ALSA: hda/cs35l56: Add driver for Cirrus Logic CS35L56 amplifier

Add a driver for the Cirrus Logic CS35L56 amplifier. This uses the same
component binding API as the CS35L41 driver. This is not a standalone
HDA device; it provides control of the CS35L56 for systems that use a
combination of an HDA codec and CS35L56 amplifiers with audio routed
through the HDA codec.

The CS35L56 combines a high-performance mono audio amplifier, Class-H
tracking inductive boost converter, Halo Core(TM) DSP and a DC-DC boost
converter supporting Class-H tracking.

Control interfaces are I2C or SPI through the standard Linux I2C or SPI
bus framework.

Most chip functionality is controlled by on-board ROM firmware that is
always running. Firmware patches can be applied by the driver in the form
of a .wmfw file (firmware patch) and/or a .bin file (system tuning).

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230721132120.5523-12-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

6 files changed, 1217 insertions, 0 deletions

diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index 886255a03e8b..dd6922267a4b 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -130,6 +130,37 @@ config SND_HDA_SCODEC_CS35L41_SPI
 comment "Set to Y if you want auto-loading the side codec driver"
 	depends on SND_HDA=y && SND_HDA_SCODEC_CS35L41_SPI=m
 
+config SND_HDA_SCODEC_CS35L56
+	tristate
+
+config SND_HDA_SCODEC_CS35L56_I2C
+	tristate "Build CS35L56 HD-audio side codec support for I2C Bus"
+	depends on I2C
+	depends on ACPI || COMPILE_TEST
+	depends on SND_SOC
+	select CS_DSP
+	select SND_HDA_GENERIC
+	select SND_SOC_CS35L56_SHARED
+	select SND_HDA_SCODEC_CS35L56
+	select SND_HDA_CS_DSP_CONTROLS
+	help
+	  Say Y or M here to include CS35L56 amplifier support with
+	  I2C control.
+
+config SND_HDA_SCODEC_CS35L56_SPI
+	tristate "Build CS35L56 HD-audio side codec support for SPI Bus"
+	depends on SPI_MASTER
+	depends on ACPI || COMPILE_TEST
+	depends on SND_SOC
+	select CS_DSP
+	select SND_HDA_GENERIC
+	select SND_SOC_CS35L56_SHARED
+	select SND_HDA_SCODEC_CS35L56
+	select SND_HDA_CS_DSP_CONTROLS
+	help
+	  Say Y or M here to include CS35L56 amplifier support with
+	  SPI control.
+
 config SND_HDA_CODEC_REALTEK
 	tristate "Build Realtek HD-audio codec support"
 	select SND_HDA_GENERIC
diff --git a/sound/pci/hda/Makefile b/sound/pci/hda/Makefile
index 00d306104484..c6e6509e7b8e 100644
--- a/sound/pci/hda/Makefile
+++ b/sound/pci/hda/Makefile
@@ -31,6 +31,9 @@ snd-hda-codec-hdmi-objs :=	patch_hdmi.o hda_eld.o
 snd-hda-scodec-cs35l41-objs :=		cs35l41_hda.o
 snd-hda-scodec-cs35l41-i2c-objs :=	cs35l41_hda_i2c.o
 snd-hda-scodec-cs35l41-spi-objs :=	cs35l41_hda_spi.o
+snd-hda-scodec-cs35l56-objs :=		cs35l56_hda.o
+snd-hda-scodec-cs35l56-i2c-objs :=	cs35l56_hda_i2c.o
+snd-hda-scodec-cs35l56-spi-objs :=	cs35l56_hda_spi.o
 snd-hda-cs-dsp-ctls-objs :=		hda_cs_dsp_ctl.o
 
 # common driver
@@ -55,6 +58,9 @@ obj-$(CONFIG_SND_HDA_CODEC_HDMI) += snd-hda-codec-hdmi.o
 obj-$(CONFIG_SND_HDA_SCODEC_CS35L41) += snd-hda-scodec-cs35l41.o
 obj-$(CONFIG_SND_HDA_SCODEC_CS35L41_I2C) += snd-hda-scodec-cs35l41-i2c.o
 obj-$(CONFIG_SND_HDA_SCODEC_CS35L41_SPI) += snd-hda-scodec-cs35l41-spi.o
+obj-$(CONFIG_SND_HDA_SCODEC_CS35L56) += snd-hda-scodec-cs35l56.o
+obj-$(CONFIG_SND_HDA_SCODEC_CS35L56_I2C) += snd-hda-scodec-cs35l56-i2c.o
+obj-$(CONFIG_SND_HDA_SCODEC_CS35L56_SPI) += snd-hda-scodec-cs35l56-spi.o
 obj-$(CONFIG_SND_HDA_CS_DSP_CONTROLS) += snd-hda-cs-dsp-ctls.o
 
 # this must be the last entry after codec drivers;
diff --git a/sound/pci/hda/cs35l56_hda.c b/sound/pci/hda/cs35l56_hda.c
new file mode 100644
index 000000000000..71e95e64f8a4
--- /dev/null
+++ b/sound/pci/hda/cs35l56_hda.c
@@ -0,0 +1,995 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// HDA audio driver for Cirrus Logic CS35L56 smart amp
+//
+// Copyright (C) 2023 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+//
+
+#include <linux/acpi.h>
+#include <linux/debugfs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/hda_codec.h>
+#include <sound/tlv.h>
+#include "cs35l56_hda.h"
+#include "hda_component.h"
+#include "hda_cs_dsp_ctl.h"
+#include "hda_generic.h"
+
+ /*
+  * The cs35l56_hda_dai_config[] reg sequence configures the device as
+  *  ASP1_BCLK_FREQ = 3.072 MHz
+  *  ASP1_RX_WIDTH = 32 cycles per slot, ASP1_TX_WIDTH = 32 cycles per slot, ASP1_FMT = I2S
+  *  ASP1_DOUT_HIZ_CONTROL = Hi-Z during unused timeslots
+  *  ASP1_RX_WL = 24 bits per sample
+  *  ASP1_TX_WL = 24 bits per sample
+  *  ASP1_RXn_EN 1..3 and ASP1_TXn_EN 1..4 disabled
+  */
+static const struct reg_sequence cs35l56_hda_dai_config[] = {
+	{ CS35L56_ASP1_CONTROL1,	0x00000021 },
+	{ CS35L56_ASP1_CONTROL2,	0x20200200 },
+	{ CS35L56_ASP1_CONTROL3,	0x00000003 },
+	{ CS35L56_ASP1_DATA_CONTROL5,	0x00000018 },
+	{ CS35L56_ASP1_DATA_CONTROL1,	0x00000018 },
+	{ CS35L56_ASP1_ENABLES1,	0x00000000 },
+};
+
+static void cs35l56_hda_play(struct cs35l56_hda *cs35l56)
+{
+	unsigned int val;
+	int ret;
+
+	pm_runtime_get_sync(cs35l56->base.dev);
+	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PLAY);
+	if (ret == 0) {
+		/* Wait for firmware to enter PS0 power state */
+		ret = regmap_read_poll_timeout(cs35l56->base.regmap,
+					       CS35L56_TRANSDUCER_ACTUAL_PS,
+					       val, (val == CS35L56_PS0),
+					       CS35L56_PS0_POLL_US,
+					       CS35L56_PS0_TIMEOUT_US);
+		if (ret)
+			dev_warn(cs35l56->base.dev, "PS0 wait failed: %d\n", ret);
+	}
+	regmap_set_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
+			BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
+			cs35l56->asp_tx_mask);
+	cs35l56->playing = true;
+}
+
+static void cs35l56_hda_pause(struct cs35l56_hda *cs35l56)
+{
+	cs35l56->playing = false;
+	cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PAUSE);
+	regmap_clear_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
+			  BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
+			  BIT(CS35L56_ASP_TX1_EN_SHIFT) | BIT(CS35L56_ASP_TX2_EN_SHIFT) |
+			  BIT(CS35L56_ASP_TX3_EN_SHIFT) | BIT(CS35L56_ASP_TX4_EN_SHIFT));
+
+	pm_runtime_mark_last_busy(cs35l56->base.dev);
+	pm_runtime_put_autosuspend(cs35l56->base.dev);
+}
+
+static void cs35l56_hda_playback_hook(struct device *dev, int action)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	dev_dbg(cs35l56->base.dev, "%s()%d: action: %d\n", __func__, __LINE__, action);
+
+	switch (action) {
+	case HDA_GEN_PCM_ACT_PREPARE:
+		if (cs35l56->playing)
+			break;
+
+		/* If we're suspended: flag that resume should start playback */
+		if (cs35l56->suspended) {
+			cs35l56->playing = true;
+			break;
+		}
+
+		cs35l56_hda_play(cs35l56);
+		break;
+	case HDA_GEN_PCM_ACT_CLEANUP:
+		if (!cs35l56->playing)
+			break;
+
+		cs35l56_hda_pause(cs35l56);
+		break;
+	default:
+		break;
+	}
+}
+
+static int __maybe_unused cs35l56_hda_runtime_suspend(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	if (cs35l56->cs_dsp.booted)
+		cs_dsp_stop(&cs35l56->cs_dsp);
+
+	return cs35l56_runtime_suspend_common(&cs35l56->base);
+}
+
+static int __maybe_unused cs35l56_hda_runtime_resume(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cs35l56_runtime_resume_common(&cs35l56->base, false);
+	if (ret < 0)
+		return ret;
+
+	if (cs35l56->cs_dsp.booted) {
+		ret = cs_dsp_run(&cs35l56->cs_dsp);
+		if (ret) {
+			dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
+			goto err;
+		}
+	}
+
+	return 0;
+
+err:
+	cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_ALLOW_AUTO_HIBERNATE);
+	regmap_write(cs35l56->base.regmap, CS35L56_DSP_VIRTUAL1_MBOX_1,
+		     CS35L56_MBOX_CMD_HIBERNATE_NOW);
+
+	regcache_cache_only(cs35l56->base.regmap, true);
+
+	return ret;
+}
+
+static int cs35l56_hda_mixer_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = CS35L56_NUM_INPUT_SRC;
+	if (uinfo->value.enumerated.item >= CS35L56_NUM_INPUT_SRC)
+		uinfo->value.enumerated.item = CS35L56_NUM_INPUT_SRC - 1;
+	strscpy(uinfo->value.enumerated.name, cs35l56_tx_input_texts[uinfo->value.enumerated.item],
+		sizeof(uinfo->value.enumerated.name));
+
+	return 0;
+}
+
+static int cs35l56_hda_mixer_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	unsigned int reg_val;
+	int i;
+
+	regmap_read(cs35l56->base.regmap, kcontrol->private_value, &reg_val);
+	reg_val &= CS35L56_ASP_TXn_SRC_MASK;
+
+	for (i = 0; i < CS35L56_NUM_INPUT_SRC; ++i) {
+		if (cs35l56_tx_input_values[i] == reg_val) {
+			ucontrol->value.enumerated.item[0] = i;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int cs35l56_hda_mixer_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	unsigned int item = ucontrol->value.enumerated.item[0];
+	bool changed;
+
+	if (item >= CS35L56_NUM_INPUT_SRC)
+		return -EINVAL;
+
+	regmap_update_bits_check(cs35l56->base.regmap, kcontrol->private_value,
+				 CS35L56_INPUT_MASK, cs35l56_tx_input_values[item],
+				 &changed);
+
+	return changed;
+}
+
+static int cs35l56_hda_posture_info(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = CS35L56_MAIN_POSTURE_MIN;
+	uinfo->value.integer.max = CS35L56_MAIN_POSTURE_MAX;
+	return 0;
+}
+
+static int cs35l56_hda_posture_get(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	unsigned int pos;
+	int ret;
+
+	ret = regmap_read(cs35l56->base.regmap, CS35L56_MAIN_POSTURE_NUMBER, &pos);
+	if (ret)
+		return ret;
+
+	ucontrol->value.integer.value[0] = pos;
+
+	return ret;
+}
+
+static int cs35l56_hda_posture_put(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	unsigned long pos = ucontrol->value.integer.value[0];
+	bool changed;
+	int ret;
+
+	if ((pos < CS35L56_MAIN_POSTURE_MIN) ||
+	    (pos > CS35L56_MAIN_POSTURE_MAX))
+		return -EINVAL;
+
+	ret = regmap_update_bits_check(cs35l56->base.regmap,
+				       CS35L56_MAIN_POSTURE_NUMBER,
+				       CS35L56_MAIN_POSTURE_MASK,
+				       pos, &changed);
+	if (ret)
+		return ret;
+
+	return changed;
+}
+
+static const struct {
+	const char *name;
+	unsigned int reg;
+} cs35l56_hda_mixer_controls[] = {
+	{ "ASP1 TX1 Source", CS35L56_ASP1TX1_INPUT },
+	{ "ASP1 TX2 Source", CS35L56_ASP1TX2_INPUT },
+	{ "ASP1 TX3 Source", CS35L56_ASP1TX3_INPUT },
+	{ "ASP1 TX4 Source", CS35L56_ASP1TX4_INPUT },
+};
+
+static const DECLARE_TLV_DB_SCALE(cs35l56_hda_vol_tlv, -10000, 25, 0);
+
+static int cs35l56_hda_vol_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.step = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = CS35L56_MAIN_RENDER_USER_VOLUME_MAX -
+				   CS35L56_MAIN_RENDER_USER_VOLUME_MIN;
+
+	return 0;
+}
+
+static int cs35l56_hda_vol_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	unsigned int raw_vol;
+	int vol;
+	int ret;
+
+	ret = regmap_read(cs35l56->base.regmap, CS35L56_MAIN_RENDER_USER_VOLUME, &raw_vol);
+
+	if (ret)
+		return ret;
+
+	vol = (s16)(raw_vol & 0xFFFF);
+	vol >>= CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT;
+
+	if (vol & BIT(CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT))
+		vol |= ~((int)(BIT(CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT) - 1));
+
+	ucontrol->value.integer.value[0] = vol - CS35L56_MAIN_RENDER_USER_VOLUME_MIN;
+
+	return 0;
+}
+
+static int cs35l56_hda_vol_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
+	long vol = ucontrol->value.integer.value[0];
+	unsigned int raw_vol;
+	bool changed;
+	int ret;
+
+	if ((vol < 0) || (vol > (CS35L56_MAIN_RENDER_USER_VOLUME_MAX -
+				 CS35L56_MAIN_RENDER_USER_VOLUME_MIN)))
+		return -EINVAL;
+
+	raw_vol = (vol + CS35L56_MAIN_RENDER_USER_VOLUME_MIN) <<
+		  CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT;
+
+	ret = regmap_update_bits_check(cs35l56->base.regmap,
+				       CS35L56_MAIN_RENDER_USER_VOLUME,
+				       CS35L56_MAIN_RENDER_USER_VOLUME_MASK,
+				       raw_vol, &changed);
+	if (ret)
+		return ret;
+
+	return changed;
+}
+
+static void cs35l56_hda_create_controls(struct cs35l56_hda *cs35l56)
+{
+	struct snd_kcontrol_new ctl_template = {
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+		.info = cs35l56_hda_posture_info,
+		.get = cs35l56_hda_posture_get,
+		.put = cs35l56_hda_posture_put,
+	};
+	char name[64];
+	int i;
+
+	snprintf(name, sizeof(name), "%s Posture Number", cs35l56->amp_name);
+	ctl_template.name = name;
+	cs35l56->posture_ctl = snd_ctl_new1(&ctl_template, cs35l56);
+	if (snd_ctl_add(cs35l56->codec->card, cs35l56->posture_ctl))
+		dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n", ctl_template.name);
+
+	/* Mixer controls */
+	ctl_template.info = cs35l56_hda_mixer_info;
+	ctl_template.get = cs35l56_hda_mixer_get;
+	ctl_template.put = cs35l56_hda_mixer_put;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cs35l56->mixer_ctl) != ARRAY_SIZE(cs35l56_hda_mixer_controls));
+
+	for (i = 0; i < ARRAY_SIZE(cs35l56_hda_mixer_controls); ++i) {
+		snprintf(name, sizeof(name), "%s %s", cs35l56->amp_name,
+			 cs35l56_hda_mixer_controls[i].name);
+		ctl_template.private_value = cs35l56_hda_mixer_controls[i].reg;
+		cs35l56->mixer_ctl[i] = snd_ctl_new1(&ctl_template, cs35l56);
+		if (snd_ctl_add(cs35l56->codec->card, cs35l56->mixer_ctl[i])) {
+			dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n",
+				ctl_template.name);
+		}
+	}
+
+	ctl_template.info = cs35l56_hda_vol_info;
+	ctl_template.get = cs35l56_hda_vol_get;
+	ctl_template.put = cs35l56_hda_vol_put;
+	ctl_template.access = (SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ);
+	ctl_template.tlv.p = cs35l56_hda_vol_tlv;
+	snprintf(name, sizeof(name), "%s Speaker Playback Volume", cs35l56->amp_name);
+	ctl_template.name = name;
+	cs35l56->volume_ctl = snd_ctl_new1(&ctl_template, cs35l56);
+	if (snd_ctl_add(cs35l56->codec->card, cs35l56->volume_ctl))
+		dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n", ctl_template.name);
+}
+
+static void cs35l56_hda_remove_controls(struct cs35l56_hda *cs35l56)
+{
+	int i;
+
+	for (i = ARRAY_SIZE(cs35l56->mixer_ctl) - 1; i >= 0; i--)
+		snd_ctl_remove(cs35l56->codec->card, cs35l56->mixer_ctl[i]);
+
+	snd_ctl_remove(cs35l56->codec->card, cs35l56->posture_ctl);
+	snd_ctl_remove(cs35l56->codec->card, cs35l56->volume_ctl);
+}
+
+static const struct cs_dsp_client_ops cs35l56_hda_client_ops = {
+	.control_remove = hda_cs_dsp_control_remove,
+};
+
+static int cs35l56_hda_request_firmware_file(struct cs35l56_hda *cs35l56,
+					     const struct firmware **firmware, char **filename,
+					     const char *dir, const char *system_name,
+					     const char *amp_name,
+					     const char *filetype)
+{
+	char *s, c;
+	int ret = 0;
+
+	if (system_name && amp_name)
+		*filename = kasprintf(GFP_KERNEL, "%scs35l56%s-%02x-dsp1-misc-%s-%s.%s", dir,
+				      cs35l56->base.secured ? "s" : "", cs35l56->base.rev,
+				      system_name, amp_name, filetype);
+	else if (system_name)
+		*filename = kasprintf(GFP_KERNEL, "%scs35l56%s-%02x-dsp1-misc-%s.%s", dir,
+				      cs35l56->base.secured ? "s" : "", cs35l56->base.rev,
+				      system_name, filetype);
+	else
+		*filename = kasprintf(GFP_KERNEL, "%scs35l56%s-%02x-dsp1-misc.%s", dir,
+				      cs35l56->base.secured ? "s" : "", cs35l56->base.rev,
+				      filetype);
+
+	if (!*filename)
+		return -ENOMEM;
+
+	/*
+	 * Make sure that filename is lower-case and any non alpha-numeric
+	 * characters except full stop and forward slash are replaced with
+	 * hyphens.
+	 */
+	s = *filename;
+	while (*s) {
+		c = *s;
+		if (isalnum(c))
+			*s = tolower(c);
+		else if (c != '.' && c != '/')
+			*s = '-';
+		s++;
+	}
+
+	ret = firmware_request_nowarn(firmware, *filename, cs35l56->base.dev);
+	if (ret) {
+		dev_dbg(cs35l56->base.dev, "Failed to request '%s'\n", *filename);
+		kfree(*filename);
+		*filename = NULL;
+		return ret;
+	}
+
+	dev_dbg(cs35l56->base.dev, "Found '%s'\n", *filename);
+
+	return 0;
+}
+
+static const char cirrus_dir[] = "cirrus/";
+static void cs35l56_hda_request_firmware_files(struct cs35l56_hda *cs35l56,
+					       const struct firmware **wmfw_firmware,
+					       char **wmfw_filename,
+					       const struct firmware **coeff_firmware,
+					       char **coeff_filename)
+{
+	const char *system_name = cs35l56->system_name;
+	const char *amp_name = cs35l56->amp_name;
+	int ret;
+
+	if (system_name && amp_name) {
+		if (!cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
+						       cirrus_dir, system_name, amp_name, "wmfw")) {
+			cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
+							  cirrus_dir, system_name, amp_name, "bin");
+			return;
+		}
+	}
+
+	if (system_name) {
+		if (!cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
+						       cirrus_dir, system_name, NULL, "wmfw")) {
+			if (amp_name)
+				cs35l56_hda_request_firmware_file(cs35l56,
+								  coeff_firmware, coeff_filename,
+								  cirrus_dir, system_name,
+								  amp_name, "bin");
+			if (!*coeff_firmware)
+				cs35l56_hda_request_firmware_file(cs35l56,
+								  coeff_firmware, coeff_filename,
+								  cirrus_dir, system_name,
+								  NULL, "bin");
+			return;
+		}
+	}
+
+	ret = cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
+						cirrus_dir, NULL, NULL, "wmfw");
+	if (!ret) {
+		cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
+						  cirrus_dir, NULL, NULL, "bin");
+		return;
+	}
+
+	/* When a firmware file is not found must still search for the coeff files */
+	if (system_name) {
+		if (amp_name)
+			cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
+							  cirrus_dir, system_name, amp_name, "bin");
+		if (!*coeff_firmware)
+			cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
+							  cirrus_dir, system_name, NULL, "bin");
+	}
+
+	if (!*coeff_firmware)
+		cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
+						  cirrus_dir, NULL, NULL, "bin");
+}
+
+static void cs35l56_hda_release_firmware_files(const struct firmware *wmfw_firmware,
+					       char *wmfw_filename,
+					       const struct firmware *coeff_firmware,
+					       char *coeff_filename)
+{
+	if (wmfw_firmware)
+		release_firmware(wmfw_firmware);
+	kfree(wmfw_filename);
+
+	if (coeff_firmware)
+		release_firmware(coeff_firmware);
+	kfree(coeff_filename);
+}
+
+static void cs35l56_hda_add_dsp_controls(struct cs35l56_hda *cs35l56)
+{
+	struct hda_cs_dsp_ctl_info info;
+
+	info.device_name = cs35l56->amp_name;
+	info.fw_type = HDA_CS_DSP_FW_MISC;
+	info.card = cs35l56->codec->card;
+
+	hda_cs_dsp_add_controls(&cs35l56->cs_dsp, &info);
+}
+
+static int cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
+{
+	const struct firmware *coeff_firmware = NULL;
+	const struct firmware *wmfw_firmware = NULL;
+	char *coeff_filename = NULL;
+	char *wmfw_filename = NULL;
+	int ret = 0;
+
+	cs35l56_hda_request_firmware_files(cs35l56, &wmfw_firmware, &wmfw_filename,
+					   &coeff_firmware, &coeff_filename);
+
+	/* Nothing to do - no firmware files were found to download */
+	if (!wmfw_filename && !coeff_filename)
+		return 0;
+
+	mutex_lock(&cs35l56->base.irq_lock);
+	pm_runtime_get_sync(cs35l56->base.dev);
+
+	/*
+	 * When the device is running in secure mode the firmware files can
+	 * only contain insecure tunings and therefore we do not need to
+	 * shutdown the firmware to apply them and can use the lower cost
+	 * reinit sequence instead.
+	 */
+	if (!cs35l56->base.secured) {
+		ret = cs35l56_firmware_shutdown(&cs35l56->base);
+		if (ret)
+			goto err;
+	}
+
+	ret = cs_dsp_power_up(&cs35l56->cs_dsp, wmfw_firmware, wmfw_filename,
+			      coeff_firmware, coeff_filename, "misc");
+	if (ret) {
+		dev_dbg(cs35l56->base.dev, "%s: cs_dsp_power_up ret %d\n", __func__, ret);
+		goto err;
+	}
+
+	if (wmfw_filename)
+		dev_dbg(cs35l56->base.dev, "Loaded WMFW Firmware: %s\n", wmfw_filename);
+
+	if (coeff_filename)
+		dev_dbg(cs35l56->base.dev, "Loaded Coefficients: %s\n", coeff_filename);
+
+	ret = cs_dsp_run(&cs35l56->cs_dsp);
+	if (ret) {
+		dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
+		goto err;
+	}
+
+	if (cs35l56->base.secured) {
+		ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT);
+		if (ret)
+			goto err;
+	} else {
+		/* Reset the device and wait for it to boot */
+		cs35l56_system_reset(&cs35l56->base, false);
+		ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
+		if (ret)
+			goto err;
+	}
+
+	/* Disable auto-hibernate so that runtime_pm has control */
+	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
+	if (ret)
+		goto err;
+
+	regcache_mark_dirty(cs35l56->base.regmap);
+	regcache_sync(cs35l56->base.regmap);
+
+	regmap_clear_bits(cs35l56->base.regmap, CS35L56_PROTECTION_STATUS,
+			  CS35L56_FIRMWARE_MISSING);
+	cs35l56->base.fw_patched = true;
+err:
+	pm_runtime_put(cs35l56->base.dev);
+	mutex_unlock(&cs35l56->base.irq_lock);
+
+	cs35l56_hda_release_firmware_files(wmfw_firmware, wmfw_filename,
+					   coeff_firmware, coeff_filename);
+
+	return ret;
+}
+
+static int cs35l56_hda_bind(struct device *dev, struct device *master, void *master_data)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+	struct hda_component *comps = master_data;
+	int ret;
+
+	if (!comps || cs35l56->index < 0 || cs35l56->index >= HDA_MAX_COMPONENTS)
+		return -EINVAL;
+
+	comps = &comps[cs35l56->index];
+	if (comps->dev)
+		return -EBUSY;
+
+	comps->dev = dev;
+	cs35l56->codec = comps->codec;
+	strscpy(comps->name, dev_name(dev), sizeof(comps->name));
+	comps->playback_hook = cs35l56_hda_playback_hook;
+
+	ret = cs35l56_hda_fw_load(cs35l56);
+	if (ret)
+		return ret;
+
+	cs35l56_hda_create_controls(cs35l56);
+	cs35l56_hda_add_dsp_controls(cs35l56);
+
+#if IS_ENABLED(CONFIG_SND_DEBUG)
+	cs35l56->debugfs_root = debugfs_create_dir(dev_name(cs35l56->base.dev), sound_debugfs_root);
+	cs_dsp_init_debugfs(&cs35l56->cs_dsp, cs35l56->debugfs_root);
+#endif
+
+	dev_dbg(cs35l56->base.dev, "Bound\n");
+
+	return 0;
+}
+
+static void cs35l56_hda_unbind(struct device *dev, struct device *master, void *master_data)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+	struct hda_component *comps = master_data;
+
+	cs35l56_hda_remove_controls(cs35l56);
+
+#if IS_ENABLED(CONFIG_SND_DEBUG)
+	cs_dsp_cleanup_debugfs(&cs35l56->cs_dsp);
+	debugfs_remove_recursive(cs35l56->debugfs_root);
+#endif
+
+	cs_dsp_remove(&cs35l56->cs_dsp);
+
+	if (comps[cs35l56->index].dev == dev)
+		memset(&comps[cs35l56->index], 0, sizeof(*comps));
+
+	dev_dbg(cs35l56->base.dev, "Unbound\n");
+}
+
+static const struct component_ops cs35l56_hda_comp_ops = {
+	.bind = cs35l56_hda_bind,
+	.unbind = cs35l56_hda_unbind,
+};
+
+static int cs35l56_hda_system_suspend(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	if (cs35l56->playing)
+		cs35l56_hda_pause(cs35l56);
+
+	cs35l56->suspended = true;
+
+	/*
+	 * The interrupt line is normally shared, but after we start suspending
+	 * we can't check if our device is the source of an interrupt, and can't
+	 * clear it. Prevent this race by temporarily disabling the parent irq
+	 * until we reach _no_irq.
+	 */
+	if (cs35l56->base.irq)
+		disable_irq(cs35l56->base.irq);
+
+	return pm_runtime_force_suspend(dev);
+}
+
+static int cs35l56_hda_system_suspend_late(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	/*
+	 * RESET is usually shared by all amps so it must not be asserted until
+	 * all driver instances have done their suspend() stage.
+	 */
+	if (cs35l56->base.reset_gpio) {
+		gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
+		cs35l56_wait_min_reset_pulse();
+	}
+
+	return 0;
+}
+
+static int cs35l56_hda_system_suspend_no_irq(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	/* Handlers are now disabled so the parent IRQ can safely be re-enabled. */
+	if (cs35l56->base.irq)
+		enable_irq(cs35l56->base.irq);
+
+	return 0;
+}
+
+static int cs35l56_hda_system_resume_no_irq(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	/*
+	 * WAKE interrupts unmask if the CS35L56 hibernates, which can cause
+	 * spurious interrupts, and the interrupt line is normally shared.
+	 * We can't check if our device is the source of an interrupt, and can't
+	 * clear it, until it has fully resumed. Prevent this race by temporarily
+	 * disabling the parent irq until we complete resume().
+	 */
+	if (cs35l56->base.irq)
+		disable_irq(cs35l56->base.irq);
+
+	return 0;
+}
+
+static int cs35l56_hda_system_resume_early(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	/* Ensure a spec-compliant RESET pulse. */
+	if (cs35l56->base.reset_gpio) {
+		gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
+		cs35l56_wait_min_reset_pulse();
+
+		/* Release shared RESET before drivers start resume(). */
+		gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1);
+		cs35l56_wait_control_port_ready();
+	}
+
+	return 0;
+}
+
+static int cs35l56_hda_system_resume(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+	int ret;
+
+	/* Undo pm_runtime_force_suspend() before re-enabling the irq */
+	ret = pm_runtime_force_resume(dev);
+	if (cs35l56->base.irq)
+		enable_irq(cs35l56->base.irq);
+
+	if (ret)
+		return ret;
+
+	cs35l56->suspended = false;
+
+	ret = cs35l56_is_fw_reload_needed(&cs35l56->base);
+	dev_dbg(cs35l56->base.dev, "fw_reload_needed: %d\n", ret);
+	if (ret > 0) {
+		ret = cs35l56_hda_fw_load(cs35l56);
+		if (ret)
+			return ret;
+	}
+
+	if (cs35l56->playing)
+		cs35l56_hda_play(cs35l56);
+
+	return 0;
+}
+
+static int cs35l56_hda_read_acpi(struct cs35l56_hda *cs35l56, int id)
+{
+	u32 values[HDA_MAX_COMPONENTS];
+	struct acpi_device *adev;
+	const char *property, *sub;
+	size_t nval;
+	int i, ret;
+
+	/*
+	 * ACPI_COMPANION isn't available when this driver was instantiated by
+	 * the serial-multi-instantiate driver, so lookup the node by HID
+	 */
+	if (!ACPI_COMPANION(cs35l56->base.dev)) {
+		adev = acpi_dev_get_first_match_dev("CSC3556", NULL, -1);
+		if (!adev) {
+			dev_err(cs35l56->base.dev, "Failed to find an ACPI device for %s\n",
+				dev_name(cs35l56->base.dev));
+			return -ENODEV;
+		}
+		ACPI_COMPANION_SET(cs35l56->base.dev, adev);
+	}
+
+	property = "cirrus,dev-index";
+	ret = device_property_count_u32(cs35l56->base.dev, property);
+	if (ret <= 0)
+		goto err;
+
+	if (ret > ARRAY_SIZE(values)) {
+		ret = -EINVAL;
+		goto err;
+	}
+	nval = ret;
+
+	ret = device_property_read_u32_array(cs35l56->base.dev, property, values, nval);
+	if (ret)
+		goto err;
+
+	cs35l56->index = -1;
+	for (i = 0; i < nval; i++) {
+		if (values[i] == id) {
+			cs35l56->index = i;
+			break;
+		}
+	}
+	if (cs35l56->index == -1) {
+		dev_err(cs35l56->base.dev, "No index found in %s\n", property);
+		ret = -ENODEV;
+		goto err;
+	}
+
+	sub = acpi_get_subsystem_id(ACPI_HANDLE(cs35l56->base.dev));
+
+	if (IS_ERR(sub)) {
+		/* If no ACPI SUB, return 0 and fallback to legacy firmware path, otherwise fail */
+		if (PTR_ERR(sub) == -ENODATA)
+			return 0;
+		else
+			return PTR_ERR(sub);
+	}
+
+	cs35l56->system_name = sub;
+
+	cs35l56->base.reset_gpio = devm_gpiod_get_index_optional(cs35l56->base.dev,
+								 "reset",
+								 cs35l56->index,
+								 GPIOD_OUT_LOW);
+	if (IS_ERR(cs35l56->base.reset_gpio)) {
+		ret = PTR_ERR(cs35l56->base.reset_gpio);
+
+		/*
+		 * If RESET is shared the first amp to probe will grab the reset
+		 * line and reset all the amps
+		 */
+		if (ret != -EBUSY)
+			return dev_err_probe(cs35l56->base.dev, ret, "Failed to get reset GPIO\n");
+
+		dev_info(cs35l56->base.dev, "Reset GPIO busy, assume shared reset\n");
+		cs35l56->base.reset_gpio = NULL;
+	}
+
+	return 0;
+
+err:
+	dev_err(cs35l56->base.dev, "Failed property %s: %d\n", property, ret);
+
+	return ret;
+}
+
+int cs35l56_hda_common_probe(struct cs35l56_hda *cs35l56, int id)
+{
+	int ret;
+
+	mutex_init(&cs35l56->base.irq_lock);
+	dev_set_drvdata(cs35l56->base.dev, cs35l56);
+
+	ret = cs35l56_hda_read_acpi(cs35l56, id);
+	if (ret) {
+		dev_err_probe(cs35l56->base.dev, ret, "Platform not supported\n");
+		goto err;
+	}
+
+	cs35l56->amp_name = devm_kasprintf(cs35l56->base.dev, GFP_KERNEL, "AMP%d",
+					   cs35l56->index + 1);
+	if (!cs35l56->amp_name) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	cs35l56_init_cs_dsp(&cs35l56->base, &cs35l56->cs_dsp);
+	cs35l56->cs_dsp.client_ops = &cs35l56_hda_client_ops;
+
+	if (cs35l56->base.reset_gpio) {
+		dev_dbg(cs35l56->base.dev, "Hard reset\n");
+
+		/*
+		 * The GPIOD_OUT_LOW to *_gpiod_get_*() will be ignored if the
+		 * ACPI defines a different default state. So explicitly set low.
+		 */
+		gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
+		cs35l56_wait_min_reset_pulse();
+		gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1);
+	}
+
+	ret = cs35l56_hw_init(&cs35l56->base);
+	if (ret < 0)
+		goto err;
+
+	/* Reset the device and wait for it to boot */
+	cs35l56_system_reset(&cs35l56->base, false);
+	ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
+	if (ret)
+		goto err;
+
+	ret = cs35l56_set_patch(&cs35l56->base);
+	if (ret)
+		return ret;
+
+	regcache_mark_dirty(cs35l56->base.regmap);
+	regcache_sync(cs35l56->base.regmap);
+
+	/* Disable auto-hibernate so that runtime_pm has control */
+	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
+	if (ret)
+		goto err;
+
+	ret = cs_dsp_halo_init(&cs35l56->cs_dsp);
+	if (ret) {
+		dev_err_probe(cs35l56->base.dev, ret, "cs_dsp_halo_init failed\n");
+		goto err;
+	}
+
+	dev_dbg(cs35l56->base.dev, "DSP system name: '%s', amp name: '%s'\n",
+		cs35l56->system_name, cs35l56->amp_name);
+
+	regmap_multi_reg_write(cs35l56->base.regmap, cs35l56_hda_dai_config,
+			       ARRAY_SIZE(cs35l56_hda_dai_config));
+
+	/*
+	 * By default only enable one ASP1TXn, where n=amplifier index,
+	 * This prevents multiple amps trying to drive the same slot.
+	 */
+	cs35l56->asp_tx_mask = BIT(cs35l56->index);
+
+	pm_runtime_set_autosuspend_delay(cs35l56->base.dev, 3000);
+	pm_runtime_use_autosuspend(cs35l56->base.dev);
+	pm_runtime_set_active(cs35l56->base.dev);
+	pm_runtime_mark_last_busy(cs35l56->base.dev);
+	pm_runtime_enable(cs35l56->base.dev);
+
+	ret = component_add(cs35l56->base.dev, &cs35l56_hda_comp_ops);
+	if (ret) {
+		dev_err(cs35l56->base.dev, "Register component failed: %d\n", ret);
+		goto pm_err;
+	}
+
+	cs35l56->base.init_done = true;
+
+	return 0;
+
+pm_err:
+	pm_runtime_disable(cs35l56->base.dev);
+err:
+	gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_hda_common_probe, SND_HDA_SCODEC_CS35L56);
+
+void cs35l56_hda_remove(struct device *dev)
+{
+	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
+
+	pm_runtime_get_sync(cs35l56->base.dev);
+	pm_runtime_disable(cs35l56->base.dev);
+
+	component_del(cs35l56->base.dev, &cs35l56_hda_comp_ops);
+
+	kfree(cs35l56->system_name);
+	pm_runtime_put_noidle(cs35l56->base.dev);
+
+	gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_hda_remove, SND_HDA_SCODEC_CS35L56);
+
+const struct dev_pm_ops cs35l56_hda_pm_ops = {
+	SET_RUNTIME_PM_OPS(cs35l56_hda_runtime_suspend, cs35l56_hda_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend, cs35l56_hda_system_resume)
+	LATE_SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend_late,
+				 cs35l56_hda_system_resume_early)
+	NOIRQ_SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend_no_irq,
+				  cs35l56_hda_system_resume_no_irq)
+};
+EXPORT_SYMBOL_NS_GPL(cs35l56_hda_pm_ops, SND_HDA_SCODEC_CS35L56);
+
+MODULE_DESCRIPTION("CS35L56 HDA Driver");
+MODULE_IMPORT_NS(SND_HDA_CS_DSP_CONTROLS);
+MODULE_IMPORT_NS(SND_SOC_CS35L56_SHARED);
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(FW_CS_DSP);
diff --git a/sound/pci/hda/cs35l56_hda.h b/sound/pci/hda/cs35l56_hda.h
new file mode 100644
index 000000000000..6e5bc5397db5
--- /dev/null
+++ b/sound/pci/hda/cs35l56_hda.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * HDA audio driver for Cirrus Logic CS35L56 smart amp
+ *
+ * Copyright (C) 2023 Cirrus Logic, Inc. and
+ *                    Cirrus Logic International Semiconductor Ltd.
+ */
+
+#ifndef __CS35L56_HDA_H__
+#define __CS35L56_HDA_H__
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/firmware/cirrus/cs_dsp.h>
+#include <linux/firmware/cirrus/wmfw.h>
+#include <linux/regulator/consumer.h>
+#include <sound/cs35l56.h>
+
+struct dentry;
+
+struct cs35l56_hda {
+	struct cs35l56_base base;
+	struct hda_codec *codec;
+
+	int index;
+	const char *system_name;
+	const char *amp_name;
+
+	struct cs_dsp cs_dsp;
+	bool playing;
+	bool suspended;
+	u8 asp_tx_mask;
+
+	struct snd_kcontrol *posture_ctl;
+	struct snd_kcontrol *volume_ctl;
+	struct snd_kcontrol *mixer_ctl[4];
+
+#if IS_ENABLED(CONFIG_SND_DEBUG)
+	struct dentry *debugfs_root;
+#endif
+};
+
+extern const struct dev_pm_ops cs35l56_hda_pm_ops;
+
+int cs35l56_hda_common_probe(struct cs35l56_hda *cs35l56, int id);
+void cs35l56_hda_remove(struct device *dev);
+
+#endif /*__CS35L56_HDA_H__*/
diff --git a/sound/pci/hda/cs35l56_hda_i2c.c b/sound/pci/hda/cs35l56_hda_i2c.c
new file mode 100644
index 000000000000..83e4acdd89ac
--- /dev/null
+++ b/sound/pci/hda/cs35l56_hda_i2c.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// CS35L56 HDA audio driver I2C binding
+//
+// Copyright (C) 2023 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "cs35l56_hda.h"
+
+static int cs35l56_hda_i2c_probe(struct i2c_client *clt)
+{
+	struct cs35l56_hda *cs35l56;
+	int ret;
+
+	cs35l56 = devm_kzalloc(&clt->dev, sizeof(*cs35l56), GFP_KERNEL);
+	if (!cs35l56)
+		return -ENOMEM;
+
+	cs35l56->base.dev = &clt->dev;
+	cs35l56->base.can_hibernate = true;
+	cs35l56->base.regmap = devm_regmap_init_i2c(clt, &cs35l56_regmap_i2c);
+	if (IS_ERR(cs35l56->base.regmap)) {
+		ret = PTR_ERR(cs35l56->base.regmap);
+		dev_err(cs35l56->base.dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = cs35l56_hda_common_probe(cs35l56, clt->addr);
+	if (ret)
+		return ret;
+	ret = cs35l56_irq_request(&cs35l56->base, clt->irq);
+	if (ret < 0)
+		cs35l56_hda_remove(cs35l56->base.dev);
+
+	return ret;
+}
+
+static void cs35l56_hda_i2c_remove(struct i2c_client *clt)
+{
+	cs35l56_hda_remove(&clt->dev);
+}
+
+static const struct i2c_device_id cs35l56_hda_i2c_id[] = {
+	{ "cs35l56-hda", 0 },
+	{}
+};
+
+static struct i2c_driver cs35l56_hda_i2c_driver = {
+	.driver = {
+		.name		= "cs35l56-hda",
+		.pm		= &cs35l56_hda_pm_ops,
+	},
+	.id_table	= cs35l56_hda_i2c_id,
+	.probe		= cs35l56_hda_i2c_probe,
+	.remove		= cs35l56_hda_i2c_remove,
+};
+module_i2c_driver(cs35l56_hda_i2c_driver);
+
+MODULE_DESCRIPTION("HDA CS35L56 I2C driver");
+MODULE_IMPORT_NS(SND_HDA_SCODEC_CS35L56);
+MODULE_IMPORT_NS(SND_SOC_CS35L56_SHARED);
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/pci/hda/cs35l56_hda_spi.c b/sound/pci/hda/cs35l56_hda_spi.c
new file mode 100644
index 000000000000..756aec342eab
--- /dev/null
+++ b/sound/pci/hda/cs35l56_hda_spi.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// CS35L56 HDA audio driver SPI binding
+//
+// Copyright (C) 2023 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "cs35l56_hda.h"
+
+static int cs35l56_hda_spi_probe(struct spi_device *spi)
+{
+	struct cs35l56_hda *cs35l56;
+	int ret;
+
+	cs35l56 = devm_kzalloc(&spi->dev, sizeof(*cs35l56), GFP_KERNEL);
+	if (!cs35l56)
+		return -ENOMEM;
+
+	cs35l56->base.dev = &spi->dev;
+	cs35l56->base.regmap = devm_regmap_init_spi(spi, &cs35l56_regmap_spi);
+	if (IS_ERR(cs35l56->base.regmap)) {
+		ret = PTR_ERR(cs35l56->base.regmap);
+		dev_err(cs35l56->base.dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = cs35l56_hda_common_probe(cs35l56, spi->chip_select);
+	if (ret)
+		return ret;
+	ret = cs35l56_irq_request(&cs35l56->base, spi->irq);
+	if (ret < 0)
+		cs35l56_hda_remove(cs35l56->base.dev);
+
+	return ret;
+}
+
+static void cs35l56_hda_spi_remove(struct spi_device *spi)
+{
+	cs35l56_hda_remove(&spi->dev);
+}
+
+static const struct spi_device_id cs35l56_hda_spi_id[] = {
+	{ "cs35l56-hda", 0 },
+	{}
+};
+
+static struct spi_driver cs35l56_hda_spi_driver = {
+	.driver = {
+		.name		= "cs35l56-hda",
+		.pm		= &cs35l56_hda_pm_ops,
+	},
+	.id_table	= cs35l56_hda_spi_id,
+	.probe		= cs35l56_hda_spi_probe,
+	.remove		= cs35l56_hda_spi_remove,
+};
+module_spi_driver(cs35l56_hda_spi_driver);
+
+MODULE_DESCRIPTION("HDA CS35L56 SPI driver");
+MODULE_IMPORT_NS(SND_HDA_SCODEC_CS35L56);
+MODULE_IMPORT_NS(SND_SOC_CS35L56_SHARED);
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");