ASoC: cs35l56: Add driver for Cirrus Logic CS35L56

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.

Supported control interfaces are I2C, SPI or SoundWire.
Supported audio interfaces are I2S/TDM or SoundWire.

Most chip functionality is controlled by on-board ROM firmware that is
always running. The driver must apply patch/tune to the firmware
before using the CS35L56.
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230320112245.115720-9-rf@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -4905,6 +4905,7 @@ L:	patches@opensource.cirrus.com
 S:	Maintained
 F:	Documentation/devicetree/bindings/sound/cirrus,cs*
 F:	include/dt-bindings/sound/cs*
+F:	include/sound/cs*
 F:	sound/pci/hda/cs*
 F:	sound/pci/hda/hda_cs_dsp_ctl.*
 F:	sound/soc/codecs/cs*

include/sound/cs35l56.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Common definitions for Cirrus Logic CS35L56 smart amp
+ *
+ * Copyright (C) 2023 Cirrus Logic, Inc. and
+ *                    Cirrus Logic International Semiconductor Ltd.
+ */
+
+#ifndef __CS35L56_H
+#define __CS35L56_H
+
+#include <linux/firmware/cirrus/cs_dsp.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+
+#define CS35L56_DEVID					0x0000000
+#define CS35L56_REVID					0x0000004
+#define CS35L56_RELID					0x000000C
+#define CS35L56_OTPID					0x0000010
+#define CS35L56_SFT_RESET				0x0000020
+#define CS35L56_GLOBAL_ENABLES				0x0002014
+#define CS35L56_BLOCK_ENABLES				0x0002018
+#define CS35L56_BLOCK_ENABLES2				0x000201C
+#define CS35L56_REFCLK_INPUT				0x0002C04
+#define CS35L56_GLOBAL_SAMPLE_RATE			0x0002C0C
+#define CS35L56_ASP1_ENABLES1				0x0004800
+#define CS35L56_ASP1_CONTROL1				0x0004804
+#define CS35L56_ASP1_CONTROL2				0x0004808
+#define CS35L56_ASP1_CONTROL3				0x000480C
+#define CS35L56_ASP1_FRAME_CONTROL1			0x0004810
+#define CS35L56_ASP1_FRAME_CONTROL5			0x0004820
+#define CS35L56_ASP1_DATA_CONTROL1			0x0004830
+#define CS35L56_ASP1_DATA_CONTROL5			0x0004840
+#define CS35L56_DACPCM1_INPUT				0x0004C00
+#define CS35L56_DACPCM2_INPUT				0x0004C08
+#define CS35L56_ASP1TX1_INPUT				0x0004C20
+#define CS35L56_ASP1TX2_INPUT				0x0004C24
+#define CS35L56_ASP1TX3_INPUT				0x0004C28
+#define CS35L56_ASP1TX4_INPUT				0x0004C2C
+#define CS35L56_DSP1RX1_INPUT				0x0004C40
+#define CS35L56_DSP1RX2_INPUT				0x0004C44
+#define CS35L56_SWIRE_DP3_CH1_INPUT			0x0004C70
+#define CS35L56_SWIRE_DP3_CH2_INPUT			0x0004C74
+#define CS35L56_SWIRE_DP3_CH3_INPUT			0x0004C78
+#define CS35L56_SWIRE_DP3_CH4_INPUT			0x0004C7C
+#define CS35L56_SWIRE_DP3_CH5_INPUT			0x0004C80
+#define CS35L56_SWIRE_DP3_CH6_INPUT			0x0004C84
+#define CS35L56_IRQ1_CFG				0x000E000
+#define CS35L56_IRQ1_STATUS				0x000E004
+#define CS35L56_IRQ1_EINT_1				0x000E010
+#define CS35L56_IRQ1_EINT_2				0x000E014
+#define CS35L56_IRQ1_EINT_4				0x000E01C
+#define CS35L56_IRQ1_EINT_8				0x000E02C
+#define CS35L56_IRQ1_EINT_18				0x000E054
+#define CS35L56_IRQ1_EINT_20				0x000E05C
+#define CS35L56_IRQ1_MASK_1				0x000E090
+#define CS35L56_IRQ1_MASK_2				0x000E094
+#define CS35L56_IRQ1_MASK_4				0x000E09C
+#define CS35L56_IRQ1_MASK_8				0x000E0AC
+#define CS35L56_IRQ1_MASK_18				0x000E0D4
+#define CS35L56_IRQ1_MASK_20				0x000E0DC
+#define CS35L56_DSP_VIRTUAL1_MBOX_1			0x0011020
+#define CS35L56_DSP_VIRTUAL1_MBOX_2			0x0011024
+#define CS35L56_DSP_VIRTUAL1_MBOX_3			0x0011028
+#define CS35L56_DSP_VIRTUAL1_MBOX_4			0x001102C
+#define CS35L56_DSP_VIRTUAL1_MBOX_5			0x0011030
+#define CS35L56_DSP_VIRTUAL1_MBOX_6			0x0011034
+#define CS35L56_DSP_VIRTUAL1_MBOX_7			0x0011038
+#define CS35L56_DSP_VIRTUAL1_MBOX_8			0x001103C
+#define CS35L56_DSP_RESTRICT_STS1			0x00190F0
+#define CS35L56_DSP1_XMEM_PACKED_0			0x2000000
+#define CS35L56_DSP1_XMEM_PACKED_6143			0x2005FFC
+#define CS35L56_DSP1_XMEM_UNPACKED32_0			0x2400000
+#define CS35L56_DSP1_XMEM_UNPACKED32_4095		0x2403FFC
+#define CS35L56_DSP1_SYS_INFO_ID			0x25E0000
+#define CS35L56_DSP1_SYS_INFO_END			0x25E004C
+#define CS35L56_DSP1_AHBM_WINDOW_DEBUG_0		0x25E2040
+#define CS35L56_DSP1_AHBM_WINDOW_DEBUG_1		0x25E2044
+#define CS35L56_DSP1_XMEM_UNPACKED24_0			0x2800000
+#define CS35L56_DSP1_HALO_STATE_A1			0x2801E58
+#define CS35L56_DSP1_HALO_STATE				0x28021E0
+#define CS35L56_DSP1_PM_CUR_STATE_A1			0x2804000
+#define CS35L56_DSP1_PM_CUR_STATE			0x2804308
+#define CS35L56_DSP1_XMEM_UNPACKED24_8191		0x2807FFC
+#define CS35L56_DSP1_CORE_BASE				0x2B80000
+#define CS35L56_DSP1_SCRATCH1				0x2B805C0
+#define CS35L56_DSP1_SCRATCH2				0x2B805C8
+#define CS35L56_DSP1_SCRATCH3				0x2B805D0
+#define CS35L56_DSP1_SCRATCH4				0x2B805D8
+#define CS35L56_DSP1_YMEM_PACKED_0			0x2C00000
+#define CS35L56_DSP1_YMEM_PACKED_4604			0x2C047F0
+#define CS35L56_DSP1_YMEM_UNPACKED32_0			0x3000000
+#define CS35L56_DSP1_YMEM_UNPACKED32_3070		0x3002FF8
+#define CS35L56_DSP1_YMEM_UNPACKED24_0			0x3400000
+#define CS35L56_MAIN_RENDER_USER_MUTE			0x3400024
+#define CS35L56_MAIN_RENDER_USER_VOLUME			0x340002C
+#define CS35L56_MAIN_POSTURE_NUMBER			0x3400094
+#define CS35L56_TRANSDUCER_ACTUAL_PS			0x3400150
+#define CS35L56_DSP1_YMEM_UNPACKED24_6141		0x3405FF4
+#define CS35L56_DSP1_PMEM_0				0x3800000
+#define CS35L56_DSP1_PMEM_5114				0x3804FE8
+
+/* DEVID */
+#define CS35L56_DEVID_MASK				0x00FFFFFF
+
+/* REVID */
+#define CS35L56_AREVID_MASK				0x000000F0
+#define CS35L56_MTLREVID_MASK				0x0000000F
+#define CS35L56_REVID_B0				0x000000B0
+
+/* ASP_ENABLES1 */
+#define CS35L56_ASP_RX2_EN_SHIFT			17
+#define CS35L56_ASP_RX1_EN_SHIFT			16
+#define CS35L56_ASP_TX4_EN_SHIFT			3
+#define CS35L56_ASP_TX3_EN_SHIFT			2
+#define CS35L56_ASP_TX2_EN_SHIFT			1
+#define CS35L56_ASP_TX1_EN_SHIFT			0
+
+/* ASP_CONTROL1 */
+#define CS35L56_ASP_BCLK_FREQ_MASK			0x0000003F
+#define CS35L56_ASP_BCLK_FREQ_SHIFT			0
+
+/* ASP_CONTROL2 */
+#define CS35L56_ASP_RX_WIDTH_MASK			0xFF000000
+#define CS35L56_ASP_RX_WIDTH_SHIFT			24
+#define CS35L56_ASP_TX_WIDTH_MASK			0x00FF0000
+#define CS35L56_ASP_TX_WIDTH_SHIFT			16
+#define CS35L56_ASP_FMT_MASK				0x00000700
+#define CS35L56_ASP_FMT_SHIFT				8
+#define CS35L56_ASP_BCLK_INV_MASK			0x00000040
+#define CS35L56_ASP_FSYNC_INV_MASK			0x00000004
+
+/* ASP_CONTROL3 */
+#define CS35L56_ASP1_DOUT_HIZ_CTRL_MASK			0x00000003
+
+/* ASP_DATA_CONTROL1 */
+#define CS35L56_ASP_TX_WL_MASK				0x0000003F
+
+/* ASP_DATA_CONTROL5 */
+#define CS35L56_ASP_RX_WL_MASK				0x0000003F
+
+/* ASPTXn_INPUT */
+#define CS35L56_ASP_TXn_SRC_MASK			0x0000007F
+
+/* SWIRETX[1..7]_SRC SDWTXn INPUT */
+#define CS35L56_SWIRETXn_SRC_MASK			0x0000007F
+
+/* IRQ1_STATUS */
+#define CS35L56_IRQ1_STS_MASK				0x00000001
+
+/* IRQ1_EINT_1 */
+#define CS35L56_AMP_SHORT_ERR_EINT1_MASK		0x80000000
+
+/* IRQ1_EINT_2 */
+#define CS35L56_DSP_VIRTUAL2_MBOX_WR_EINT1_MASK		0x00200000
+
+/* IRQ1_EINT_4 */
+#define CS35L56_OTP_BOOT_DONE_MASK			0x00000002
+
+/* IRQ1_EINT_8 */
+#define CS35L56_TEMP_ERR_EINT1_MASK			0x80000000
+
+/* Mixer input sources */
+#define CS35L56_INPUT_SRC_NONE				0x00
+#define CS35L56_INPUT_SRC_ASP1RX1			0x08
+#define CS35L56_INPUT_SRC_ASP1RX2			0x09
+#define CS35L56_INPUT_SRC_VMON				0x18
+#define CS35L56_INPUT_SRC_IMON				0x19
+#define CS35L56_INPUT_SRC_ERR_VOL			0x20
+#define CS35L56_INPUT_SRC_CLASSH			0x21
+#define CS35L56_INPUT_SRC_VDDBMON			0x28
+#define CS35L56_INPUT_SRC_VBSTMON			0x29
+#define CS35L56_INPUT_SRC_DSP1TX1			0x32
+#define CS35L56_INPUT_SRC_DSP1TX2			0x33
+#define CS35L56_INPUT_SRC_DSP1TX3			0x34
+#define CS35L56_INPUT_SRC_DSP1TX4			0x35
+#define CS35L56_INPUT_SRC_DSP1TX5			0x36
+#define CS35L56_INPUT_SRC_DSP1TX6			0x37
+#define CS35L56_INPUT_SRC_DSP1TX7			0x38
+#define CS35L56_INPUT_SRC_DSP1TX8			0x39
+#define CS35L56_INPUT_SRC_TEMPMON			0x3A
+#define CS35L56_INPUT_SRC_INTERPOLATOR			0x40
+#define CS35L56_INPUT_SRC_SWIRE_RX1			0x44
+#define CS35L56_INPUT_SRC_SWIRE_RX2			0x45
+#define CS35L56_INPUT_SRC_SWIRE_RX3			0x46
+#define CS35L56_INPUT_MASK				0x7F
+
+#define CS35L56_NUM_INPUT_SRC				22
+
+/* ASP formats */
+#define CS35L56_ASP_FMT_DSP_A				0
+#define CS35L56_ASP_FMT_I2S				2
+
+/* ASP HiZ modes */
+#define CS35L56_ASP_UNUSED_HIZ_OFF_HIZ			3
+
+/* MAIN_RENDER_ACTUAL_PS */
+#define CS35L56_PS0					0
+#define CS35L56_PS3					3
+
+/* CS35L56_DSP_RESTRICT_STS1 */
+#define CS35L56_RESTRICTED_MASK				0x7
+
+/* CS35L56_MAIN_RENDER_USER_MUTE */
+#define CS35L56_MAIN_RENDER_USER_MUTE_MASK		1
+
+/* CS35L56_MAIN_RENDER_USER_VOLUME */
+#define CS35L56_MAIN_RENDER_USER_VOLUME_MIN		-400
+#define CS35L56_MAIN_RENDER_USER_VOLUME_MAX		400
+#define CS35L56_MAIN_RENDER_USER_VOLUME_MASK		0x0000FFC0
+#define CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT		6
+#define CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT		9
+
+/* CS35L56_MAIN_POSTURE_NUMBER */
+#define CS35L56_MAIN_POSTURE_MIN			0
+#define CS35L56_MAIN_POSTURE_MAX			255
+#define CS35L56_MAIN_POSTURE_MASK			CS35L56_MAIN_POSTURE_MAX
+
+/* Software Values */
+#define CS35L56_HALO_STATE_SHUTDOWN			1
+#define CS35L56_HALO_STATE_BOOT_DONE			2
+
+#define CS35L56_MBOX_CMD_AUDIO_PLAY			0x0B000001
+#define CS35L56_MBOX_CMD_AUDIO_PAUSE			0x0B000002
+#define CS35L56_MBOX_CMD_HIBERNATE_NOW			0x02000001
+#define CS35L56_MBOX_CMD_WAKEUP				0x02000002
+#define CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE		0x02000003
+#define CS35L56_MBOX_CMD_ALLOW_AUTO_HIBERNATE		0x02000004
+#define CS35L56_MBOX_CMD_SHUTDOWN			0x02000005
+#define CS35L56_MBOX_CMD_SYSTEM_RESET			0x02000007
+
+#define CS35L56_MBOX_TIMEOUT_US				5000
+#define CS35L56_MBOX_POLL_US				250
+
+#define CS35L56_PS0_POLL_US				500
+#define CS35L56_PS0_TIMEOUT_US				50000
+#define CS35L56_PS3_POLL_US				500
+#define CS35L56_PS3_TIMEOUT_US				300000
+
+#define CS35L56_CONTROL_PORT_READY_US			2200
+#define CS35L56_HALO_STATE_POLL_US			1000
+#define CS35L56_HALO_STATE_TIMEOUT_US			50000
+#define CS35L56_HIBERNATE_WAKE_POLL_US			500
+#define CS35L56_HIBERNATE_WAKE_TIMEOUT_US		5000
+#define CS35L56_RESET_PULSE_MIN_US			1100
+
+#define CS35L56_SDW1_PLAYBACK_PORT			1
+#define CS35L56_SDW1_CAPTURE_PORT			3
+
+#define CS35L56_NUM_BULK_SUPPLIES			3
+#define CS35L56_NUM_DSP_REGIONS				5
+
+extern struct regmap_config cs35l56_regmap_i2c;
+extern struct regmap_config cs35l56_regmap_spi;
+extern struct regmap_config cs35l56_regmap_sdw;
+
+extern const struct cs_dsp_region cs35l56_dsp1_regions[CS35L56_NUM_DSP_REGIONS];
+extern const char * const cs35l56_tx_input_texts[CS35L56_NUM_INPUT_SRC];
+extern const unsigned int cs35l56_tx_input_values[CS35L56_NUM_INPUT_SRC];
+
+void cs35l56_patch(struct device *dev, struct regmap *regmap, u8 revid);
+void cs35l56_reread_firmware_registers(struct device *dev, struct regmap *regmap);
+int cs35l56_get_bclk_freq_id(unsigned int freq);
+void cs35l56_fill_supply_names(struct regulator_bulk_data *data);
+
+#endif /* ifndef __CS35L56_H */

sound/soc/codecs/Kconfig

@@ -68,6 +68,9 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_CS35L41_I2C
 	imply SND_SOC_CS35L45_I2C
 	imply SND_SOC_CS35L45_SPI
+	imply SND_SOC_CS35L56_I2C
+	imply SND_SOC_CS35L56_SPI
+	imply SND_SOC_CS35L56_SDW
 	imply SND_SOC_CS42L42
 	imply SND_SOC_CS42L42_SDW
 	imply SND_SOC_CS42L51_I2C
@@ -364,6 +367,7 @@ config SND_SOC_WM_ADSP
 	default y if SND_SOC_WM2200=y
 	default y if SND_SOC_CS35L41_SPI=y
 	default y if SND_SOC_CS35L41_I2C=y
+	default y if SND_SOC_CS35L56=y
 	default m if SND_SOC_MADERA=m
 	default m if SND_SOC_CS47L24=m
 	default m if SND_SOC_WM5102=m
@@ -371,6 +375,7 @@ config SND_SOC_WM_ADSP
 	default m if SND_SOC_WM2200=m
 	default m if SND_SOC_CS35L41_SPI=m
 	default m if SND_SOC_CS35L41_I2C=m
+	default m if SND_SOC_CS35L56=m
 
 config SND_SOC_AB8500_CODEC
 	tristate
@@ -711,6 +716,41 @@ config SND_SOC_CS35L45_I2C
 	  Enable support for Cirrus Logic CS35L45 smart speaker amplifier
 	  with I2C control.
 
+config SND_SOC_CS35L56
+	tristate
+
+config SND_SOC_CS35L56_SHARED
+	tristate
+
+config SND_SOC_CS35L56_I2C
+	tristate "Cirrus Logic CS35L56 CODEC (I2C)"
+	depends on I2C
+	depends on SOUNDWIRE || !SOUNDWIRE
+	select REGMAP_I2C
+	select SND_SOC_CS35L56
+	select SND_SOC_CS35L56_SHARED
+	help
+	  Enable support for Cirrus Logic CS35L56 boosted amplifier with I2C control
+
+config SND_SOC_CS35L56_SPI
+	tristate "Cirrus Logic CS35L56 CODEC (SPI)"
+	depends on SPI_MASTER
+	depends on SOUNDWIRE || !SOUNDWIRE
+	select REGMAP_SPI
+	select SND_SOC_CS35L56
+	select SND_SOC_CS35L56_SHARED
+	help
+	  Enable support for Cirrus Logic CS35L56 boosted amplifier with SPI control
+
+config SND_SOC_CS35L56_SDW
+	tristate "Cirrus Logic CS35L56 CODEC (SDW)"
+	depends on SOUNDWIRE
+	select REGMAP
+	select SND_SOC_CS35L56
+	select SND_SOC_CS35L56_SHARED
+	help
+	  Enable support for Cirrus Logic CS35L56 boosted amplifier with SoundWire control
+
 config SND_SOC_CS42L42_CORE
 	tristate
 

sound/soc/codecs/Makefile

@@ -66,6 +66,11 @@ snd-soc-cs35l41-i2c-objs := cs35l41-i2c.o
 snd-soc-cs35l45-objs := cs35l45.o cs35l45-tables.o
 snd-soc-cs35l45-spi-objs := cs35l45-spi.o
 snd-soc-cs35l45-i2c-objs := cs35l45-i2c.o
+snd-soc-cs35l56-objs := cs35l56.o
+snd-soc-cs35l56-shared-objs := cs35l56-shared.o
+snd-soc-cs35l56-i2c-objs := cs35l56-i2c.o
+snd-soc-cs35l56-spi-objs := cs35l56-spi.o
+snd-soc-cs35l56-sdw-objs := cs35l56-sdw.o
 snd-soc-cs42l42-objs := cs42l42.o
 snd-soc-cs42l42-i2c-objs := cs42l42-i2c.o
 snd-soc-cs42l42-sdw-objs := cs42l42-sdw.o
@@ -433,6 +438,11 @@ obj-$(CONFIG_SND_SOC_CS35L41_I2C)	+= snd-soc-cs35l41-i2c.o
 obj-$(CONFIG_SND_SOC_CS35L45)	+= snd-soc-cs35l45.o
 obj-$(CONFIG_SND_SOC_CS35L45_SPI)	+= snd-soc-cs35l45-spi.o
 obj-$(CONFIG_SND_SOC_CS35L45_I2C)	+= snd-soc-cs35l45-i2c.o
+obj-$(CONFIG_SND_SOC_CS35L56)	+= snd-soc-cs35l56.o
+obj-$(CONFIG_SND_SOC_CS35L56_SHARED)	+= snd-soc-cs35l56-shared.o
+obj-$(CONFIG_SND_SOC_CS35L56_I2C)	+= snd-soc-cs35l56-i2c.o
+obj-$(CONFIG_SND_SOC_CS35L56_SPI)	+= snd-soc-cs35l56-spi.o
+obj-$(CONFIG_SND_SOC_CS35L56_SDW)	+= snd-soc-cs35l56-sdw.o
 obj-$(CONFIG_SND_SOC_CS42L42_CORE)	+= snd-soc-cs42l42.o
 obj-$(CONFIG_SND_SOC_CS42L42)	+= snd-soc-cs42l42-i2c.o
 obj-$(CONFIG_SND_SOC_CS42L42_SDW)	+= snd-soc-cs42l42-sdw.o

sound/soc/codecs/cs35l56-i2c.c

+// SPDX-License-Identifier: GPL-2.0-only
+//
+// CS35L56 ALSA SoC audio driver I2C binding
+//
+// Copyright (C) 2023 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "cs35l56.h"
+
+static int cs35l56_i2c_probe(struct i2c_client *client)
+{
+	struct cs35l56_private *cs35l56;
+	struct device *dev = &client->dev;
+	const struct regmap_config *regmap_config = &cs35l56_regmap_i2c;
+	int ret;
+
+	cs35l56 = devm_kzalloc(dev, sizeof(struct cs35l56_private), GFP_KERNEL);
+	if (!cs35l56)
+		return -ENOMEM;
+
+	cs35l56->dev = dev;
+	cs35l56->irq = client->irq;
+	cs35l56->can_hibernate = true;
+
+	i2c_set_clientdata(client, cs35l56);
+	cs35l56->regmap = devm_regmap_init_i2c(client, regmap_config);
+	if (IS_ERR(cs35l56->regmap)) {
+		ret = PTR_ERR(cs35l56->regmap);
+		return dev_err_probe(cs35l56->dev, ret, "Failed to allocate register map\n");
+	}
+
+	ret = cs35l56_common_probe(cs35l56);
+	if (ret != 0)
+		return ret;
+
+	ret = cs35l56_init(cs35l56);
+	if (ret == 0)
+		ret = cs35l56_irq_request(cs35l56);
+	if (ret < 0)
+		cs35l56_remove(cs35l56);
+
+	return ret;
+}
+
+static void cs35l56_i2c_remove(struct i2c_client *client)
+{
+	struct cs35l56_private *cs35l56 = i2c_get_clientdata(client);
+
+	cs35l56_remove(cs35l56);
+}
+
+static const struct i2c_device_id cs35l56_id_i2c[] = {
+	{ "cs35l56", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cs35l56_id_i2c);
+
+static struct i2c_driver cs35l56_i2c_driver = {
+	.driver = {
+		.name		= "cs35l56",
+		.pm = &cs35l56_pm_ops_i2c_spi,
+	},
+	.id_table	= cs35l56_id_i2c,
+	.probe_new	= cs35l56_i2c_probe,
+	.remove		= cs35l56_i2c_remove,
+};
+
+module_i2c_driver(cs35l56_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC CS35L56 I2C driver");
+MODULE_IMPORT_NS(SND_SOC_CS35L56_CORE);
+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");

sound/soc/codecs/cs35l56-spi.c

+// SPDX-License-Identifier: GPL-2.0-only
+//
+// CS35L56 ALSA SoC audio driver SPI binding
+//
+// Copyright (C) 2023 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <linux/types.h>
+
+#include "cs35l56.h"
+
+static int cs35l56_spi_probe(struct spi_device *spi)
+{
+	const struct regmap_config *regmap_config = &cs35l56_regmap_spi;
+	struct cs35l56_private *cs35l56;
+	int ret;
+
+	cs35l56 = devm_kzalloc(&spi->dev, sizeof(struct cs35l56_private), GFP_KERNEL);
+	if (!cs35l56)
+		return -ENOMEM;
+
+	spi_set_drvdata(spi, cs35l56);
+	cs35l56->regmap = devm_regmap_init_spi(spi, regmap_config);
+	if (IS_ERR(cs35l56->regmap)) {
+		ret = PTR_ERR(cs35l56->regmap);
+		return dev_err_probe(&spi->dev, ret, "Failed to allocate register map\n");
+		return ret;
+	}
+
+	cs35l56->dev = &spi->dev;
+	cs35l56->irq = spi->irq;
+
+	ret = cs35l56_common_probe(cs35l56);
+	if (ret != 0)
+		return ret;
+
+	ret = cs35l56_init(cs35l56);
+	if (ret == 0)
+		ret = cs35l56_irq_request(cs35l56);
+	if (ret < 0)
+		cs35l56_remove(cs35l56);
+
+	return ret;
+}
+
+static void cs35l56_spi_remove(struct spi_device *spi)
+{
+	struct cs35l56_private *cs35l56 = spi_get_drvdata(spi);
+
+	cs35l56_remove(cs35l56);
+}
+
+static const struct spi_device_id cs35l56_id_spi[] = {
+	{ "cs35l56", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, cs35l56_id_spi);
+
+static struct spi_driver cs35l56_spi_driver = {
+	.driver = {
+		.name		= "cs35l56",
+		.pm = &cs35l56_pm_ops_i2c_spi,
+	},
+	.id_table	= cs35l56_id_spi,
+	.probe		= cs35l56_spi_probe,
+	.remove		= cs35l56_spi_remove,
+};
+
+module_spi_driver(cs35l56_spi_driver);
+
+MODULE_DESCRIPTION("ASoC CS35L56 SPI driver");
+MODULE_IMPORT_NS(SND_SOC_CS35L56_CORE);
+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");

sound/soc/codecs/cs35l56.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Driver for Cirrus Logic CS35L56 smart amp
+ *
+ * Copyright (C) 2023 Cirrus Logic, Inc. and
+ *                    Cirrus Logic International Semiconductor Ltd.
+ */
+
+#ifndef CS35L56_H
+#define CS35L56_H
+
+#include <linux/completion.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>
+#include <sound/cs35l56.h>
+#include "wm_adsp.h"
+
+#define CS35L56_SDW_GEN_INT_STAT_1	0xc0
+#define CS35L56_SDW_GEN_INT_MASK_1	0xc1
+#define CS35L56_SDW_INT_MASK_CODEC_IRQ	BIT(0)
+
+#define CS35L56_SDW_INVALID_BUS_SCALE	0xf
+
+#define CS35L56_RX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+#define CS35L56_TX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE \
+			    | SNDRV_PCM_FMTBIT_S32_LE)
+
+#define CS35L56_RATES (SNDRV_PCM_RATE_48000)
+
+struct sdw_slave;
+
+struct cs35l56_private {
+	struct wm_adsp dsp; /* must be first member */
+	struct work_struct dsp_work;
+	struct workqueue_struct *dsp_wq;
+	struct completion dsp_ready_completion;
+	struct mutex irq_lock;
+	struct snd_soc_component *component;
+	struct device *dev;
+	struct regmap *regmap;
+	struct regulator_bulk_data supplies[CS35L56_NUM_BULK_SUPPLIES];
+	int irq;
+	struct sdw_slave *sdw_peripheral;
+	u8 rev;
+	struct work_struct sdw_irq_work;
+	bool secured;
+	bool sdw_irq_no_unmask;
+	bool soft_resetting;
+	bool init_done;
+	bool sdw_attached;
+	bool removing;
+	bool fw_patched;
+	bool can_hibernate;
+	struct completion init_completion;
+	struct gpio_desc *reset_gpio;
+
+	u32 rx_mask;
+	u32 tx_mask;
+	u8 asp_slot_width;
+	u8 asp_slot_count;
+	bool tdm_mode;
+	bool sysclk_set;
+	u8 old_sdw_clock_scale;
+};
+
+extern const struct dev_pm_ops cs35l56_pm_ops_i2c_spi;
+
+int cs35l56_runtime_suspend(struct device *dev);
+int cs35l56_runtime_resume_common(struct cs35l56_private *cs35l56);
+irqreturn_t cs35l56_irq(int irq, void *data);
+int cs35l56_irq_request(struct cs35l56_private *cs35l56);
+int cs35l56_common_probe(struct cs35l56_private *cs35l56);
+int cs35l56_init(struct cs35l56_private *cs35l56);
+int cs35l56_remove(struct cs35l56_private *cs35l56);
+
+#endif /* ifndef CS35L56_H */