sound/soc/codecs/fsl_mqs.c - linux-imx - Git at Google

 /*
  * ALSA SoC IMX MQS driver
  *
  * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
  *
  * 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.
  */

 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
 #include <sound/soc.h>
 #include <sound/pcm.h>
 #include <sound/initval.h>


 #define REG_MQS_CTRL		0x00

 #define MQS_EN_MASK			(0x1 << 28)
 #define MQS_EN_SHIFT			(28)
 #define MQS_SW_RST_MASK			(0x1 << 24)
 #define MQS_SW_RST_SHIFT		(24)
 #define MQS_OVERSAMPLE_MASK		(0x1 << 20)
 #define MQS_OVERSAMPLE_SHIFT		(20)
 #define MQS_CLK_DIV_MASK		(0xFF << 0)
 #define MQS_CLK_DIV_SHIFT		(0)


 /* codec private data */
 struct fsl_mqs {
 	struct platform_device *pdev;
 	struct regmap *gpr;
 	unsigned int reg_iomuxc_gpr2;

 	struct regmap *regmap;
 	unsigned int reg_mqs_ctrl;

 	struct clk *mclk;
 	struct clk *ipg;

 	unsigned long mclk_rate;

 	int sysclk_rate;
 	int bclk;
 	int lrclk;
 	bool use_gpr;
 	char name[32];
 };

 #define FSL_MQS_RATES	SNDRV_PCM_RATE_8000_192000
 #define FSL_MQS_FORMATS	SNDRV_PCM_FMTBIT_S16_LE

 static int fsl_mqs_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);
 	int div, res;

 	mqs_priv->mclk_rate = clk_get_rate(mqs_priv->mclk);

 	mqs_priv->bclk = snd_soc_params_to_bclk(params);
 	mqs_priv->lrclk = params_rate(params);

 	/*
 	 * mclk_rate / (oversample(32,64) * FS * 2 * divider ) = repeat_rate;
 	 * if repeat_rate is 8, mqs can achieve better quality.
 	 * oversample rate is fix to 32 currently.
 	 */
 	div = mqs_priv->mclk_rate / (32 * 2 * mqs_priv->lrclk * 8);
 	res = mqs_priv->mclk_rate % (32 * 2 * mqs_priv->lrclk * 8);

 	if (res == 0 && div > 0 && div <= 256) {
 		if (mqs_priv->use_gpr) {
 			regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
 				IMX6SX_GPR2_MQS_CLK_DIV_MASK,
 				(div-1) << IMX6SX_GPR2_MQS_CLK_DIV_SHIFT);
 			regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
 				IMX6SX_GPR2_MQS_OVERSAMPLE_MASK,
 				0 << IMX6SX_GPR2_MQS_OVERSAMPLE_SHIFT);
 		} else {
 			regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
 						MQS_CLK_DIV_MASK,
 						(div-1) << MQS_CLK_DIV_SHIFT);
 			regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
 						MQS_OVERSAMPLE_MASK,
 						0 << MQS_OVERSAMPLE_SHIFT);
 		}
 	} else
 		dev_err(&mqs_priv->pdev->dev, "can't get proper divider\n");

 	return 0;
 }

 static int fsl_mqs_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 {
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_LEFT_J:
 		break;
 	default:
 		return -EINVAL;
 	}

 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 	case SND_SOC_DAIFMT_NB_NF:
 		break;
 	default:
 		return -EINVAL;
 	}

 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBS_CFS:
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static int fsl_mqs_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
 				 unsigned int freq, int dir)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

 	mqs_priv->sysclk_rate = freq;

 	return 0;
 }

 static int fsl_mqs_startup(struct snd_pcm_substream *substream,
 			    struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

 	if (mqs_priv->use_gpr)
 		regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2, IMX6SX_GPR2_MQS_EN_MASK,
 					1 << IMX6SX_GPR2_MQS_EN_SHIFT);
 	else
 		regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
 					MQS_EN_MASK,
 					1 << MQS_EN_SHIFT);
 	return 0;
 }

 static void fsl_mqs_shutdown(struct snd_pcm_substream *substream,
 			    struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

 	if (mqs_priv->use_gpr)
 		regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
 					IMX6SX_GPR2_MQS_EN_MASK, 0);
 	else
 		regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
 					MQS_EN_MASK, 0);
 }


 static struct snd_soc_codec_driver soc_codec_fsl_mqs = {
 	.idle_bias_off = true,
 };

 static const struct snd_soc_dai_ops fsl_mqs_dai_ops = {
 	.startup = fsl_mqs_startup,
 	.shutdown = fsl_mqs_shutdown,
 	.hw_params = fsl_mqs_hw_params,
 	.set_fmt = fsl_mqs_set_dai_fmt,
 	.set_sysclk = fsl_mqs_set_dai_sysclk,
 };

 static struct snd_soc_dai_driver fsl_mqs_dai = {
 	.name		= "fsl-mqs-dai",
 	.playback	= {
 		.stream_name	= "Playback",
 		.channels_min	= 2,
 		.channels_max	= 2,
 		.rates		= FSL_MQS_RATES,
 		.formats	= FSL_MQS_FORMATS,
 	},
 	.ops = &fsl_mqs_dai_ops,
 };

 static const struct regmap_config fsl_mqs_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
 	.max_register = REG_MQS_CTRL,
 	.cache_type = REGCACHE_NONE,
 };

 static int fsl_mqs_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *gpr_np = 0;
 	struct fsl_mqs *mqs_priv;
 	struct resource *res;
 	void __iomem *regs;
 	int ret = 0;

 	mqs_priv = devm_kzalloc(&pdev->dev, sizeof(*mqs_priv), GFP_KERNEL);
 	if (!mqs_priv)
 		return -ENOMEM;

 	mqs_priv->pdev = pdev;
 	strncpy(mqs_priv->name, np->name, sizeof(mqs_priv->name) - 1);

 	if (of_device_is_compatible(np, "fsl,imx8qm-mqs"))
 		mqs_priv->use_gpr = false;
 	else
 		mqs_priv->use_gpr = true;

 	if (mqs_priv->use_gpr) {
 		gpr_np = of_parse_phandle(np, "gpr", 0);
 		if (IS_ERR(gpr_np)) {
 			dev_err(&pdev->dev, "failed to get gpr node by phandle\n");
 			ret = PTR_ERR(gpr_np);
 			goto out;
 		}

 		mqs_priv->gpr = syscon_node_to_regmap(gpr_np);
 		if (IS_ERR(mqs_priv->gpr)) {
 			dev_err(&pdev->dev, "failed to get gpr regmap\n");
 			ret = PTR_ERR(mqs_priv->gpr);
 			goto out;
 		}
 	} else {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 		regs = devm_ioremap_resource(&pdev->dev, res);
 		if (IS_ERR(regs))
 			return PTR_ERR(regs);

 		mqs_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
 				"core", regs, &fsl_mqs_regmap_config);
 		if (IS_ERR(mqs_priv->regmap)) {
 			dev_err(&pdev->dev, "failed to init regmap: %ld\n",
 					PTR_ERR(mqs_priv->regmap));
 			return PTR_ERR(mqs_priv->regmap);
 		}

 		mqs_priv->ipg = devm_clk_get(&pdev->dev, "core");
 		if (IS_ERR(mqs_priv->ipg)) {
 			dev_err(&pdev->dev, "failed to get the clock: %ld\n",
 					PTR_ERR(mqs_priv->ipg));
 			goto out;
 		}
 	}

 	mqs_priv->mclk = devm_clk_get(&pdev->dev, "mclk");
 	if (IS_ERR(mqs_priv->mclk)) {
 		dev_err(&pdev->dev, "failed to get the clock: %ld\n",
 				PTR_ERR(mqs_priv->mclk));
 		goto out;
 	}

 	dev_set_drvdata(&pdev->dev, mqs_priv);
 	pm_runtime_enable(&pdev->dev);

 	return snd_soc_register_codec(&pdev->dev, &soc_codec_fsl_mqs,
 			&fsl_mqs_dai, 1);

 out:
 	if (!IS_ERR(gpr_np))
 		of_node_put(gpr_np);

 	return ret;
 }

 static int fsl_mqs_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }

 #ifdef CONFIG_PM
 static int fsl_mqs_runtime_resume(struct device *dev)
 {
 	struct fsl_mqs *mqs_priv = dev_get_drvdata(dev);

 	if (mqs_priv->ipg)
 		clk_prepare_enable(mqs_priv->ipg);

 	if (mqs_priv->mclk)
 		clk_prepare_enable(mqs_priv->mclk);

 	if (mqs_priv->use_gpr)
 		regmap_write(mqs_priv->gpr, IOMUXC_GPR2,
 			    mqs_priv->reg_iomuxc_gpr2);
 	else
 		regmap_write(mqs_priv->regmap, REG_MQS_CTRL,
 			     mqs_priv->reg_mqs_ctrl);
 	return 0;
 }

 static int fsl_mqs_runtime_suspend(struct device *dev)
 {
 	struct fsl_mqs *mqs_priv = dev_get_drvdata(dev);

 	if (mqs_priv->use_gpr)
 		regmap_read(mqs_priv->gpr, IOMUXC_GPR2,
 			    &mqs_priv->reg_iomuxc_gpr2);
 	else
 		regmap_read(mqs_priv->regmap, REG_MQS_CTRL,
 			    &mqs_priv->reg_mqs_ctrl);

 	if (mqs_priv->mclk)
 		clk_disable_unprepare(mqs_priv->mclk);

 	if (mqs_priv->ipg)
 		clk_disable_unprepare(mqs_priv->ipg);

 	return 0;
 }
 #endif

 static const struct dev_pm_ops fsl_mqs_pm_ops = {
 	SET_RUNTIME_PM_OPS(fsl_mqs_runtime_suspend,
 			   fsl_mqs_runtime_resume,
 			   NULL)
 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 };

 static const struct of_device_id fsl_mqs_dt_ids[] = {
 	{ .compatible = "fsl,imx8qm-mqs", },
 	{ .compatible = "fsl,imx6sx-mqs", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, fsl_mqs_dt_ids);


 static struct platform_driver fsl_mqs_driver = {
 	.probe		= fsl_mqs_probe,
 	.remove		= fsl_mqs_remove,
 	.driver		= {
 		.name	= "fsl-mqs",
 		.of_match_table = fsl_mqs_dt_ids,
 		.pm = &fsl_mqs_pm_ops,
 	},
 };

 module_platform_driver(fsl_mqs_driver);

 MODULE_AUTHOR("shengjiu wang <shengjiu.wang@freescale.com>");
 MODULE_DESCRIPTION("MQS dummy codec driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform: fsl-mqs");
	/*
	* ALSA SoC IMX MQS driver
	*
	* Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
	*
	* 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.
	*/

	#include <linux/clk.h>
	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/mfd/syscon.h>
	#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
	#include <linux/pm_runtime.h>
	#include <linux/of.h>
	#include <linux/pm.h>
	#include <linux/slab.h>
	#include <sound/soc.h>
	#include <sound/pcm.h>
	#include <sound/initval.h>


	#define REG_MQS_CTRL 0x00

	#define MQS_EN_MASK (0x1 << 28)
	#define MQS_EN_SHIFT (28)
	#define MQS_SW_RST_MASK (0x1 << 24)
	#define MQS_SW_RST_SHIFT (24)
	#define MQS_OVERSAMPLE_MASK (0x1 << 20)
	#define MQS_OVERSAMPLE_SHIFT (20)
	#define MQS_CLK_DIV_MASK (0xFF << 0)
	#define MQS_CLK_DIV_SHIFT (0)


	/* codec private data */
	struct fsl_mqs {
	struct platform_device *pdev;
	struct regmap *gpr;
	unsigned int reg_iomuxc_gpr2;

	struct regmap *regmap;
	unsigned int reg_mqs_ctrl;

	struct clk *mclk;
	struct clk *ipg;

	unsigned long mclk_rate;

	int sysclk_rate;
	int bclk;
	int lrclk;
	bool use_gpr;
	char name[32];
	};

	#define FSL_MQS_RATES SNDRV_PCM_RATE_8000_192000
	#define FSL_MQS_FORMATS SNDRV_PCM_FMTBIT_S16_LE

	static int fsl_mqs_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);
	int div, res;

	mqs_priv->mclk_rate = clk_get_rate(mqs_priv->mclk);

	mqs_priv->bclk = snd_soc_params_to_bclk(params);
	mqs_priv->lrclk = params_rate(params);

	/*
	* mclk_rate / (oversample(32,64) * FS * 2 * divider ) = repeat_rate;
	* if repeat_rate is 8, mqs can achieve better quality.
	* oversample rate is fix to 32 currently.
	*/
	div = mqs_priv->mclk_rate / (32 * 2 * mqs_priv->lrclk * 8);
	res = mqs_priv->mclk_rate % (32 * 2 * mqs_priv->lrclk * 8);

	if (res == 0 && div > 0 && div <= 256) {
	if (mqs_priv->use_gpr) {
	regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
	IMX6SX_GPR2_MQS_CLK_DIV_MASK,
	(div-1) << IMX6SX_GPR2_MQS_CLK_DIV_SHIFT);
	regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
	IMX6SX_GPR2_MQS_OVERSAMPLE_MASK,
	0 << IMX6SX_GPR2_MQS_OVERSAMPLE_SHIFT);
	} else {
	regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
	MQS_CLK_DIV_MASK,
	(div-1) << MQS_CLK_DIV_SHIFT);
	regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
	MQS_OVERSAMPLE_MASK,
	0 << MQS_OVERSAMPLE_SHIFT);
	}
	} else
	dev_err(&mqs_priv->pdev->dev, "can't get proper divider\n");

	return 0;
	}

	static int fsl_mqs_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	{
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_LEFT_J:
	break;
	default:
	return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
	break;
	default:
	return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static int fsl_mqs_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
	unsigned int freq, int dir)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

	mqs_priv->sysclk_rate = freq;

	return 0;
	}

	static int fsl_mqs_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

	if (mqs_priv->use_gpr)
	regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2, IMX6SX_GPR2_MQS_EN_MASK,
	1 << IMX6SX_GPR2_MQS_EN_SHIFT);
	else
	regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
	MQS_EN_MASK,
	1 << MQS_EN_SHIFT);
	return 0;
	}

	static void fsl_mqs_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct fsl_mqs *mqs_priv = snd_soc_codec_get_drvdata(codec);

	if (mqs_priv->use_gpr)
	regmap_update_bits(mqs_priv->gpr, IOMUXC_GPR2,
	IMX6SX_GPR2_MQS_EN_MASK, 0);
	else
	regmap_update_bits(mqs_priv->regmap, REG_MQS_CTRL,
	MQS_EN_MASK, 0);
	}


	static struct snd_soc_codec_driver soc_codec_fsl_mqs = {
	.idle_bias_off = true,
	};

	static const struct snd_soc_dai_ops fsl_mqs_dai_ops = {
	.startup = fsl_mqs_startup,
	.shutdown = fsl_mqs_shutdown,
	.hw_params = fsl_mqs_hw_params,
	.set_fmt = fsl_mqs_set_dai_fmt,
	.set_sysclk = fsl_mqs_set_dai_sysclk,
	};

	static struct snd_soc_dai_driver fsl_mqs_dai = {
	.name = "fsl-mqs-dai",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = FSL_MQS_RATES,
	.formats = FSL_MQS_FORMATS,
	},
	.ops = &fsl_mqs_dai_ops,
	};

	static const struct regmap_config fsl_mqs_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = REG_MQS_CTRL,
	.cache_type = REGCACHE_NONE,
	};

	static int fsl_mqs_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *gpr_np = 0;
	struct fsl_mqs *mqs_priv;
	struct resource *res;
	void __iomem *regs;
	int ret = 0;

	mqs_priv = devm_kzalloc(&pdev->dev, sizeof(*mqs_priv), GFP_KERNEL);
	if (!mqs_priv)
	return -ENOMEM;

	mqs_priv->pdev = pdev;
	strncpy(mqs_priv->name, np->name, sizeof(mqs_priv->name) - 1);

	if (of_device_is_compatible(np, "fsl,imx8qm-mqs"))
	mqs_priv->use_gpr = false;
	else
	mqs_priv->use_gpr = true;

	if (mqs_priv->use_gpr) {
	gpr_np = of_parse_phandle(np, "gpr", 0);
	if (IS_ERR(gpr_np)) {
	dev_err(&pdev->dev, "failed to get gpr node by phandle\n");
	ret = PTR_ERR(gpr_np);
	goto out;
	}

	mqs_priv->gpr = syscon_node_to_regmap(gpr_np);
	if (IS_ERR(mqs_priv->gpr)) {
	dev_err(&pdev->dev, "failed to get gpr regmap\n");
	ret = PTR_ERR(mqs_priv->gpr);
	goto out;
	}
	} else {
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(regs))
	return PTR_ERR(regs);

	mqs_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
	"core", regs, &fsl_mqs_regmap_config);
	if (IS_ERR(mqs_priv->regmap)) {
	dev_err(&pdev->dev, "failed to init regmap: %ld\n",
	PTR_ERR(mqs_priv->regmap));
	return PTR_ERR(mqs_priv->regmap);
	}

	mqs_priv->ipg = devm_clk_get(&pdev->dev, "core");
	if (IS_ERR(mqs_priv->ipg)) {
	dev_err(&pdev->dev, "failed to get the clock: %ld\n",
	PTR_ERR(mqs_priv->ipg));
	goto out;
	}
	}

	mqs_priv->mclk = devm_clk_get(&pdev->dev, "mclk");
	if (IS_ERR(mqs_priv->mclk)) {
	dev_err(&pdev->dev, "failed to get the clock: %ld\n",
	PTR_ERR(mqs_priv->mclk));
	goto out;
	}

	dev_set_drvdata(&pdev->dev, mqs_priv);
	pm_runtime_enable(&pdev->dev);

	return snd_soc_register_codec(&pdev->dev, &soc_codec_fsl_mqs,
	&fsl_mqs_dai, 1);

	out:
	if (!IS_ERR(gpr_np))
	of_node_put(gpr_np);

	return ret;
	}

	static int fsl_mqs_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_codec(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	return 0;
	}

	#ifdef CONFIG_PM
	static int fsl_mqs_runtime_resume(struct device *dev)
	{
	struct fsl_mqs *mqs_priv = dev_get_drvdata(dev);

	if (mqs_priv->ipg)
	clk_prepare_enable(mqs_priv->ipg);

	if (mqs_priv->mclk)
	clk_prepare_enable(mqs_priv->mclk);

	if (mqs_priv->use_gpr)
	regmap_write(mqs_priv->gpr, IOMUXC_GPR2,
	mqs_priv->reg_iomuxc_gpr2);
	else
	regmap_write(mqs_priv->regmap, REG_MQS_CTRL,
	mqs_priv->reg_mqs_ctrl);
	return 0;
	}

	static int fsl_mqs_runtime_suspend(struct device *dev)
	{
	struct fsl_mqs *mqs_priv = dev_get_drvdata(dev);

	if (mqs_priv->use_gpr)
	regmap_read(mqs_priv->gpr, IOMUXC_GPR2,
	&mqs_priv->reg_iomuxc_gpr2);
	else
	regmap_read(mqs_priv->regmap, REG_MQS_CTRL,
	&mqs_priv->reg_mqs_ctrl);

	if (mqs_priv->mclk)
	clk_disable_unprepare(mqs_priv->mclk);

	if (mqs_priv->ipg)
	clk_disable_unprepare(mqs_priv->ipg);

	return 0;
	}
	#endif

	static const struct dev_pm_ops fsl_mqs_pm_ops = {
	SET_RUNTIME_PM_OPS(fsl_mqs_runtime_suspend,
	fsl_mqs_runtime_resume,
	NULL)
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
	};

	static const struct of_device_id fsl_mqs_dt_ids[] = {
	{ .compatible = "fsl,imx8qm-mqs", },
	{ .compatible = "fsl,imx6sx-mqs", },
	{}
	};
	MODULE_DEVICE_TABLE(of, fsl_mqs_dt_ids);


	static struct platform_driver fsl_mqs_driver = {
	.probe = fsl_mqs_probe,
	.remove = fsl_mqs_remove,
	.driver = {
	.name = "fsl-mqs",
	.of_match_table = fsl_mqs_dt_ids,
	.pm = &fsl_mqs_pm_ops,
	},
	};

	module_platform_driver(fsl_mqs_driver);

	MODULE_AUTHOR("shengjiu wang <shengjiu.wang@freescale.com>");
	MODULE_DESCRIPTION("MQS dummy codec driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform: fsl-mqs");