
> +			    SNDRV_PCM_RATE_48000 | \
> +			    SNDRV_PCM_RATE_96000)
> +
> +#define RK3036_CODEC_FMTS (SNDRV_PCM_FMTBIT_S16_LE  | \
> +			   SNDRV_PCM_FMTBIT_S20_3LE | \
> +			   SNDRV_PCM_FMTBIT_S24_LE  | \
> +			   SNDRV_PCM_FMTBIT_S32_LE)
> +
> +struct snd_soc_dai_ops rk3036_codec_dai_ops = {
> +	.set_fmt	= rk3036_codec_dai_set_fmt,
> +	.hw_params	= rk3036_codec_dai_hw_params,
> +};
> +
> +struct snd_soc_dai_driver rk3036_codec_dai_driver[] = {
> +	{
> +		.name = "rk3036-codec-dai",
> +		.playback = {
> +			.stream_name = "Playback",
> +			.channels_min = 1,
> +			.channels_max = 2,
> +			.rates = RK3036_CODEC_RATES,
> +			.formats = RK3036_CODEC_FMTS,
> +		},
> +		.ops = &rk3036_codec_dai_ops,
> +		.symmetric_rates = 1,
> +	},
> +};
You could set it as const, since snd_soc_register_codec() expect it.

> +
> +static void rk3036_codec_reset(struct snd_soc_codec *codec)
> +{
> +	snd_soc_write(codec, INNO_R00,
> +		      INNO_R00_CSR_RESET | INNO_R00_CDCR_RESET);
> +	mdelay(10);
> +	snd_soc_write(codec, INNO_R00,
> +		      INNO_R00_CSR_WORK | INNO_R00_CDCR_WORK);
> +	mdelay(10);
Why 10 ? Does it is a datasheet given value , or a try and test value ?

> +}
> +
> +static int rk3036_codec_add_widgets(struct snd_soc_codec *codec)
> +{
> +	struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
> +
> +	snd_soc_add_codec_controls(codec, rk3036_codec_dapm_controls,
> +		ARRAY_SIZE(rk3036_codec_dapm_controls));
> +
> +	snd_soc_dapm_new_controls(dapm, rk3036_codec_dapm_widgets,
> +		ARRAY_SIZE(rk3036_codec_dapm_widgets));
> +
> +	snd_soc_dapm_add_routes(dapm, rk3036_codec_dapm_routes,
> +		ARRAY_SIZE(rk3036_codec_dapm_routes));
> +
> +	return 0;
> +}
> +
> +static int rk3036_codec_probe(struct snd_soc_codec *codec)
> +{
> +	rk3036_codec_reset(codec);
> +
> +	rk3036_codec_add_widgets(codec);
> +
> +	return 0;
> +}
> +
> +static int rk3036_codec_remove(struct snd_soc_codec *codec)
> +{
> +	rk3036_codec_reset(codec);
> +	return 0;
> +}
> +
> +static int rk3036_codec_set_bias_level(struct snd_soc_codec *codec,
> +				       enum snd_soc_bias_level level)
> +{
> +	switch (level) {
> +	case SND_SOC_BIAS_STANDBY:
> +		/* set a big current for capacitor charging. */
> +		snd_soc_write(codec, INNO_R10, INNO_R10_MAX_CUR);
> +		/* start precharge */
> +		snd_soc_write(codec, INNO_R06, INNO_R06_DAC_PRECHARGE);
> +
> +		break;
> +
> +	case SND_SOC_BIAS_OFF:
> +		/* set a big current for capacitor discharging. */
> +		snd_soc_write(codec, INNO_R10, INNO_R10_MAX_CUR);
> +		/* start discharge. */
> +		snd_soc_write(codec, INNO_R06, INNO_R06_DAC_DISCHARGE);
> +
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct snd_soc_codec_driver rk3036_codec_driver = {
> +	.probe		= rk3036_codec_probe,
> +	.remove		= rk3036_codec_remove,
> +	.set_bias_level	= rk3036_codec_set_bias_level,
> +};
You could set it as const, since snd_soc_register_codec() expect it.

> +
> +static struct regmap_config rk3036_codec_regmap_config = {
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +};
You could set it as const, since devm_regmap_init_mmio() expect it.

> +
> +#define GRF_SOC_CON0		0x00140
> +#define GRF_ACODEC_SEL		(BIT(10) | BIT(16 + 10))
> +
> +static int rk3036_codec_platform_probe(struct platform_device *pdev)
> +{
> +	struct rk3036_codec_priv *priv;
> +	struct device_node *of_node = pdev->dev.of_node;
> +	struct resource *res;
> +	void __iomem *base;
> +	struct regmap *grf;
> +	int ret;
> +
> +	priv = devm_kzalloc(&pdev->dev, sizeof(struct rk3036_codec_priv),
> +			    GFP_KERNEL);
It is prefered to use sizeof(*priv)

Do you have run checkpatch.pl --strict ?

> +	if (!priv)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	base = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	priv->base = base;
> +	priv->regmap = devm_regmap_init_mmio(&pdev->dev, priv->base,
> +					     &rk3036_codec_regmap_config);
> +	if (IS_ERR(priv->regmap)) {
> +		dev_err(&pdev->dev, "init regmap failed\n");
> +		return PTR_ERR(priv->regmap);
> +	}
> +
> +	grf = syscon_regmap_lookup_by_phandle(of_node, "rockchip,grf");
> +	if (IS_ERR(grf)) {
> +		dev_err(&pdev->dev, "needs 'rockchip,grf' property\n");
> +		return PTR_ERR(grf);
> +	}
> +	ret = regmap_write(grf, GRF_SOC_CON0, GRF_ACODEC_SEL);
i> +	if (ret != 0) {

Use if (ret)

> +		dev_err(&pdev->dev, "Could not write to GRF: %d\n", ret);
> +		return ret;
> +	}
> +
> +	priv->pclk = devm_clk_get(&pdev->dev, "acodec_pclk");
> +	if (IS_ERR(priv->pclk))
> +		return PTR_ERR(priv->pclk);
> +
> +	ret = clk_prepare_enable(priv->pclk);
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "failed to enable clk\n");
> +		return ret;
> +	}
> +
> +	priv->dev = &pdev->dev;
> +	dev_set_drvdata(&pdev->dev, priv);
> +
> +	ret = snd_soc_register_codec(&pdev->dev, &rk3036_codec_driver,
> +				     rk3036_codec_dai_driver,
> +				     ARRAY_SIZE(rk3036_codec_dai_driver));
> +	if (ret) {
> +		clk_disable_unprepare(priv->pclk);
> +		dev_set_drvdata(&pdev->dev, NULL);
> +	}
> +
> +	return ret;
> +}
> +
> +static int rk3036_codec_platform_remove(struct platform_device *pdev)
> +{
> +	struct rk3036_codec_priv *priv = dev_get_drvdata(&pdev->dev);
> +
> +	snd_soc_unregister_codec(&pdev->dev);
> +	clk_disable_unprepare(priv->pclk);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id rk3036_codec_of_match[] = {
> +	{ .compatible = "rockchip,rk3036-codec", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, rk3036_codec_of_match);
> +
> +static struct platform_driver rk3036_codec_platform_driver = {
> +	.driver = {
> +		.name = "rk3036-codec-platform",
> +		.owner = THIS_MODULE,
> +		.of_match_table = of_match_ptr(rk3036_codec_of_match),
> +	},
> +	.probe = rk3036_codec_platform_probe,
> +	.remove = rk3036_codec_platform_remove,
> +};
> +
> +module_platform_driver(rk3036_codec_platform_driver);
> +
> +MODULE_AUTHOR("Rockchip Inc.");
> +MODULE_DESCRIPTION("Rockchip rk3036 codec driver");
> +MODULE_LICENSE("GPL");
> diff --git a/sound/soc/codecs/inno_rk3036.h b/sound/soc/codecs/inno_rk3036.h
> new file mode 100644
> index 0000000..6c7dc53
> --- /dev/null
> +++ b/sound/soc/codecs/inno_rk3036.h
> @@ -0,0 +1,120 @@
> +/*
> + * Driver of Inno Codec for rk3036 by Rockchip Inc.
> + *
> + * Author: Zheng ShunQian<zhengsq@rock-chips.com>
> + */
> +
> +#ifndef _INNO_RK3036_CODEC_H
> +#define _INNO_RK3036_CODEC_H
> +
> +/* codec registers */
> +#define INNO_R00	0x00
> +#define INNO_R01	0x0c
> +#define INNO_R02	0x10
> +#define INNO_R03	0x14
> +#define INNO_R04	0x88
> +#define INNO_R05	0x8c
> +#define INNO_R06	0x90
> +#define INNO_R07	0x94
> +#define INNO_R08	0x98
> +#define INNO_R09	0x9c
> +#define INNO_R10	0xa0
> +
> +/* register bit filed */
> +#define INNO_R00_CSR_RESET		BIT(0) /*codec system reset*/
> +#define INNO_R00_CSR_WORK		BIT(0)
> +#define INNO_R00_CDCR_RESET		BIT(1) /*codec digital core reset*/
> +#define INNO_R00_CDCR_WORK		BIT(1)
> +#define INNO_R00_PRB_DISABLE		BIT(6) /*power reset bypass*/
> +#define INNO_R00_PRB_ENABLE		BIT(6)
> +
> +#define INNO_R01_I2SMODE_MSK		BIT(4)
> +#define INNO_R01_I2SMODE_SLAVE		BIT(4)
> +#define INNO_R01_I2SMODE_MASTER		BIT(4)
> +#define INNO_R01_PINDIR_MSK		BIT(5)
> +#define INNO_R01_PINDIR_IN_SLAVE	BIT(5) /*direction of pin*/
> +#define INNO_R01_PINDIR_OUT_MASTER	BIT(5)
> +
> +#define INNO_R02_LRS_MSK		BIT(2)
> +#define INNO_R02_LRS_NORMAL		BIT(2) /*DAC Left Right Swap*/
> +#define INNO_R02_LRS_SWAP		BIT(2)
> +#define INNO_R02_DACM_MSK		BIT(3)
> +#define INNO_R02_DACM_PCM		BIT(3) /*DAC Mode*/
> +#define INNO_R02_DACM_I2S		BIT(3)
> +#define INNO_R02_DACM_LJM		BIT(3)
> +#define INNO_R02_DACM_RJM		BIT(3)
> +#define INNO_R02_VWL_MSK		BIT(5)
> +#define INNO_R02_VWL_32BIT		BIT(5) /*1/2Frame Valid Word Length*/
> +#define INNO_R02_VWL_24BIT		BIT(5)
> +#define INNO_R02_VWL_20BIT		BIT(5)
> +#define INNO_R02_VWL_16BIT		BIT(5)
> +#define INNO_R02_LRCP_MSK		BIT(7)
> +#define INNO_R02_LRCP_NORMAL		BIT(7) /*Left Right Polarity*/
> +#define INNO_R02_LRCP_REVERSAL		BIT(7)
> +
> +#define INNO_R03_BCP_MSK		BIT(0)
> +#define INNO_R03_BCP_NORMAL		BIT(0) /*DAC bit clock polarity*/
> +#define INNO_R03_BCP_REVERSAL		BIT(0)
> +#define INNO_R03_DACR_MSK		BIT(1)
> +#define INNO_R03_DACR_RESET		BIT(1) /*DAC Reset*/
> +#define INNO_R03_DACR_WORK		BIT(1)
> +#define INNO_R03_FWL_MSK		BIT(2)
> +#define INNO_R03_FWL_32BIT		BIT(2) /*1/2Frame Word Length*/
> +#define INNO_R03_FWL_24BIT		BIT(2)
> +#define INNO_R03_FWL_20BIT		BIT(2)
> +#define INNO_R03_FWL_16BIT		BIT(2)
> +
> +#define INNO_R04_DACR_SW_SHIFT		0
> +#define INNO_R04_DACL_SW_SHIFT		1
> +#define INNO_R04_DACR_CLK_SHIFT		2
> +#define INNO_R04_DACL_CLK_SHIFT		3
> +#define INNO_R04_DACR_VREF_SHIFT	4
> +#define INNO_R04_DACL_VREF_SHIFT	5
> +
> +#define INNO_R05_HPR_EN_SHIFT		0
> +#define INNO_R05_HPL_EN_SHIFT		1
> +#define INNO_R05_HPR_WORK_SHIFT		2
> +#define INNO_R05_HPL_WORK_SHIFT		3
> +
> +#define INNO_R06_VOUTR_CZ_SHIFT		0
> +#define INNO_R06_VOUTL_CZ_SHIFT		1
> +#define INNO_R06_DACR_HILO_VREF_SHIFT	2
> +#define INNO_R06_DACL_HILO_VREF_SHIFT	3
> +#define INNO_R06_DAC_EN_SHIFT		5
> +
> +#define INNO_R06_DAC_PRECHARGE		BIT(4) /*PreCharge control for DAC*/
> +#define INNO_R06_DAC_DISCHARGE		BIT(4)
> +
> +#define INNO_HP_GAIN_SHIFT		0
> +/* Gain of output, 1.5db step: -39db(0x0) ~ 0db(0x1a) ~ 6db(0x1f) */
> +#define INNO_HP_GAIN_0DB		0x1a
> +#define INNO_HP_GAIN_N39DB		0x0
> +
> +#define INNO_R09_HPR_ANITPOP_SHIFT	0
> +#define INNO_R09_HPL_ANITPOP_SHIFT	2
> +#define INNO_R09_HPR_MUTE_SHIFT		4
> +#define INNO_R09_HPL_MUTE_SHIFT		5
> +#define INNO_R09_DACR_SWITCH_SHIFT	6
> +#define INNO_R09_DACL_SWITCH_SHIFT	7
> +
> +#define INNO_R10_CHARGE_SEL_CUR_400I_YES	BIT(0)
> +#define INNO_R10_CHARGE_SEL_CUR_400I_NO		BIT(0)
> +#define INNO_R10_CHARGE_SEL_CUR_260I_YES	BIT(1)
> +#define INNO_R10_CHARGE_SEL_CUR_260I_NO		BIT(1)
> +#define INNO_R10_CHARGE_SEL_CUR_130I_YES	BIT(2)
> +#define INNO_R10_CHARGE_SEL_CUR_130I_NO		BIT(2)
> +#define INNO_R10_CHARGE_SEL_CUR_100I_YES	BIT(3)
> +#define INNO_R10_CHARGE_SEL_CUR_100I_NO		BIT(3)
> +#define INNO_R10_CHARGE_SEL_CUR_050I_YES	BIT(4)
> +#define INNO_R10_CHARGE_SEL_CUR_050I_NO		BIT(4)
> +#define INNO_R10_CHARGE_SEL_CUR_027I_YES	BIT(5)
> +#define INNO_R10_CHARGE_SEL_CUR_027I_NO		BIT(5)
> +
> +#define INNO_R10_MAX_CUR (INNO_R10_CHARGE_SEL_CUR_400I_YES | \
> +			  INNO_R10_CHARGE_SEL_CUR_260I_YES | \
> +			  INNO_R10_CHARGE_SEL_CUR_130I_YES | \
> +			  INNO_R10_CHARGE_SEL_CUR_100I_YES | \
> +			  INNO_R10_CHARGE_SEL_CUR_050I_YES | \
> +			  INNO_R10_CHARGE_SEL_CUR_027I_YES)
> +
> +#endif
> -- 
> 1.9.1
> 
> --
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Regards

LABBE Corentin