sound/soc/sh/rcar/dvc.c - kernel/msm-4.9 - Gitiles

 /*
  * Renesas R-Car DVC support
  *
  * Copyright (C) 2014 Renesas Solutions Corp.
  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.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 as
  * published by the Free Software Foundation.
  */
 #include "rsnd.h"

 #define RSND_DVC_NAME_SIZE	16

 #define DVC_NAME "dvc"

 struct rsnd_dvc {
 	struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
 	struct rsnd_mod mod;
 	struct rsnd_kctrl_cfg_m volume;
 	struct rsnd_kctrl_cfg_m mute;
 	struct rsnd_kctrl_cfg_s ren;	/* Ramp Enable */
 	struct rsnd_kctrl_cfg_s rup;	/* Ramp Rate Up */
 	struct rsnd_kctrl_cfg_s rdown;	/* Ramp Rate Down */
 };

 #define rsnd_mod_to_dvc(_mod)	\
 	container_of((_mod), struct rsnd_dvc, mod)

 #define for_each_rsnd_dvc(pos, priv, i)				\
 	for ((i) = 0;						\
 	     ((i) < rsnd_dvc_nr(priv)) &&			\
 	     ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);	\
 	     i++)

 static const char const *dvc_ramp_rate[] = {
 	"128 dB/1 step",	 /* 00000 */
 	"64 dB/1 step",		 /* 00001 */
 	"32 dB/1 step",		 /* 00010 */
 	"16 dB/1 step",		 /* 00011 */
 	"8 dB/1 step",		 /* 00100 */
 	"4 dB/1 step",		 /* 00101 */
 	"2 dB/1 step",		 /* 00110 */
 	"1 dB/1 step",		 /* 00111 */
 	"0.5 dB/1 step",	 /* 01000 */
 	"0.25 dB/1 step",	 /* 01001 */
 	"0.125 dB/1 step",	 /* 01010 */
 	"0.125 dB/2 steps",	 /* 01011 */
 	"0.125 dB/4 steps",	 /* 01100 */
 	"0.125 dB/8 steps",	 /* 01101 */
 	"0.125 dB/16 steps",	 /* 01110 */
 	"0.125 dB/32 steps",	 /* 01111 */
 	"0.125 dB/64 steps",	 /* 10000 */
 	"0.125 dB/128 steps",	 /* 10001 */
 	"0.125 dB/256 steps",	 /* 10010 */
 	"0.125 dB/512 steps",	 /* 10011 */
 	"0.125 dB/1024 steps",	 /* 10100 */
 	"0.125 dB/2048 steps",	 /* 10101 */
 	"0.125 dB/4096 steps",	 /* 10110 */
 	"0.125 dB/8192 steps",	 /* 10111 */
 };

 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
 {
 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 	u32 val[RSND_DVC_CHANNELS];
 	u32 dvucr = 0;
 	u32 mute = 0;
 	int i;

 	for (i = 0; i < dvc->mute.cfg.size; i++)
 		mute |= (!!dvc->mute.cfg.val[i]) << i;

 	/* Disable DVC Register access */
 	rsnd_mod_write(mod, DVC_DVUER, 0);

 	/* Enable Ramp */
 	if (dvc->ren.val) {
 		dvucr |= 0x10;

 		/* Digital Volume Max */
 		for (i = 0; i < RSND_DVC_CHANNELS; i++)
 			val[i] = dvc->volume.cfg.max;

 		rsnd_mod_write(mod, DVC_VRCTR, 0xff);
 		rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 |
 					       dvc->rdown.val);
 		/*
 		 * FIXME !!
 		 * use scale-downed Digital Volume
 		 * as Volume Ramp
 		 * 7F FFFF -> 3FF
 		 */
 		rsnd_mod_write(mod, DVC_VRDBR,
 			       0x3ff - (dvc->volume.val[0] >> 13));

 	} else {
 		for (i = 0; i < RSND_DVC_CHANNELS; i++)
 			val[i] = dvc->volume.val[i];
 	}

 	/* Enable Digital Volume */
 	dvucr |= 0x100;
 	rsnd_mod_write(mod, DVC_VOL0R, val[0]);
 	rsnd_mod_write(mod, DVC_VOL1R, val[1]);

 	/*  Enable Mute */
 	if (mute) {
 		dvucr |= 0x1;
 		rsnd_mod_write(mod, DVC_ZCMCR, mute);
 	}

 	rsnd_mod_write(mod, DVC_DVUCR, dvucr);

 	/* Enable DVC Register access */
 	rsnd_mod_write(mod, DVC_DVUER, 1);
 }

 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
 			       struct rsnd_priv *priv)
 {
 	struct device *dev = rsnd_priv_to_dev(priv);

 	dev_dbg(dev, "%s[%d] (Gen2) is probed\n",
 		rsnd_mod_name(mod), rsnd_mod_id(mod));

 	return 0;
 }

 static int rsnd_dvc_remove_gen2(struct rsnd_mod *mod,
 				struct rsnd_priv *priv)
 {
 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);

 	rsnd_kctrl_remove(dvc->volume);
 	rsnd_kctrl_remove(dvc->mute);
 	rsnd_kctrl_remove(dvc->ren);
 	rsnd_kctrl_remove(dvc->rup);
 	rsnd_kctrl_remove(dvc->rdown);

 	return 0;
 }

 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
 			 struct rsnd_priv *priv)
 {
 	struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
 	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 	struct device *dev = rsnd_priv_to_dev(priv);
 	int dvc_id = rsnd_mod_id(dvc_mod);
 	int src_id = rsnd_mod_id(src_mod);
 	u32 route[] = {
 		[0] = 0x30000,
 		[1] = 0x30001,
 		[2] = 0x40000,
 		[3] = 0x10000,
 		[4] = 0x20000,
 		[5] = 0x40100
 	};

 	if (src_id >= ARRAY_SIZE(route)) {
 		dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
 		return -EINVAL;
 	}

 	rsnd_mod_hw_start(dvc_mod);

 	/*
 	 * fixme
 	 * it doesn't support CTU/MIX
 	 */
 	rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);

 	rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
 	rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);

 	rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);

 	rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));

 	/* ch0/ch1 Volume */
 	rsnd_dvc_volume_update(dvc_mod);

 	rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);

 	rsnd_adg_set_cmd_timsel_gen2(dvc_mod, io);

 	return 0;
 }

 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 			 struct rsnd_priv *priv)
 {
 	rsnd_mod_hw_stop(mod);

 	return 0;
 }

 static int rsnd_dvc_start(struct rsnd_mod *mod,
 			  struct rsnd_priv *priv)
 {
 	rsnd_mod_write(mod, CMD_CTRL, 0x10);

 	return 0;
 }

 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 			 struct rsnd_priv *priv)
 {
 	rsnd_mod_write(mod, CMD_CTRL, 0);

 	return 0;
 }

 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 			    struct snd_soc_pcm_runtime *rtd)
 {
 	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 	int is_play = rsnd_io_is_play(io);
 	int ret;

 	/* Volume */
 	ret = rsnd_kctrl_new_m(mod, rtd,
 			is_play ?
 			"DVC Out Playback Volume" : "DVC In Capture Volume",
 			rsnd_dvc_volume_update,
 			&dvc->volume, 0x00800000 - 1);
 	if (ret < 0)
 		return ret;

 	/* Mute */
 	ret = rsnd_kctrl_new_m(mod, rtd,
 			is_play ?
 			"DVC Out Mute Switch" : "DVC In Mute Switch",
 			rsnd_dvc_volume_update,
 			&dvc->mute, 1);
 	if (ret < 0)
 		return ret;

 	/* Ramp */
 	ret = rsnd_kctrl_new_s(mod, rtd,
 			is_play ?
 			"DVC Out Ramp Switch" : "DVC In Ramp Switch",
 			rsnd_dvc_volume_update,
 			&dvc->ren, 1);
 	if (ret < 0)
 		return ret;

 	ret = rsnd_kctrl_new_e(mod, rtd,
 			is_play ?
 			"DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
 			&dvc->rup,
 			rsnd_dvc_volume_update,
 			dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
 	if (ret < 0)
 		return ret;

 	ret = rsnd_kctrl_new_e(mod, rtd,
 			is_play ?
 			"DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
 			&dvc->rdown,
 			rsnd_dvc_volume_update,
 			dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));

 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static struct rsnd_mod_ops rsnd_dvc_ops = {
 	.name		= DVC_NAME,
 	.probe		= rsnd_dvc_probe_gen2,
 	.remove		= rsnd_dvc_remove_gen2,
 	.init		= rsnd_dvc_init,
 	.quit		= rsnd_dvc_quit,
 	.start		= rsnd_dvc_start,
 	.stop		= rsnd_dvc_stop,
 	.pcm_new	= rsnd_dvc_pcm_new,
 };

 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 {
 	if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 		id = 0;

 	return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 }

 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 			      const struct rsnd_of_data *of_data,
 			      struct rsnd_priv *priv)
 {
 	struct device_node *node;
 	struct rsnd_dvc_platform_info *dvc_info;
 	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 	struct device *dev = &pdev->dev;
 	int nr;

 	if (!of_data)
 		return;

 	node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 	if (!node)
 		return;

 	nr = of_get_child_count(node);
 	if (!nr)
 		goto rsnd_of_parse_dvc_end;

 	dvc_info = devm_kzalloc(dev,
 				sizeof(struct rsnd_dvc_platform_info) * nr,
 				GFP_KERNEL);
 	if (!dvc_info) {
 		dev_err(dev, "dvc info allocation error\n");
 		goto rsnd_of_parse_dvc_end;
 	}

 	info->dvc_info		= dvc_info;
 	info->dvc_info_nr	= nr;

 rsnd_of_parse_dvc_end:
 	of_node_put(node);
 }

 int rsnd_dvc_probe(struct platform_device *pdev,
 		   const struct rsnd_of_data *of_data,
 		   struct rsnd_priv *priv)
 {
 	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct rsnd_dvc *dvc;
 	struct clk *clk;
 	char name[RSND_DVC_NAME_SIZE];
 	int i, nr;

 	rsnd_of_parse_dvc(pdev, of_data, priv);

 	nr = info->dvc_info_nr;
 	if (!nr)
 		return 0;

 	/* This driver doesn't support Gen1 at this point */
 	if (rsnd_is_gen1(priv)) {
 		dev_warn(dev, "CMD is not supported on Gen1\n");
 		return -EINVAL;
 	}

 	dvc	= devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 	if (!dvc) {
 		dev_err(dev, "CMD allocate failed\n");
 		return -ENOMEM;
 	}

 	priv->dvc_nr	= nr;
 	priv->dvc	= dvc;

 	for_each_rsnd_dvc(dvc, priv, i) {
 		snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 			 DVC_NAME, i);

 		clk = devm_clk_get(dev, name);
 		if (IS_ERR(clk))
 			return PTR_ERR(clk);

 		dvc->info = &info->dvc_info[i];

 		rsnd_mod_init(&dvc->mod, &rsnd_dvc_ops,
 			      clk, RSND_MOD_DVC, i);

 		dev_dbg(dev, "CMD%d probed\n", i);
 	}

 	return 0;
 }
	/*
	* Renesas R-Car DVC support
	*
	* Copyright (C) 2014 Renesas Solutions Corp.
	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.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 as
	* published by the Free Software Foundation.
	*/
	#include "rsnd.h"

	#define RSND_DVC_NAME_SIZE 16

	#define DVC_NAME "dvc"

	struct rsnd_dvc {
	struct rsnd_dvc_platform_info info; / rcar_snd.h */
	struct rsnd_mod mod;
	struct rsnd_kctrl_cfg_m volume;
	struct rsnd_kctrl_cfg_m mute;
	struct rsnd_kctrl_cfg_s ren; /* Ramp Enable */
	struct rsnd_kctrl_cfg_s rup; /* Ramp Rate Up */
	struct rsnd_kctrl_cfg_s rdown; /* Ramp Rate Down */
	};

	#define rsnd_mod_to_dvc(_mod) \
	container_of((_mod), struct rsnd_dvc, mod)

	#define for_each_rsnd_dvc(pos, priv, i) \
	for ((i) = 0; \
	((i) < rsnd_dvc_nr(priv)) && \
	((pos) = (struct rsnd_dvc *)(priv)->dvc + i); \
	i++)

	static const char const *dvc_ramp_rate[] = {
	"128 dB/1 step", /* 00000 */
	"64 dB/1 step", /* 00001 */
	"32 dB/1 step", /* 00010 */
	"16 dB/1 step", /* 00011 */
	"8 dB/1 step", /* 00100 */
	"4 dB/1 step", /* 00101 */
	"2 dB/1 step", /* 00110 */
	"1 dB/1 step", /* 00111 */
	"0.5 dB/1 step", /* 01000 */
	"0.25 dB/1 step", /* 01001 */
	"0.125 dB/1 step", /* 01010 */
	"0.125 dB/2 steps", /* 01011 */
	"0.125 dB/4 steps", /* 01100 */
	"0.125 dB/8 steps", /* 01101 */
	"0.125 dB/16 steps", /* 01110 */
	"0.125 dB/32 steps", /* 01111 */
	"0.125 dB/64 steps", /* 10000 */
	"0.125 dB/128 steps", /* 10001 */
	"0.125 dB/256 steps", /* 10010 */
	"0.125 dB/512 steps", /* 10011 */
	"0.125 dB/1024 steps", /* 10100 */
	"0.125 dB/2048 steps", /* 10101 */
	"0.125 dB/4096 steps", /* 10110 */
	"0.125 dB/8192 steps", /* 10111 */
	};

	static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
	{
	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
	u32 val[RSND_DVC_CHANNELS];
	u32 dvucr = 0;
	u32 mute = 0;
	int i;

	for (i = 0; i < dvc->mute.cfg.size; i++)
	mute \|= (!!dvc->mute.cfg.val[i]) << i;

	/* Disable DVC Register access */
	rsnd_mod_write(mod, DVC_DVUER, 0);

	/* Enable Ramp */
	if (dvc->ren.val) {
	dvucr \|= 0x10;

	/* Digital Volume Max */
	for (i = 0; i < RSND_DVC_CHANNELS; i++)
	val[i] = dvc->volume.cfg.max;

	rsnd_mod_write(mod, DVC_VRCTR, 0xff);
	rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 \|
	dvc->rdown.val);
	/*
	* FIXME !!
	* use scale-downed Digital Volume
	* as Volume Ramp
	* 7F FFFF -> 3FF
	*/
	rsnd_mod_write(mod, DVC_VRDBR,
	0x3ff - (dvc->volume.val[0] >> 13));

	} else {
	for (i = 0; i < RSND_DVC_CHANNELS; i++)
	val[i] = dvc->volume.val[i];
	}

	/* Enable Digital Volume */
	dvucr \|= 0x100;
	rsnd_mod_write(mod, DVC_VOL0R, val[0]);
	rsnd_mod_write(mod, DVC_VOL1R, val[1]);

	/* Enable Mute */
	if (mute) {
	dvucr \|= 0x1;
	rsnd_mod_write(mod, DVC_ZCMCR, mute);
	}

	rsnd_mod_write(mod, DVC_DVUCR, dvucr);

	/* Enable DVC Register access */
	rsnd_mod_write(mod, DVC_DVUER, 1);
	}

	static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
	struct rsnd_priv *priv)
	{
	struct device *dev = rsnd_priv_to_dev(priv);

	dev_dbg(dev, "%s[%d] (Gen2) is probed\n",
	rsnd_mod_name(mod), rsnd_mod_id(mod));

	return 0;
	}

	static int rsnd_dvc_remove_gen2(struct rsnd_mod *mod,
	struct rsnd_priv *priv)
	{
	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);

	rsnd_kctrl_remove(dvc->volume);
	rsnd_kctrl_remove(dvc->mute);
	rsnd_kctrl_remove(dvc->ren);
	rsnd_kctrl_remove(dvc->rup);
	rsnd_kctrl_remove(dvc->rdown);

	return 0;
	}

	static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
	struct rsnd_priv *priv)
	{
	struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
	struct device *dev = rsnd_priv_to_dev(priv);
	int dvc_id = rsnd_mod_id(dvc_mod);
	int src_id = rsnd_mod_id(src_mod);
	u32 route[] = {
	[0] = 0x30000,
	[1] = 0x30001,
	[2] = 0x40000,
	[3] = 0x10000,
	[4] = 0x20000,
	[5] = 0x40100
	};

	if (src_id >= ARRAY_SIZE(route)) {
	dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
	return -EINVAL;
	}

	rsnd_mod_hw_start(dvc_mod);

	/*
	* fixme
	* it doesn't support CTU/MIX
	*/
	rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);

	rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
	rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);

	rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);

	rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));

	/* ch0/ch1 Volume */
	rsnd_dvc_volume_update(dvc_mod);

	rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);

	rsnd_adg_set_cmd_timsel_gen2(dvc_mod, io);

	return 0;
	}

	static int rsnd_dvc_quit(struct rsnd_mod *mod,
	struct rsnd_priv *priv)
	{
	rsnd_mod_hw_stop(mod);

	return 0;
	}

	static int rsnd_dvc_start(struct rsnd_mod *mod,
	struct rsnd_priv *priv)
	{
	rsnd_mod_write(mod, CMD_CTRL, 0x10);

	return 0;
	}

	static int rsnd_dvc_stop(struct rsnd_mod *mod,
	struct rsnd_priv *priv)
	{
	rsnd_mod_write(mod, CMD_CTRL, 0);

	return 0;
	}

	static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
	struct snd_soc_pcm_runtime *rtd)
	{
	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
	int is_play = rsnd_io_is_play(io);
	int ret;

	/* Volume */
	ret = rsnd_kctrl_new_m(mod, rtd,
	is_play ?
	"DVC Out Playback Volume" : "DVC In Capture Volume",
	rsnd_dvc_volume_update,
	&dvc->volume, 0x00800000 - 1);
	if (ret < 0)
	return ret;

	/* Mute */
	ret = rsnd_kctrl_new_m(mod, rtd,
	is_play ?
	"DVC Out Mute Switch" : "DVC In Mute Switch",
	rsnd_dvc_volume_update,
	&dvc->mute, 1);
	if (ret < 0)
	return ret;

	/* Ramp */
	ret = rsnd_kctrl_new_s(mod, rtd,
	is_play ?
	"DVC Out Ramp Switch" : "DVC In Ramp Switch",
	rsnd_dvc_volume_update,
	&dvc->ren, 1);
	if (ret < 0)
	return ret;

	ret = rsnd_kctrl_new_e(mod, rtd,
	is_play ?
	"DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
	&dvc->rup,
	rsnd_dvc_volume_update,
	dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
	if (ret < 0)
	return ret;

	ret = rsnd_kctrl_new_e(mod, rtd,
	is_play ?
	"DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
	&dvc->rdown,
	rsnd_dvc_volume_update,
	dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));

	if (ret < 0)
	return ret;

	return 0;
	}

	static struct rsnd_mod_ops rsnd_dvc_ops = {
	.name = DVC_NAME,
	.probe = rsnd_dvc_probe_gen2,
	.remove = rsnd_dvc_remove_gen2,
	.init = rsnd_dvc_init,
	.quit = rsnd_dvc_quit,
	.start = rsnd_dvc_start,
	.stop = rsnd_dvc_stop,
	.pcm_new = rsnd_dvc_pcm_new,
	};

	struct rsnd_mod rsnd_dvc_mod_get(struct rsnd_priv priv, int id)
	{
	if (WARN_ON(id < 0 \|\| id >= rsnd_dvc_nr(priv)))
	id = 0;

	return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
	}

	static void rsnd_of_parse_dvc(struct platform_device *pdev,
	const struct rsnd_of_data *of_data,
	struct rsnd_priv *priv)
	{
	struct device_node *node;
	struct rsnd_dvc_platform_info *dvc_info;
	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	struct device *dev = &pdev->dev;
	int nr;

	if (!of_data)
	return;

	node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
	if (!node)
	return;

	nr = of_get_child_count(node);
	if (!nr)
	goto rsnd_of_parse_dvc_end;

	dvc_info = devm_kzalloc(dev,
	sizeof(struct rsnd_dvc_platform_info) * nr,
	GFP_KERNEL);
	if (!dvc_info) {
	dev_err(dev, "dvc info allocation error\n");
	goto rsnd_of_parse_dvc_end;
	}

	info->dvc_info = dvc_info;
	info->dvc_info_nr = nr;

	rsnd_of_parse_dvc_end:
	of_node_put(node);
	}

	int rsnd_dvc_probe(struct platform_device *pdev,
	const struct rsnd_of_data *of_data,
	struct rsnd_priv *priv)
	{
	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_dvc *dvc;
	struct clk *clk;
	char name[RSND_DVC_NAME_SIZE];
	int i, nr;

	rsnd_of_parse_dvc(pdev, of_data, priv);

	nr = info->dvc_info_nr;
	if (!nr)
	return 0;

	/* This driver doesn't support Gen1 at this point */
	if (rsnd_is_gen1(priv)) {
	dev_warn(dev, "CMD is not supported on Gen1\n");
	return -EINVAL;
	}

	dvc = devm_kzalloc(dev, sizeof(dvc) nr, GFP_KERNEL);
	if (!dvc) {
	dev_err(dev, "CMD allocate failed\n");
	return -ENOMEM;
	}

	priv->dvc_nr = nr;
	priv->dvc = dvc;

	for_each_rsnd_dvc(dvc, priv, i) {
	snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
	DVC_NAME, i);

	clk = devm_clk_get(dev, name);
	if (IS_ERR(clk))
	return PTR_ERR(clk);

	dvc->info = &info->dvc_info[i];

	rsnd_mod_init(&dvc->mod, &rsnd_dvc_ops,
	clk, RSND_MOD_DVC, i);

	dev_dbg(dev, "CMD%d probed\n", i);
	}

	return 0;
	}