sound/soc/sh/rcar/ctu.c - third_party/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // ctu.c
 //
 // Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

 #include "rsnd.h"

 #define CTU_NAME_SIZE	16
 #define CTU_NAME "ctu"

 /*
  * User needs to setup CTU by amixer, and its settings are
  * based on below registers
  *
  * CTUn_CPMDR : amixser set "CTU Pass"
  * CTUn_SV0xR : amixser set "CTU SV0"
  * CTUn_SV1xR : amixser set "CTU SV1"
  * CTUn_SV2xR : amixser set "CTU SV2"
  * CTUn_SV3xR : amixser set "CTU SV3"
  *
  * [CTU Pass]
  * 0000: default
  * 0001: Connect input data of channel 0
  * 0010: Connect input data of channel 1
  * 0011: Connect input data of channel 2
  * 0100: Connect input data of channel 3
  * 0101: Connect input data of channel 4
  * 0110: Connect input data of channel 5
  * 0111: Connect input data of channel 6
  * 1000: Connect input data of channel 7
  * 1001: Connect calculated data by scale values of matrix row 0
  * 1010: Connect calculated data by scale values of matrix row 1
  * 1011: Connect calculated data by scale values of matrix row 2
  * 1100: Connect calculated data by scale values of matrix row 3
  *
  * [CTU SVx]
  * [Output0] = [SV00, SV01, SV02, SV03, SV04, SV05, SV06, SV07]
  * [Output1] = [SV10, SV11, SV12, SV13, SV14, SV15, SV16, SV17]
  * [Output2] = [SV20, SV21, SV22, SV23, SV24, SV25, SV26, SV27]
  * [Output3] = [SV30, SV31, SV32, SV33, SV34, SV35, SV36, SV37]
  * [Output4] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
  * [Output5] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
  * [Output6] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
  * [Output7] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
  *
  * [SVxx]
  * Plus					Minus
  * value	time		dB	value		time		dB
  * -----------------------------------------------------------------------
  * H'7F_FFFF	2		6	H'80_0000	2		6
  * ...
  * H'40_0000	1		0	H'C0_0000	1		0
  * ...
  * H'00_0001	2.38 x 10^-7	-132
  * H'00_0000	0		Mute	H'FF_FFFF	2.38 x 10^-7	-132
  *
  *
  * Ex) Input ch -> Output ch
  *	1ch     ->  0ch
  *	0ch     ->  1ch
  *
  *	amixer set "CTU Reset" on
  *	amixer set "CTU Pass" 9,10
  *	amixer set "CTU SV0" 0,4194304
  *	amixer set "CTU SV1" 4194304,0
  * or
  *	amixer set "CTU Reset" on
  *	amixer set "CTU Pass" 2,1
  */

 struct rsnd_ctu {
 	struct rsnd_mod mod;
 	struct rsnd_kctrl_cfg_m pass;
 	struct rsnd_kctrl_cfg_m sv[4];
 	struct rsnd_kctrl_cfg_s reset;
 	int channels;
 	u32 flags;
 };

 #define KCTRL_INITIALIZED	(1 << 0)

 #define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
 #define for_each_rsnd_ctu(pos, priv, i)					\
 	for ((i) = 0;							\
 	     ((i) < rsnd_ctu_nr(priv)) &&				\
 		     ((pos) = (struct rsnd_ctu *)(priv)->ctu + i);	\
 	     i++)

 #define rsnd_mod_to_ctu(_mod)	\
 	container_of((_mod), struct rsnd_ctu, mod)

 #define rsnd_ctu_get(priv, id) ((struct rsnd_ctu *)(priv->ctu) + id)

 static void rsnd_ctu_activation(struct rsnd_mod *mod)
 {
 	rsnd_mod_write(mod, CTU_SWRSR, 0);
 	rsnd_mod_write(mod, CTU_SWRSR, 1);
 }

 static void rsnd_ctu_halt(struct rsnd_mod *mod)
 {
 	rsnd_mod_write(mod, CTU_CTUIR, 1);
 	rsnd_mod_write(mod, CTU_SWRSR, 0);
 }

 static int rsnd_ctu_probe_(struct rsnd_mod *mod,
 			   struct rsnd_dai_stream *io,
 			   struct rsnd_priv *priv)
 {
 	return rsnd_cmd_attach(io, rsnd_mod_id(mod));
 }

 static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
 			       struct rsnd_mod *mod)
 {
 	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
 	u32 cpmdr = 0;
 	u32 scmdr = 0;
 	int i, j;

 	for (i = 0; i < RSND_MAX_CHANNELS; i++) {
 		u32 val = rsnd_kctrl_valm(ctu->pass, i);

 		cpmdr |= val << (28 - (i * 4));

 		if ((val > 0x8) && (scmdr < (val - 0x8)))
 			scmdr = val - 0x8;
 	}

 	rsnd_mod_write(mod, CTU_CTUIR, 1);

 	rsnd_mod_write(mod, CTU_ADINR, rsnd_runtime_channel_original(io));

 	rsnd_mod_write(mod, CTU_CPMDR, cpmdr);

 	rsnd_mod_write(mod, CTU_SCMDR, scmdr);

 	for (i = 0; i < 4; i++) {

 		if (i >= scmdr)
 			break;

 		for (j = 0; j < RSND_MAX_CHANNELS; j++)
 			rsnd_mod_write(mod, CTU_SVxxR(i, j), rsnd_kctrl_valm(ctu->sv[i], j));
 	}

 	rsnd_mod_write(mod, CTU_CTUIR, 0);
 }

 static void rsnd_ctu_value_reset(struct rsnd_dai_stream *io,
 				 struct rsnd_mod *mod)
 {
 	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
 	int i;

 	if (!rsnd_kctrl_vals(ctu->reset))
 		return;

 	for (i = 0; i < RSND_MAX_CHANNELS; i++) {
 		rsnd_kctrl_valm(ctu->pass, i) = 0;
 		rsnd_kctrl_valm(ctu->sv[0],  i) = 0;
 		rsnd_kctrl_valm(ctu->sv[1],  i) = 0;
 		rsnd_kctrl_valm(ctu->sv[2],  i) = 0;
 		rsnd_kctrl_valm(ctu->sv[3],  i) = 0;
 	}
 	rsnd_kctrl_vals(ctu->reset) = 0;
 }

 static int rsnd_ctu_init(struct rsnd_mod *mod,
 			 struct rsnd_dai_stream *io,
 			 struct rsnd_priv *priv)
 {
 	int ret;

 	ret = rsnd_mod_power_on(mod);
 	if (ret < 0)
 		return ret;

 	rsnd_ctu_activation(mod);

 	rsnd_ctu_value_init(io, mod);

 	return 0;
 }

 static int rsnd_ctu_quit(struct rsnd_mod *mod,
 			 struct rsnd_dai_stream *io,
 			 struct rsnd_priv *priv)
 {
 	rsnd_ctu_halt(mod);

 	rsnd_mod_power_off(mod);

 	return 0;
 }

 static int rsnd_ctu_pcm_new(struct rsnd_mod *mod,
 			    struct rsnd_dai_stream *io,
 			    struct snd_soc_pcm_runtime *rtd)
 {
 	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
 	int ret;

 	if (rsnd_flags_has(ctu, KCTRL_INITIALIZED))
 		return 0;

 	/* CTU Pass */
 	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU Pass",
 			       rsnd_kctrl_accept_anytime,
 			       NULL,
 			       &ctu->pass, RSND_MAX_CHANNELS,
 			       0xC);

 	/* ROW0 */
 	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV0",
 			       rsnd_kctrl_accept_anytime,
 			       NULL,
 			       &ctu->sv[0], RSND_MAX_CHANNELS,
 			       0x00FFFFFF);
 	if (ret < 0)
 		return ret;

 	/* ROW1 */
 	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV1",
 			       rsnd_kctrl_accept_anytime,
 			       NULL,
 			       &ctu->sv[1], RSND_MAX_CHANNELS,
 			       0x00FFFFFF);
 	if (ret < 0)
 		return ret;

 	/* ROW2 */
 	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV2",
 			       rsnd_kctrl_accept_anytime,
 			       NULL,
 			       &ctu->sv[2], RSND_MAX_CHANNELS,
 			       0x00FFFFFF);
 	if (ret < 0)
 		return ret;

 	/* ROW3 */
 	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV3",
 			       rsnd_kctrl_accept_anytime,
 			       NULL,
 			       &ctu->sv[3], RSND_MAX_CHANNELS,
 			       0x00FFFFFF);
 	if (ret < 0)
 		return ret;

 	/* Reset */
 	ret = rsnd_kctrl_new_s(mod, io, rtd, "CTU Reset",
 			       rsnd_kctrl_accept_anytime,
 			       rsnd_ctu_value_reset,
 			       &ctu->reset, 1);

 	rsnd_flags_set(ctu, KCTRL_INITIALIZED);

 	return ret;
 }

 static int rsnd_ctu_id(struct rsnd_mod *mod)
 {
 	/*
 	 * ctu00: -> 0, ctu01: -> 0, ctu02: -> 0, ctu03: -> 0
 	 * ctu10: -> 1, ctu11: -> 1, ctu12: -> 1, ctu13: -> 1
 	 */
 	return mod->id / 4;
 }

 static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
 {
 	/*
 	 * ctu00: -> 0, ctu01: -> 1, ctu02: -> 2, ctu03: -> 3
 	 * ctu10: -> 0, ctu11: -> 1, ctu12: -> 2, ctu13: -> 3
 	 */
 	return mod->id % 4;
 }

 static struct rsnd_mod_ops rsnd_ctu_ops = {
 	.name		= CTU_NAME,
 	.probe		= rsnd_ctu_probe_,
 	.init		= rsnd_ctu_init,
 	.quit		= rsnd_ctu_quit,
 	.pcm_new	= rsnd_ctu_pcm_new,
 	.get_status	= rsnd_mod_get_status,
 	.id		= rsnd_ctu_id,
 	.id_sub		= rsnd_ctu_id_sub,
 	.id_cmd		= rsnd_mod_id_raw,
 };

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

 	return rsnd_mod_get(rsnd_ctu_get(priv, id));
 }

 int rsnd_ctu_probe(struct rsnd_priv *priv)
 {
 	struct device_node *node;
 	struct device_node *np;
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct rsnd_ctu *ctu;
 	struct clk *clk;
 	char name[CTU_NAME_SIZE];
 	int i, nr, ret;

 	/* This driver doesn't support Gen1 at this point */
 	if (rsnd_is_gen1(priv))
 		return 0;

 	node = rsnd_ctu_of_node(priv);
 	if (!node)
 		return 0; /* not used is not error */

 	nr = of_get_child_count(node);
 	if (!nr) {
 		ret = -EINVAL;
 		goto rsnd_ctu_probe_done;
 	}

 	ctu = devm_kcalloc(dev, nr, sizeof(*ctu), GFP_KERNEL);
 	if (!ctu) {
 		ret = -ENOMEM;
 		goto rsnd_ctu_probe_done;
 	}

 	priv->ctu_nr	= nr;
 	priv->ctu	= ctu;

 	i = 0;
 	ret = 0;
 	for_each_child_of_node(node, np) {
 		ctu = rsnd_ctu_get(priv, i);

 		/*
 		 * CTU00, CTU01, CTU02, CTU03 => CTU0
 		 * CTU10, CTU11, CTU12, CTU13 => CTU1
 		 */
 		snprintf(name, CTU_NAME_SIZE, "%s.%d",
 			 CTU_NAME, i / 4);

 		clk = devm_clk_get(dev, name);
 		if (IS_ERR(clk)) {
 			ret = PTR_ERR(clk);
 			of_node_put(np);
 			goto rsnd_ctu_probe_done;
 		}

 		ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
 				    clk, RSND_MOD_CTU, i);
 		if (ret) {
 			of_node_put(np);
 			goto rsnd_ctu_probe_done;
 		}

 		i++;
 	}


 rsnd_ctu_probe_done:
 	of_node_put(node);

 	return ret;
 }

 void rsnd_ctu_remove(struct rsnd_priv *priv)
 {
 	struct rsnd_ctu *ctu;
 	int i;

 	for_each_rsnd_ctu(ctu, priv, i) {
 		rsnd_mod_quit(rsnd_mod_get(ctu));
 	}
 }
	// SPDX-License-Identifier: GPL-2.0
	//
	// ctu.c
	//
	// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

	#include "rsnd.h"

	#define CTU_NAME_SIZE 16
	#define CTU_NAME "ctu"

	/*
	* User needs to setup CTU by amixer, and its settings are
	* based on below registers
	*
	* CTUn_CPMDR : amixser set "CTU Pass"
	* CTUn_SV0xR : amixser set "CTU SV0"
	* CTUn_SV1xR : amixser set "CTU SV1"
	* CTUn_SV2xR : amixser set "CTU SV2"
	* CTUn_SV3xR : amixser set "CTU SV3"
	*
	* [CTU Pass]
	* 0000: default
	* 0001: Connect input data of channel 0
	* 0010: Connect input data of channel 1
	* 0011: Connect input data of channel 2
	* 0100: Connect input data of channel 3
	* 0101: Connect input data of channel 4
	* 0110: Connect input data of channel 5
	* 0111: Connect input data of channel 6
	* 1000: Connect input data of channel 7
	* 1001: Connect calculated data by scale values of matrix row 0
	* 1010: Connect calculated data by scale values of matrix row 1
	* 1011: Connect calculated data by scale values of matrix row 2
	* 1100: Connect calculated data by scale values of matrix row 3
	*
	* [CTU SVx]
	* [Output0] = [SV00, SV01, SV02, SV03, SV04, SV05, SV06, SV07]
	* [Output1] = [SV10, SV11, SV12, SV13, SV14, SV15, SV16, SV17]
	* [Output2] = [SV20, SV21, SV22, SV23, SV24, SV25, SV26, SV27]
	* [Output3] = [SV30, SV31, SV32, SV33, SV34, SV35, SV36, SV37]
	* [Output4] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
	* [Output5] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
	* [Output6] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
	* [Output7] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
	*
	* [SVxx]
	* Plus Minus
	* value time dB value time dB
	* -----------------------------------------------------------------------
	* H'7F_FFFF 2 6 H'80_0000 2 6
	* ...
	* H'40_0000 1 0 H'C0_0000 1 0
	* ...
	* H'00_0001 2.38 x 10^-7 -132
	* H'00_0000 0 Mute H'FF_FFFF 2.38 x 10^-7 -132
	*
	*
	* Ex) Input ch -> Output ch
	* 1ch -> 0ch
	* 0ch -> 1ch
	*
	* amixer set "CTU Reset" on
	* amixer set "CTU Pass" 9,10
	* amixer set "CTU SV0" 0,4194304
	* amixer set "CTU SV1" 4194304,0
	* or
	* amixer set "CTU Reset" on
	* amixer set "CTU Pass" 2,1
	*/

	struct rsnd_ctu {
	struct rsnd_mod mod;
	struct rsnd_kctrl_cfg_m pass;
	struct rsnd_kctrl_cfg_m sv[4];
	struct rsnd_kctrl_cfg_s reset;
	int channels;
	u32 flags;
	};

	#define KCTRL_INITIALIZED (1 << 0)

	#define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
	#define for_each_rsnd_ctu(pos, priv, i) \
	for ((i) = 0; \
	((i) < rsnd_ctu_nr(priv)) && \
	((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
	i++)

	#define rsnd_mod_to_ctu(_mod) \
	container_of((_mod), struct rsnd_ctu, mod)

	#define rsnd_ctu_get(priv, id) ((struct rsnd_ctu *)(priv->ctu) + id)

	static void rsnd_ctu_activation(struct rsnd_mod *mod)
	{
	rsnd_mod_write(mod, CTU_SWRSR, 0);
	rsnd_mod_write(mod, CTU_SWRSR, 1);
	}

	static void rsnd_ctu_halt(struct rsnd_mod *mod)
	{
	rsnd_mod_write(mod, CTU_CTUIR, 1);
	rsnd_mod_write(mod, CTU_SWRSR, 0);
	}

	static int rsnd_ctu_probe_(struct rsnd_mod *mod,
	struct rsnd_dai_stream *io,
	struct rsnd_priv *priv)
	{
	return rsnd_cmd_attach(io, rsnd_mod_id(mod));
	}

	static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
	struct rsnd_mod *mod)
	{
	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
	u32 cpmdr = 0;
	u32 scmdr = 0;
	int i, j;

	for (i = 0; i < RSND_MAX_CHANNELS; i++) {
	u32 val = rsnd_kctrl_valm(ctu->pass, i);

	cpmdr \|= val << (28 - (i * 4));

	if ((val > 0x8) && (scmdr < (val - 0x8)))
	scmdr = val - 0x8;
	}

	rsnd_mod_write(mod, CTU_CTUIR, 1);

	rsnd_mod_write(mod, CTU_ADINR, rsnd_runtime_channel_original(io));

	rsnd_mod_write(mod, CTU_CPMDR, cpmdr);

	rsnd_mod_write(mod, CTU_SCMDR, scmdr);

	for (i = 0; i < 4; i++) {

	if (i >= scmdr)
	break;

	for (j = 0; j < RSND_MAX_CHANNELS; j++)
	rsnd_mod_write(mod, CTU_SVxxR(i, j), rsnd_kctrl_valm(ctu->sv[i], j));
	}

	rsnd_mod_write(mod, CTU_CTUIR, 0);
	}

	static void rsnd_ctu_value_reset(struct rsnd_dai_stream *io,
	struct rsnd_mod *mod)
	{
	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
	int i;

	if (!rsnd_kctrl_vals(ctu->reset))
	return;

	for (i = 0; i < RSND_MAX_CHANNELS; i++) {
	rsnd_kctrl_valm(ctu->pass, i) = 0;
	rsnd_kctrl_valm(ctu->sv[0], i) = 0;
	rsnd_kctrl_valm(ctu->sv[1], i) = 0;
	rsnd_kctrl_valm(ctu->sv[2], i) = 0;
	rsnd_kctrl_valm(ctu->sv[3], i) = 0;
	}
	rsnd_kctrl_vals(ctu->reset) = 0;
	}

	static int rsnd_ctu_init(struct rsnd_mod *mod,
	struct rsnd_dai_stream *io,
	struct rsnd_priv *priv)
	{
	int ret;

	ret = rsnd_mod_power_on(mod);
	if (ret < 0)
	return ret;

	rsnd_ctu_activation(mod);

	rsnd_ctu_value_init(io, mod);

	return 0;
	}

	static int rsnd_ctu_quit(struct rsnd_mod *mod,
	struct rsnd_dai_stream *io,
	struct rsnd_priv *priv)
	{
	rsnd_ctu_halt(mod);

	rsnd_mod_power_off(mod);

	return 0;
	}

	static int rsnd_ctu_pcm_new(struct rsnd_mod *mod,
	struct rsnd_dai_stream *io,
	struct snd_soc_pcm_runtime *rtd)
	{
	struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
	int ret;

	if (rsnd_flags_has(ctu, KCTRL_INITIALIZED))
	return 0;

	/* CTU Pass */
	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU Pass",
	rsnd_kctrl_accept_anytime,
	NULL,
	&ctu->pass, RSND_MAX_CHANNELS,
	0xC);

	/* ROW0 */
	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV0",
	rsnd_kctrl_accept_anytime,
	NULL,
	&ctu->sv[0], RSND_MAX_CHANNELS,
	0x00FFFFFF);
	if (ret < 0)
	return ret;

	/* ROW1 */
	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV1",
	rsnd_kctrl_accept_anytime,
	NULL,
	&ctu->sv[1], RSND_MAX_CHANNELS,
	0x00FFFFFF);
	if (ret < 0)
	return ret;

	/* ROW2 */
	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV2",
	rsnd_kctrl_accept_anytime,
	NULL,
	&ctu->sv[2], RSND_MAX_CHANNELS,
	0x00FFFFFF);
	if (ret < 0)
	return ret;

	/* ROW3 */
	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV3",
	rsnd_kctrl_accept_anytime,
	NULL,
	&ctu->sv[3], RSND_MAX_CHANNELS,
	0x00FFFFFF);
	if (ret < 0)
	return ret;

	/* Reset */
	ret = rsnd_kctrl_new_s(mod, io, rtd, "CTU Reset",
	rsnd_kctrl_accept_anytime,
	rsnd_ctu_value_reset,
	&ctu->reset, 1);

	rsnd_flags_set(ctu, KCTRL_INITIALIZED);

	return ret;
	}

	static int rsnd_ctu_id(struct rsnd_mod *mod)
	{
	/*
	* ctu00: -> 0, ctu01: -> 0, ctu02: -> 0, ctu03: -> 0
	* ctu10: -> 1, ctu11: -> 1, ctu12: -> 1, ctu13: -> 1
	*/
	return mod->id / 4;
	}

	static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
	{
	/*
	* ctu00: -> 0, ctu01: -> 1, ctu02: -> 2, ctu03: -> 3
	* ctu10: -> 0, ctu11: -> 1, ctu12: -> 2, ctu13: -> 3
	*/
	return mod->id % 4;
	}

	static struct rsnd_mod_ops rsnd_ctu_ops = {
	.name = CTU_NAME,
	.probe = rsnd_ctu_probe_,
	.init = rsnd_ctu_init,
	.quit = rsnd_ctu_quit,
	.pcm_new = rsnd_ctu_pcm_new,
	.get_status = rsnd_mod_get_status,
	.id = rsnd_ctu_id,
	.id_sub = rsnd_ctu_id_sub,
	.id_cmd = rsnd_mod_id_raw,
	};

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

	return rsnd_mod_get(rsnd_ctu_get(priv, id));
	}

	int rsnd_ctu_probe(struct rsnd_priv *priv)
	{
	struct device_node *node;
	struct device_node *np;
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_ctu *ctu;
	struct clk *clk;
	char name[CTU_NAME_SIZE];
	int i, nr, ret;

	/* This driver doesn't support Gen1 at this point */
	if (rsnd_is_gen1(priv))
	return 0;

	node = rsnd_ctu_of_node(priv);
	if (!node)
	return 0; /* not used is not error */

	nr = of_get_child_count(node);
	if (!nr) {
	ret = -EINVAL;
	goto rsnd_ctu_probe_done;
	}

	ctu = devm_kcalloc(dev, nr, sizeof(*ctu), GFP_KERNEL);
	if (!ctu) {
	ret = -ENOMEM;
	goto rsnd_ctu_probe_done;
	}

	priv->ctu_nr = nr;
	priv->ctu = ctu;

	i = 0;
	ret = 0;
	for_each_child_of_node(node, np) {
	ctu = rsnd_ctu_get(priv, i);

	/*
	* CTU00, CTU01, CTU02, CTU03 => CTU0
	* CTU10, CTU11, CTU12, CTU13 => CTU1
	*/
	snprintf(name, CTU_NAME_SIZE, "%s.%d",
	CTU_NAME, i / 4);

	clk = devm_clk_get(dev, name);
	if (IS_ERR(clk)) {
	ret = PTR_ERR(clk);
	of_node_put(np);
	goto rsnd_ctu_probe_done;
	}

	ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
	clk, RSND_MOD_CTU, i);
	if (ret) {
	of_node_put(np);
	goto rsnd_ctu_probe_done;
	}

	i++;
	}


	rsnd_ctu_probe_done:
	of_node_put(node);

	return ret;
	}

	void rsnd_ctu_remove(struct rsnd_priv *priv)
	{
	struct rsnd_ctu *ctu;
	int i;

	for_each_rsnd_ctu(ctu, priv, i) {
	rsnd_mod_quit(rsnd_mod_get(ctu));
	}
	}