sound/soc/spear/spdif_out.c - kernel/msm-4.9 - Gitiles

 /*
  * ALSA SoC SPDIF Out Audio Layer for spear processors
  *
  * Copyright (C) 2012 ST Microelectronics
  * Vipin Kumar <vipin.kumar@st.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */

 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <sound/dmaengine_pcm.h>
 #include <sound/soc.h>
 #include <sound/spear_dma.h>
 #include <sound/spear_spdif.h>
 #include "spdif_out_regs.h"
 #include "spear_pcm.h"

 struct spdif_out_params {
 	u32 rate;
 	u32 core_freq;
 	u32 mute;
 };

 struct spdif_out_dev {
 	struct clk *clk;
 	struct spear_dma_data dma_params;
 	struct spdif_out_params saved_params;
 	u32 running;
 	void __iomem *io_base;
 	struct snd_dmaengine_dai_dma_data dma_params_tx;
 	struct snd_dmaengine_pcm_config config;
 };

 static void spdif_out_configure(struct spdif_out_dev *host)
 {
 	writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
 	mdelay(1);
 	writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
 			host->io_base + SPDIF_OUT_SOFT_RST);

 	writel(SPDIF_OUT_FDMA_TRIG_16 | SPDIF_OUT_MEMFMT_16_16 |
 			SPDIF_OUT_VALID_HW | SPDIF_OUT_USER_HW |
 			SPDIF_OUT_CHNLSTA_HW | SPDIF_OUT_PARITY_HW,
 			host->io_base + SPDIF_OUT_CFG);

 	writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
 	writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
 }

 static int spdif_out_startup(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *cpu_dai)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
 	int ret;

 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
 		return -EINVAL;

 	ret = clk_enable(host->clk);
 	if (ret)
 		return ret;

 	host->running = true;
 	spdif_out_configure(host);

 	return 0;
 }

 static void spdif_out_shutdown(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *dai)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
 		return;

 	clk_disable(host->clk);
 	host->running = false;
 }

 static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
 		u32 rate)
 {
 	u32 divider, ctrl;

 	clk_set_rate(host->clk, core_freq);
 	divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));

 	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
 	ctrl &= ~SPDIF_DIVIDER_MASK;
 	ctrl |= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
 	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
 }

 static int spdif_out_hw_params(struct snd_pcm_substream *substream,
 		struct snd_pcm_hw_params *params,
 		struct snd_soc_dai *dai)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
 	u32 rate, core_freq;

 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
 		return -EINVAL;

 	rate = params_rate(params);

 	switch (rate) {
 	case 8000:
 	case 16000:
 	case 32000:
 	case 64000:
 		/*
 		 * The clock is multiplied by 10 to bring it to feasible range
 		 * of frequencies for sscg
 		 */
 		core_freq = 64000 * 128 * 10;	/* 81.92 MHz */
 		break;
 	case 5512:
 	case 11025:
 	case 22050:
 	case 44100:
 	case 88200:
 	case 176400:
 		core_freq = 176400 * 128;	/* 22.5792 MHz */
 		break;
 	case 48000:
 	case 96000:
 	case 192000:
 	default:
 		core_freq = 192000 * 128;	/* 24.576 MHz */
 		break;
 	}

 	spdif_out_clock(host, core_freq, rate);
 	host->saved_params.core_freq = core_freq;
 	host->saved_params.rate = rate;

 	return 0;
 }

 static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
 		struct snd_soc_dai *dai)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
 	u32 ctrl;
 	int ret = 0;

 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
 		return -EINVAL;

 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 			ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
 			ctrl &= ~SPDIF_OPMODE_MASK;
 			if (!host->saved_params.mute)
 				ctrl |= SPDIF_OPMODE_AUD_DATA |
 					SPDIF_STATE_NORMAL;
 			else
 				ctrl |= SPDIF_OPMODE_MUTE_PCM;
 			writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
 		break;

 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
 		ctrl &= ~SPDIF_OPMODE_MASK;
 		ctrl |= SPDIF_OPMODE_OFF;
 		writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
 		break;

 	default:
 		ret = -EINVAL;
 		break;
 	}
 	return ret;
 }

 static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
 	u32 val;

 	host->saved_params.mute = mute;
 	val = readl(host->io_base + SPDIF_OUT_CTRL);
 	val &= ~SPDIF_OPMODE_MASK;

 	if (mute)
 		val |= SPDIF_OPMODE_MUTE_PCM;
 	else {
 		if (host->running)
 			val |= SPDIF_OPMODE_AUD_DATA | SPDIF_STATE_NORMAL;
 		else
 			val |= SPDIF_OPMODE_OFF;
 	}

 	writel(val, host->io_base + SPDIF_OUT_CTRL);
 	return 0;
 }

 static int spdif_mute_get(struct snd_kcontrol *kcontrol,
 		struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

 	ucontrol->value.integer.value[0] = host->saved_params.mute;
 	return 0;
 }

 static int spdif_mute_put(struct snd_kcontrol *kcontrol,
 		struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

 	if (host->saved_params.mute == ucontrol->value.integer.value[0])
 		return 0;

 	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);

 	return 1;
 }
 static const struct snd_kcontrol_new spdif_out_controls[] = {
 	SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
 			spdif_mute_get, spdif_mute_put),
 };

 static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

 	host->dma_params_tx.filter_data = &host->dma_params;
 	dai->playback_dma_data = &host->dma_params_tx;

 	return snd_soc_add_dai_controls(dai, spdif_out_controls,
 				ARRAY_SIZE(spdif_out_controls));
 }

 static const struct snd_soc_dai_ops spdif_out_dai_ops = {
 	.digital_mute	= spdif_digital_mute,
 	.startup	= spdif_out_startup,
 	.shutdown	= spdif_out_shutdown,
 	.trigger	= spdif_out_trigger,
 	.hw_params	= spdif_out_hw_params,
 };

 static struct snd_soc_dai_driver spdif_out_dai = {
 	.playback = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
 				 SNDRV_PCM_RATE_192000),
 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.probe = spdif_soc_dai_probe,
 	.ops = &spdif_out_dai_ops,
 };

 static const struct snd_soc_component_driver spdif_out_component = {
 	.name		= "spdif-out",
 };

 static int spdif_out_probe(struct platform_device *pdev)
 {
 	struct spdif_out_dev *host;
 	struct spear_spdif_platform_data *pdata;
 	struct resource *res;
 	int ret;

 	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 	if (!host) {
 		dev_warn(&pdev->dev, "kzalloc fail\n");
 		return -ENOMEM;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->io_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->io_base))
 		return PTR_ERR(host->io_base);

 	host->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(host->clk))
 		return PTR_ERR(host->clk);

 	pdata = dev_get_platdata(&pdev->dev);

 	host->dma_params.data = pdata->dma_params;
 	host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
 	host->dma_params.max_burst = 16;
 	host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;

 	dev_set_drvdata(&pdev->dev, host);

 	ret = devm_snd_soc_register_component(&pdev->dev, &spdif_out_component,
 					      &spdif_out_dai, 1);
 	if (ret)
 		return ret;

 	return devm_spear_pcm_platform_register(&pdev->dev, &host->config,
 						pdata->filter);
 }

 #ifdef CONFIG_PM
 static int spdif_out_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

 	if (host->running)
 		clk_disable(host->clk);

 	return 0;
 }

 static int spdif_out_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

 	if (host->running) {
 		clk_enable(host->clk);
 		spdif_out_configure(host);
 		spdif_out_clock(host, host->saved_params.core_freq,
 				host->saved_params.rate);
 	}
 	return 0;
 }

 static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
 		spdif_out_resume);

 #define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)

 #else
 #define SPDIF_OUT_DEV_PM_OPS NULL

 #endif

 static struct platform_driver spdif_out_driver = {
 	.probe		= spdif_out_probe,
 	.driver		= {
 		.name	= "spdif-out",
 		.pm	= SPDIF_OUT_DEV_PM_OPS,
 	},
 };

 module_platform_driver(spdif_out_driver);

 MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
 MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:spdif_out");
	/*
	* ALSA SoC SPDIF Out Audio Layer for spear processors
	*
	* Copyright (C) 2012 ST Microelectronics
	* Vipin Kumar <vipin.kumar@st.com>
	*
	* This file is licensed under the terms of the GNU General Public
	* License version 2. This program is licensed "as is" without any
	* warranty of any kind, whether express or implied.
	*/

	#include <linux/clk.h>
	#include <linux/delay.h>
	#include <linux/device.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/ioport.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <sound/dmaengine_pcm.h>
	#include <sound/soc.h>
	#include <sound/spear_dma.h>
	#include <sound/spear_spdif.h>
	#include "spdif_out_regs.h"
	#include "spear_pcm.h"

	struct spdif_out_params {
	u32 rate;
	u32 core_freq;
	u32 mute;
	};

	struct spdif_out_dev {
	struct clk *clk;
	struct spear_dma_data dma_params;
	struct spdif_out_params saved_params;
	u32 running;
	void __iomem *io_base;
	struct snd_dmaengine_dai_dma_data dma_params_tx;
	struct snd_dmaengine_pcm_config config;
	};

	static void spdif_out_configure(struct spdif_out_dev *host)
	{
	writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
	mdelay(1);
	writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
	host->io_base + SPDIF_OUT_SOFT_RST);

	writel(SPDIF_OUT_FDMA_TRIG_16 \| SPDIF_OUT_MEMFMT_16_16 \|
	SPDIF_OUT_VALID_HW \| SPDIF_OUT_USER_HW \|
	SPDIF_OUT_CHNLSTA_HW \| SPDIF_OUT_PARITY_HW,
	host->io_base + SPDIF_OUT_CFG);

	writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
	writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
	}

	static int spdif_out_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *cpu_dai)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
	int ret;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	return -EINVAL;

	ret = clk_enable(host->clk);
	if (ret)
	return ret;

	host->running = true;
	spdif_out_configure(host);

	return 0;
	}

	static void spdif_out_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	return;

	clk_disable(host->clk);
	host->running = false;
	}

	static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
	u32 rate)
	{
	u32 divider, ctrl;

	clk_set_rate(host->clk, core_freq);
	divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));

	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
	ctrl &= ~SPDIF_DIVIDER_MASK;
	ctrl \|= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
	}

	static int spdif_out_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 rate, core_freq;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	return -EINVAL;

	rate = params_rate(params);

	switch (rate) {
	case 8000:
	case 16000:
	case 32000:
	case 64000:
	/*
	* The clock is multiplied by 10 to bring it to feasible range
	* of frequencies for sscg
	*/
	core_freq = 64000 * 128 * 10; /* 81.92 MHz */
	break;
	case 5512:
	case 11025:
	case 22050:
	case 44100:
	case 88200:
	case 176400:
	core_freq = 176400 * 128; /* 22.5792 MHz */
	break;
	case 48000:
	case 96000:
	case 192000:
	default:
	core_freq = 192000 * 128; /* 24.576 MHz */
	break;
	}

	spdif_out_clock(host, core_freq, rate);
	host->saved_params.core_freq = core_freq;
	host->saved_params.rate = rate;

	return 0;
	}

	static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
	struct snd_soc_dai *dai)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 ctrl;
	int ret = 0;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	return -EINVAL;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
	ctrl &= ~SPDIF_OPMODE_MASK;
	if (!host->saved_params.mute)
	ctrl \|= SPDIF_OPMODE_AUD_DATA \|
	SPDIF_STATE_NORMAL;
	else
	ctrl \|= SPDIF_OPMODE_MUTE_PCM;
	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
	break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
	ctrl &= ~SPDIF_OPMODE_MASK;
	ctrl \|= SPDIF_OPMODE_OFF;
	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
	break;

	default:
	ret = -EINVAL;
	break;
	}
	return ret;
	}

	static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 val;

	host->saved_params.mute = mute;
	val = readl(host->io_base + SPDIF_OUT_CTRL);
	val &= ~SPDIF_OPMODE_MASK;

	if (mute)
	val \|= SPDIF_OPMODE_MUTE_PCM;
	else {
	if (host->running)
	val \|= SPDIF_OPMODE_AUD_DATA \| SPDIF_STATE_NORMAL;
	else
	val \|= SPDIF_OPMODE_OFF;
	}

	writel(val, host->io_base + SPDIF_OUT_CTRL);
	return 0;
	}

	static int spdif_mute_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	ucontrol->value.integer.value[0] = host->saved_params.mute;
	return 0;
	}

	static int spdif_mute_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	if (host->saved_params.mute == ucontrol->value.integer.value[0])
	return 0;

	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);

	return 1;
	}
	static const struct snd_kcontrol_new spdif_out_controls[] = {
	SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
	spdif_mute_get, spdif_mute_put),
	};

	static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
	{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

	host->dma_params_tx.filter_data = &host->dma_params;
	dai->playback_dma_data = &host->dma_params_tx;

	return snd_soc_add_dai_controls(dai, spdif_out_controls,
	ARRAY_SIZE(spdif_out_controls));
	}

	static const struct snd_soc_dai_ops spdif_out_dai_ops = {
	.digital_mute = spdif_digital_mute,
	.startup = spdif_out_startup,
	.shutdown = spdif_out_shutdown,
	.trigger = spdif_out_trigger,
	.hw_params = spdif_out_hw_params,
	};

	static struct snd_soc_dai_driver spdif_out_dai = {
	.playback = {
	.channels_min = 2,
	.channels_max = 2,
	.rates = (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000 \| \
	SNDRV_PCM_RATE_192000),
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.probe = spdif_soc_dai_probe,
	.ops = &spdif_out_dai_ops,
	};

	static const struct snd_soc_component_driver spdif_out_component = {
	.name = "spdif-out",
	};

	static int spdif_out_probe(struct platform_device *pdev)
	{
	struct spdif_out_dev *host;
	struct spear_spdif_platform_data *pdata;
	struct resource *res;
	int ret;

	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
	if (!host) {
	dev_warn(&pdev->dev, "kzalloc fail\n");
	return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	host->io_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(host->io_base))
	return PTR_ERR(host->io_base);

	host->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(host->clk))
	return PTR_ERR(host->clk);

	pdata = dev_get_platdata(&pdev->dev);

	host->dma_params.data = pdata->dma_params;
	host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
	host->dma_params.max_burst = 16;
	host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;

	dev_set_drvdata(&pdev->dev, host);

	ret = devm_snd_soc_register_component(&pdev->dev, &spdif_out_component,
	&spdif_out_dai, 1);
	if (ret)
	return ret;

	return devm_spear_pcm_platform_register(&pdev->dev, &host->config,
	pdata->filter);
	}

	#ifdef CONFIG_PM
	static int spdif_out_suspend(struct device *dev)
	{
	struct platform_device *pdev = to_platform_device(dev);
	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

	if (host->running)
	clk_disable(host->clk);

	return 0;
	}

	static int spdif_out_resume(struct device *dev)
	{
	struct platform_device *pdev = to_platform_device(dev);
	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

	if (host->running) {
	clk_enable(host->clk);
	spdif_out_configure(host);
	spdif_out_clock(host, host->saved_params.core_freq,
	host->saved_params.rate);
	}
	return 0;
	}

	static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
	spdif_out_resume);

	#define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)

	#else
	#define SPDIF_OUT_DEV_PM_OPS NULL

	#endif

	static struct platform_driver spdif_out_driver = {
	.probe = spdif_out_probe,
	.driver = {
	.name = "spdif-out",
	.pm = SPDIF_OUT_DEV_PM_OPS,
	},
	};

	module_platform_driver(spdif_out_driver);

	MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
	MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:spdif_out");