ASoC: codecs: Add support for the Infineon PEB2466 codec

The Infineon PEB2466 codec is a programmable DSP-based four channels
codec with filters capabilities.
It also provides signals as GPIOs.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20230206144904.91078-3-herve.codina@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 2085 insertions, 0 deletions

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 5028d67cfd8e..3dc461039f30 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -167,6 +167,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_PCM5102A
 	imply SND_SOC_PCM512x_I2C
 	imply SND_SOC_PCM512x_SPI
+	imply SND_SOC_PEB2466
 	imply SND_SOC_RK3328
 	imply SND_SOC_RK817
 	imply SND_SOC_RT274
@@ -1242,6 +1243,17 @@ config SND_SOC_PCM512x_SPI
 	select SND_SOC_PCM512x
 	select REGMAP_SPI
 
+config SND_SOC_PEB2466
+	tristate "Infineon PEB2466 quad PCM codec"
+	depends on SPI
+	select REGMAP_SPI
+	help
+	  Enable support for the Infineon PEB2466 quad PCM codec,
+	  also named SICOFI 4-uC.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-soc-peb2466.
+
 config SND_SOC_RK3328
 	tristate "Rockchip RK3328 audio CODEC"
 	select REGMAP_MMIO
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index e88cb8b5baec..adbbb8d5e4f4 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -188,6 +188,7 @@ snd-soc-pcm5102a-objs := pcm5102a.o
 snd-soc-pcm512x-objs := pcm512x.o
 snd-soc-pcm512x-i2c-objs := pcm512x-i2c.o
 snd-soc-pcm512x-spi-objs := pcm512x-spi.o
+snd-soc-peb2466-objs := peb2466.o
 snd-soc-rk3328-objs := rk3328_codec.o
 snd-soc-rk817-objs := rk817_codec.o
 snd-soc-rl6231-objs := rl6231.o
@@ -549,6 +550,7 @@ obj-$(CONFIG_SND_SOC_PCM5102A)	+= snd-soc-pcm5102a.o
 obj-$(CONFIG_SND_SOC_PCM512x)	+= snd-soc-pcm512x.o
 obj-$(CONFIG_SND_SOC_PCM512x_I2C)	+= snd-soc-pcm512x-i2c.o
 obj-$(CONFIG_SND_SOC_PCM512x_SPI)	+= snd-soc-pcm512x-spi.o
+obj-$(CONFIG_SND_SOC_PEB2466)	+= snd-soc-peb2466.o
 obj-$(CONFIG_SND_SOC_RK3328)	+= snd-soc-rk3328.o
 obj-$(CONFIG_SND_SOC_RK817)	+= snd-soc-rk817.o
 obj-$(CONFIG_SND_SOC_RL6231)	+= snd-soc-rl6231.o
diff --git a/sound/soc/codecs/peb2466.c b/sound/soc/codecs/peb2466.c
new file mode 100644
index 000000000000..4640b1860312
--- /dev/null
+++ b/sound/soc/codecs/peb2466.c
@@ -0,0 +1,2071 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// peb2466.c  --  Infineon PEB2466 ALSA SoC driver
+//
+// Copyright 2023 CS GROUP France
+//
+// Author: Herve Codina <herve.codina@bootlin.com>
+
+#include <asm/unaligned.h>
+#include <linux/clk.h>
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#define PEB2466_NB_CHANNEL	4
+
+struct peb2466_lookup {
+	u8 (*table)[4];
+	unsigned int count;
+};
+
+#define PEB2466_TLV_SIZE  (sizeof((unsigned int []){TLV_DB_SCALE_ITEM(0, 0, 0)}) / \
+			   sizeof(unsigned int))
+
+struct peb2466_lkup_ctrl {
+	int reg;
+	unsigned int index;
+	const struct peb2466_lookup *lookup;
+	unsigned int tlv_array[PEB2466_TLV_SIZE];
+};
+
+struct peb2466 {
+	struct spi_device *spi;
+	struct clk *mclk;
+	struct gpio_desc *reset_gpio;
+	u8 spi_tx_buf[2 + 8]; /* Cannot use stack area for SPI (dma-safe memory) */
+	u8 spi_rx_buf[2 + 8]; /* Cannot use stack area for SPI (dma-safe memory) */
+	struct regmap *regmap;
+	struct {
+		struct peb2466_lookup ax_lookup;
+		struct peb2466_lookup ar_lookup;
+		struct peb2466_lkup_ctrl ax_lkup_ctrl;
+		struct peb2466_lkup_ctrl ar_lkup_ctrl;
+		unsigned int tg1_freq_item;
+		unsigned int tg2_freq_item;
+	} ch[PEB2466_NB_CHANNEL];
+	int max_chan_playback;
+	int max_chan_capture;
+	struct {
+		struct gpio_chip gpio_chip;
+		struct mutex lock;
+		struct {
+			unsigned int xr0;
+			unsigned int xr1;
+			unsigned int xr2;
+			unsigned int xr3;
+		} cache;
+	} gpio;
+};
+
+#define PEB2466_CMD_R	(1 << 5)
+#define PEB2466_CMD_W	(0 << 5)
+
+#define PEB2466_CMD_MASK 0x18
+#define PEB2466_CMD_XOP  0x18  /* XOP is 0bxxx11xxx */
+#define PEB2466_CMD_SOP  0x10  /* SOP is 0bxxx10xxx */
+#define PEB2466_CMD_COP  0x00  /* COP is 0bxxx0xxxx, handle 0bxxx00xxx */
+#define PEB2466_CMD_COP1 0x08  /* COP is 0bxxx0xxxx, handle 0bxxx01xxx */
+
+#define PEB2466_MAKE_XOP(_lsel)      (PEB2466_CMD_XOP | (_lsel))
+#define PEB2466_MAKE_SOP(_ad, _lsel) (PEB2466_CMD_SOP | ((_ad) << 6) | (_lsel))
+#define PEB2466_MAKE_COP(_ad, _code) (PEB2466_CMD_COP | ((_ad) << 6) | (_code))
+
+#define PEB2466_CR0(_ch)	PEB2466_MAKE_SOP(_ch, 0x0)
+#define   PEB2466_CR0_TH		(1 << 7)
+#define   PEB2466_CR0_IMR1		(1 << 6)
+#define   PEB2466_CR0_FRX		(1 << 5)
+#define   PEB2466_CR0_FRR		(1 << 4)
+#define   PEB2466_CR0_AX		(1 << 3)
+#define   PEB2466_CR0_AR		(1 << 2)
+#define   PEB2466_CR0_THSEL_MASK	(0x3 << 0)
+#define   PEB2466_CR0_THSEL(_set)	((_set) << 0)
+
+#define PEB2466_CR1(_ch)	PEB2466_MAKE_SOP(_ch, 0x1)
+#define   PEB2466_CR1_ETG2		(1 << 7)
+#define   PEB2466_CR1_ETG1		(1 << 6)
+#define   PEB2466_CR1_PTG2		(1 << 5)
+#define   PEB2466_CR1_PTG1		(1 << 4)
+#define   PEB2466_CR1_LAW_MASK		(1 << 3)
+#define   PEB2466_CR1_LAW_ALAW		(0 << 3)
+#define   PEB2466_CR1_LAW_MULAW		(1 << 3)
+#define   PEB2466_CR1_PU		(1 << 0)
+
+#define PEB2466_CR2(_ch)	PEB2466_MAKE_SOP(_ch, 0x2)
+#define PEB2466_CR3(_ch)	PEB2466_MAKE_SOP(_ch, 0x3)
+#define PEB2466_CR4(_ch)	PEB2466_MAKE_SOP(_ch, 0x4)
+#define PEB2466_CR5(_ch)	PEB2466_MAKE_SOP(_ch, 0x5)
+
+#define PEB2466_XR0		PEB2466_MAKE_XOP(0x0)
+#define PEB2466_XR1		PEB2466_MAKE_XOP(0x1)
+#define PEB2466_XR2		PEB2466_MAKE_XOP(0x2)
+#define PEB2466_XR3		PEB2466_MAKE_XOP(0x3)
+#define PEB2466_XR4		PEB2466_MAKE_XOP(0x4)
+#define PEB2466_XR5		PEB2466_MAKE_XOP(0x5)
+#define   PEB2466_XR5_MCLK_1536		(0x0 << 6)
+#define   PEB2466_XR5_MCLK_2048		(0x1 << 6)
+#define   PEB2466_XR5_MCLK_4096		(0x2 << 6)
+#define   PEB2466_XR5_MCLK_8192		(0x3 << 6)
+
+#define PEB2466_XR6		PEB2466_MAKE_XOP(0x6)
+#define   PEB2466_XR6_PCM_OFFSET(_off)	((_off) << 0)
+
+#define PEB2466_XR7		PEB2466_MAKE_XOP(0x7)
+
+#define PEB2466_TH_FILTER_P1(_ch)	PEB2466_MAKE_COP(_ch, 0x0)
+#define PEB2466_TH_FILTER_P2(_ch)	PEB2466_MAKE_COP(_ch, 0x1)
+#define PEB2466_TH_FILTER_P3(_ch)	PEB2466_MAKE_COP(_ch, 0x2)
+#define PEB2466_IMR1_FILTER_P1(_ch)	PEB2466_MAKE_COP(_ch, 0x4)
+#define PEB2466_IMR1_FILTER_P2(_ch)	PEB2466_MAKE_COP(_ch, 0x5)
+#define PEB2466_FRX_FILTER(_ch)		PEB2466_MAKE_COP(_ch, 0x6)
+#define PEB2466_FRR_FILTER(_ch)		PEB2466_MAKE_COP(_ch, 0x7)
+#define PEB2466_AX_FILTER(_ch)		PEB2466_MAKE_COP(_ch, 0x8)
+#define PEB2466_AR_FILTER(_ch)		PEB2466_MAKE_COP(_ch, 0x9)
+#define PEB2466_TG1(_ch)		PEB2466_MAKE_COP(_ch, 0xc)
+#define PEB2466_TG2(_ch)		PEB2466_MAKE_COP(_ch, 0xd)
+
+static int peb2466_write_byte(struct peb2466 *peb2466, u8 cmd, u8 val)
+{
+	struct spi_transfer xfer = {
+		.tx_buf = &peb2466->spi_tx_buf,
+		.len = 2,
+	};
+
+	peb2466->spi_tx_buf[0] = cmd | PEB2466_CMD_W;
+	peb2466->spi_tx_buf[1] = val;
+
+	dev_dbg(&peb2466->spi->dev, "write byte (cmd %02x) %02x\n",
+		peb2466->spi_tx_buf[0], peb2466->spi_tx_buf[1]);
+
+	return spi_sync_transfer(peb2466->spi, &xfer, 1);
+}
+
+static int peb2466_read_byte(struct peb2466 *peb2466, u8 cmd, u8 *val)
+{
+	struct spi_transfer xfer = {
+		.tx_buf = &peb2466->spi_tx_buf,
+		.rx_buf = &peb2466->spi_rx_buf,
+		.len = 3,
+	};
+	int ret;
+
+	peb2466->spi_tx_buf[0] = cmd | PEB2466_CMD_R;
+
+	ret = spi_sync_transfer(peb2466->spi, &xfer, 1);
+	if (ret)
+		return ret;
+
+	if (peb2466->spi_rx_buf[1] != 0x81) {
+		dev_err(&peb2466->spi->dev,
+			"spi xfer rd (cmd %02x) invalid ident byte (0x%02x)\n",
+			peb2466->spi_tx_buf[0], peb2466->spi_rx_buf[1]);
+		return -EILSEQ;
+	}
+
+	*val = peb2466->spi_rx_buf[2];
+
+	dev_dbg(&peb2466->spi->dev, "read byte (cmd %02x) %02x\n",
+		peb2466->spi_tx_buf[0], *val);
+
+	return 0;
+}
+
+static int peb2466_write_buf(struct peb2466 *peb2466, u8 cmd, const u8 *buf, unsigned int len)
+{
+	struct spi_transfer xfer = {
+		.tx_buf = &peb2466->spi_tx_buf,
+		.len = len + 1,
+	};
+
+	if (len > 8)
+		return -EINVAL;
+
+	peb2466->spi_tx_buf[0] = cmd | PEB2466_CMD_W;
+	memcpy(&peb2466->spi_tx_buf[1], buf, len);
+
+	dev_dbg(&peb2466->spi->dev, "write buf (cmd %02x, %u) %*ph\n",
+		peb2466->spi_tx_buf[0], len, len, &peb2466->spi_tx_buf[1]);
+
+	return spi_sync_transfer(peb2466->spi, &xfer, 1);
+}
+
+static int peb2466_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+	struct peb2466 *peb2466 = context;
+	int ret;
+
+	/*
+	 * Only XOP and SOP commands can be handled as registers.
+	 * COP commands are handled using direct peb2466_write_buf() calls.
+	 */
+	switch (reg & PEB2466_CMD_MASK) {
+	case PEB2466_CMD_XOP:
+	case PEB2466_CMD_SOP:
+		ret = peb2466_write_byte(peb2466, reg, val);
+		break;
+	default:
+		dev_err(&peb2466->spi->dev, "Not a XOP or SOP command\n");
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int peb2466_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+	struct peb2466 *peb2466 = context;
+	int ret;
+	u8 tmp;
+
+	/* Only XOP and SOP commands can be handled as registers */
+	switch (reg & PEB2466_CMD_MASK) {
+	case PEB2466_CMD_XOP:
+	case PEB2466_CMD_SOP:
+		ret = peb2466_read_byte(peb2466, reg, &tmp);
+		*val = tmp;
+		break;
+	default:
+		dev_err(&peb2466->spi->dev, "Not a XOP or SOP command\n");
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static const struct regmap_config peb2466_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xFF,
+	.reg_write = peb2466_reg_write,
+	.reg_read = peb2466_reg_read,
+	.cache_type = REGCACHE_NONE,
+};
+
+static int peb2466_lkup_ctrl_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	struct peb2466_lkup_ctrl *lkup_ctrl =
+		(struct peb2466_lkup_ctrl *)kcontrol->private_value;
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = lkup_ctrl->lookup->count - 1;
+	return 0;
+}
+
+static int peb2466_lkup_ctrl_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct peb2466_lkup_ctrl *lkup_ctrl =
+		(struct peb2466_lkup_ctrl *)kcontrol->private_value;
+
+	ucontrol->value.integer.value[0] = lkup_ctrl->index;
+	return 0;
+}
+
+static int peb2466_lkup_ctrl_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct peb2466_lkup_ctrl *lkup_ctrl =
+		(struct peb2466_lkup_ctrl *)kcontrol->private_value;
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	unsigned int index;
+	int ret;
+
+	index = ucontrol->value.integer.value[0];
+	if (index >= lkup_ctrl->lookup->count)
+		return -EINVAL;
+
+	if (index == lkup_ctrl->index)
+		return 0;
+
+	ret = peb2466_write_buf(peb2466, lkup_ctrl->reg,
+				lkup_ctrl->lookup->table[index], 4);
+	if (ret)
+		return ret;
+
+	lkup_ctrl->index = index;
+	return 1; /* The value changed */
+}
+
+static int peb2466_add_lkup_ctrl(struct snd_soc_component *component,
+				 struct peb2466_lkup_ctrl *lkup_ctrl,
+				 const char *name, int min_val, int step)
+{
+	DECLARE_TLV_DB_SCALE(tlv_array, min_val, step, 0);
+	struct snd_kcontrol_new control = {0};
+
+	BUILD_BUG_ON(sizeof(lkup_ctrl->tlv_array) < sizeof(tlv_array));
+	memcpy(lkup_ctrl->tlv_array, tlv_array, sizeof(tlv_array));
+
+	control.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	control.name = name;
+	control.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+			 SNDRV_CTL_ELEM_ACCESS_READWRITE;
+	control.tlv.p = lkup_ctrl->tlv_array;
+	control.info = peb2466_lkup_ctrl_info;
+	control.get = peb2466_lkup_ctrl_get;
+	control.put = peb2466_lkup_ctrl_put;
+	control.private_value = (unsigned long)lkup_ctrl;
+
+	return snd_soc_add_component_controls(component, &control, 1);
+}
+
+enum peb2466_tone_freq {
+	PEB2466_TONE_697HZ,
+	PEB2466_TONE_800HZ,
+	PEB2466_TONE_950HZ,
+	PEB2466_TONE_1000HZ,
+	PEB2466_TONE_1008HZ,
+	PEB2466_TONE_2000HZ,
+};
+
+static const u8 peb2466_tone_lookup[][4] = {
+	[PEB2466_TONE_697HZ] = {0x0a, 0x33, 0x5a, 0x2c},
+	[PEB2466_TONE_800HZ] = {0x12, 0xD6, 0x5a, 0xc0},
+	[PEB2466_TONE_950HZ] = {0x1c, 0xf0, 0x5c, 0xc0},
+	[PEB2466_TONE_1000HZ] = {0}, /* lookup value not used for 1000Hz */
+	[PEB2466_TONE_1008HZ] = {0x1a, 0xae, 0x57, 0x70},
+	[PEB2466_TONE_2000HZ] = {0x00, 0x80, 0x50, 0x09},
+};
+
+static const char * const peb2466_tone_freq_txt[] = {
+	[PEB2466_TONE_697HZ] = "697Hz",
+	[PEB2466_TONE_800HZ] = "800Hz",
+	[PEB2466_TONE_950HZ] = "950Hz",
+	[PEB2466_TONE_1000HZ] = "1000Hz",
+	[PEB2466_TONE_1008HZ] = "1008Hz",
+	[PEB2466_TONE_2000HZ] = "2000Hz"
+};
+
+static const struct soc_enum peb2466_tg_freq[][2] = {
+	[0] = {
+		SOC_ENUM_SINGLE(PEB2466_TG1(0), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt),
+		SOC_ENUM_SINGLE(PEB2466_TG2(0), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt)
+	},
+	[1] = {
+		SOC_ENUM_SINGLE(PEB2466_TG1(1), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt),
+		SOC_ENUM_SINGLE(PEB2466_TG2(1), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt)
+	},
+	[2] = {
+		SOC_ENUM_SINGLE(PEB2466_TG1(2), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt),
+		SOC_ENUM_SINGLE(PEB2466_TG2(2), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt)
+	},
+	[3] = {
+		SOC_ENUM_SINGLE(PEB2466_TG1(3), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt),
+		SOC_ENUM_SINGLE(PEB2466_TG2(3), 0, ARRAY_SIZE(peb2466_tone_freq_txt),
+				peb2466_tone_freq_txt)
+	}
+};
+
+static int peb2466_tg_freq_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+
+	switch (e->reg) {
+	case PEB2466_TG1(0):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[0].tg1_freq_item;
+		break;
+	case PEB2466_TG2(0):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[0].tg2_freq_item;
+		break;
+	case PEB2466_TG1(1):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[1].tg1_freq_item;
+		break;
+	case PEB2466_TG2(1):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[1].tg2_freq_item;
+		break;
+	case PEB2466_TG1(2):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[2].tg1_freq_item;
+		break;
+	case PEB2466_TG2(2):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[2].tg2_freq_item;
+		break;
+	case PEB2466_TG1(3):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[3].tg1_freq_item;
+		break;
+	case PEB2466_TG2(3):
+		ucontrol->value.enumerated.item[0] = peb2466->ch[3].tg2_freq_item;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int peb2466_tg_freq_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int *tg_freq_item;
+	u8 cr1_reg, cr1_mask;
+	unsigned int index;
+	int ret;
+
+	index = ucontrol->value.enumerated.item[0];
+
+	if (index >= ARRAY_SIZE(peb2466_tone_lookup))
+		return -EINVAL;
+
+	switch (e->reg) {
+	case PEB2466_TG1(0):
+		tg_freq_item = &peb2466->ch[0].tg1_freq_item;
+		cr1_reg = PEB2466_CR1(0);
+		cr1_mask = PEB2466_CR1_PTG1;
+		break;
+	case PEB2466_TG2(0):
+		tg_freq_item = &peb2466->ch[0].tg2_freq_item;
+		cr1_reg = PEB2466_CR1(0);
+		cr1_mask = PEB2466_CR1_PTG2;
+		break;
+	case PEB2466_TG1(1):
+		tg_freq_item = &peb2466->ch[1].tg1_freq_item;
+		cr1_reg = PEB2466_CR1(1);
+		cr1_mask = PEB2466_CR1_PTG1;
+		break;
+	case PEB2466_TG2(1):
+		tg_freq_item = &peb2466->ch[1].tg2_freq_item;
+		cr1_reg = PEB2466_CR1(1);
+		cr1_mask = PEB2466_CR1_PTG2;
+		break;
+	case PEB2466_TG1(2):
+		tg_freq_item = &peb2466->ch[2].tg1_freq_item;
+		cr1_reg = PEB2466_CR1(2);
+		cr1_mask = PEB2466_CR1_PTG1;
+		break;
+	case PEB2466_TG2(2):
+		tg_freq_item = &peb2466->ch[2].tg2_freq_item;
+		cr1_reg = PEB2466_CR1(2);
+		cr1_mask = PEB2466_CR1_PTG2;
+		break;
+	case PEB2466_TG1(3):
+		tg_freq_item = &peb2466->ch[3].tg1_freq_item;
+		cr1_reg = PEB2466_CR1(3);
+		cr1_mask = PEB2466_CR1_PTG1;
+		break;
+	case PEB2466_TG2(3):
+		tg_freq_item = &peb2466->ch[3].tg2_freq_item;
+		cr1_reg = PEB2466_CR1(3);
+		cr1_mask = PEB2466_CR1_PTG2;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (index == *tg_freq_item)
+		return 0;
+
+	if (index == PEB2466_TONE_1000HZ) {
+		ret = regmap_update_bits(peb2466->regmap, cr1_reg, cr1_mask, 0);
+		if (ret)
+			return ret;
+	} else {
+		ret = peb2466_write_buf(peb2466, e->reg, peb2466_tone_lookup[index], 4);
+		if (ret)
+			return ret;
+		ret = regmap_update_bits(peb2466->regmap, cr1_reg, cr1_mask, cr1_mask);
+		if (ret)
+			return ret;
+	}
+
+	*tg_freq_item = index;
+	return 1; /* The value changed */
+}
+
+static const struct snd_kcontrol_new peb2466_ch0_out_mix_controls[] = {
+	SOC_DAPM_SINGLE("TG1 Switch", PEB2466_CR1(0), 6, 1, 0),
+	SOC_DAPM_SINGLE("TG2 Switch", PEB2466_CR1(0), 7, 1, 0),
+	SOC_DAPM_SINGLE("Voice Switch", PEB2466_CR2(0), 0, 1, 0)
+};
+
+static const struct snd_kcontrol_new peb2466_ch1_out_mix_controls[] = {
+	SOC_DAPM_SINGLE("TG1 Switch", PEB2466_CR1(1), 6, 1, 0),
+	SOC_DAPM_SINGLE("TG2 Switch", PEB2466_CR1(1), 7, 1, 0),
+	SOC_DAPM_SINGLE("Voice Switch", PEB2466_CR2(1), 0, 1, 0)
+};
+
+static const struct snd_kcontrol_new peb2466_ch2_out_mix_controls[] = {
+	SOC_DAPM_SINGLE("TG1 Switch", PEB2466_CR1(2), 6, 1, 0),
+	SOC_DAPM_SINGLE("TG2 Switch", PEB2466_CR1(2), 7, 1, 0),
+	SOC_DAPM_SINGLE("Voice Switch", PEB2466_CR2(2), 0, 1, 0)
+};
+
+static const struct snd_kcontrol_new peb2466_ch3_out_mix_controls[] = {
+	SOC_DAPM_SINGLE("TG1 Switch", PEB2466_CR1(3), 6, 1, 0),
+	SOC_DAPM_SINGLE("TG2 Switch", PEB2466_CR1(3), 7, 1, 0),
+	SOC_DAPM_SINGLE("Voice Switch", PEB2466_CR2(3), 0, 1, 0)
+};
+
+static const struct snd_kcontrol_new peb2466_controls[] = {
+	/* Attenuators */
+	SOC_SINGLE("DAC0 -6dB Playback Switch", PEB2466_CR3(0), 2, 1, 0),
+	SOC_SINGLE("DAC1 -6dB Playback Switch", PEB2466_CR3(1), 2, 1, 0),
+	SOC_SINGLE("DAC2 -6dB Playback Switch", PEB2466_CR3(2), 2, 1, 0),
+	SOC_SINGLE("DAC3 -6dB Playback Switch", PEB2466_CR3(3), 2, 1, 0),
+
+	/* Amplifiers */
+	SOC_SINGLE("ADC0 +6dB Capture Switch", PEB2466_CR3(0), 3, 1, 0),
+	SOC_SINGLE("ADC1 +6dB Capture Switch", PEB2466_CR3(1), 3, 1, 0),
+	SOC_SINGLE("ADC2 +6dB Capture Switch", PEB2466_CR3(2), 3, 1, 0),
+	SOC_SINGLE("ADC3 +6dB Capture Switch", PEB2466_CR3(3), 3, 1, 0),
+
+	/* Tone generators */
+	SOC_ENUM_EXT("DAC0 TG1 Freq", peb2466_tg_freq[0][0],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC1 TG1 Freq", peb2466_tg_freq[1][0],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC2 TG1 Freq", peb2466_tg_freq[2][0],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC3 TG1 Freq", peb2466_tg_freq[3][0],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+
+	SOC_ENUM_EXT("DAC0 TG2 Freq", peb2466_tg_freq[0][1],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC1 TG2 Freq", peb2466_tg_freq[1][1],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC2 TG2 Freq", peb2466_tg_freq[2][1],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+	SOC_ENUM_EXT("DAC3 TG2 Freq", peb2466_tg_freq[3][1],
+		     peb2466_tg_freq_get, peb2466_tg_freq_put),
+};
+
+static const struct snd_soc_dapm_widget peb2466_dapm_widgets[] = {
+	SND_SOC_DAPM_SUPPLY("CH0 PWR", PEB2466_CR1(0), 0, 0, NULL, 0),
+	SND_SOC_DAPM_SUPPLY("CH1 PWR", PEB2466_CR1(1), 0, 0, NULL, 0),
+	SND_SOC_DAPM_SUPPLY("CH2 PWR", PEB2466_CR1(2), 0, 0, NULL, 0),
+	SND_SOC_DAPM_SUPPLY("CH3 PWR", PEB2466_CR1(3), 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_DAC("CH0 DIN", "Playback", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("CH1 DIN", "Playback", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("CH2 DIN", "Playback", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("CH3 DIN", "Playback", SND_SOC_NOPM, 0, 0),
+
+	SND_SOC_DAPM_SIGGEN("CH0 TG1"),
+	SND_SOC_DAPM_SIGGEN("CH1 TG1"),
+	SND_SOC_DAPM_SIGGEN("CH2 TG1"),
+	SND_SOC_DAPM_SIGGEN("CH3 TG1"),
+
+	SND_SOC_DAPM_SIGGEN("CH0 TG2"),
+	SND_SOC_DAPM_SIGGEN("CH1 TG2"),
+	SND_SOC_DAPM_SIGGEN("CH2 TG2"),
+	SND_SOC_DAPM_SIGGEN("CH3 TG2"),
+
+	SND_SOC_DAPM_MIXER("DAC0 Mixer", SND_SOC_NOPM, 0, 0,
+			   peb2466_ch0_out_mix_controls,
+			   ARRAY_SIZE(peb2466_ch0_out_mix_controls)),
+	SND_SOC_DAPM_MIXER("DAC1 Mixer", SND_SOC_NOPM, 0, 0,
+			   peb2466_ch1_out_mix_controls,
+			   ARRAY_SIZE(peb2466_ch1_out_mix_controls)),
+	SND_SOC_DAPM_MIXER("DAC2 Mixer", SND_SOC_NOPM, 0, 0,
+			   peb2466_ch2_out_mix_controls,
+			   ARRAY_SIZE(peb2466_ch2_out_mix_controls)),
+	SND_SOC_DAPM_MIXER("DAC3 Mixer", SND_SOC_NOPM, 0, 0,
+			   peb2466_ch3_out_mix_controls,
+			   ARRAY_SIZE(peb2466_ch3_out_mix_controls)),
+
+	SND_SOC_DAPM_PGA("DAC0 PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("DAC1 PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("DAC2 PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("DAC3 PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_OUTPUT("OUT0"),
+	SND_SOC_DAPM_OUTPUT("OUT1"),
+	SND_SOC_DAPM_OUTPUT("OUT2"),
+	SND_SOC_DAPM_OUTPUT("OUT3"),
+
+	SND_SOC_DAPM_INPUT("IN0"),
+	SND_SOC_DAPM_INPUT("IN1"),
+	SND_SOC_DAPM_INPUT("IN2"),
+	SND_SOC_DAPM_INPUT("IN3"),
+
+	SND_SOC_DAPM_DAC("ADC0", "Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("ADC1", "Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("ADC2", "Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("ADC3", "Capture", SND_SOC_NOPM, 0, 0),
+};
+
+static const struct snd_soc_dapm_route peb2466_dapm_routes[] = {
+	{ "CH0 DIN", NULL, "CH0 PWR" },
+	{ "CH1 DIN", NULL, "CH1 PWR" },
+	{ "CH2 DIN", NULL, "CH2 PWR" },
+	{ "CH3 DIN", NULL, "CH3 PWR" },
+
+	{ "CH0 TG1", NULL, "CH0 PWR" },
+	{ "CH1 TG1", NULL, "CH1 PWR" },
+	{ "CH2 TG1", NULL, "CH2 PWR" },
+	{ "CH3 TG1", NULL, "CH3 PWR" },
+
+	{ "CH0 TG2", NULL, "CH0 PWR" },
+	{ "CH1 TG2", NULL, "CH1 PWR" },
+	{ "CH2 TG2", NULL, "CH2 PWR" },
+	{ "CH3 TG2", NULL, "CH3 PWR" },
+
+	{ "DAC0 Mixer", "TG1 Switch", "CH0 TG1" },
+	{ "DAC0 Mixer", "TG2 Switch", "CH0 TG2" },
+	{ "DAC0 Mixer", "Voice Switch", "CH0 DIN" },
+	{ "DAC0 Mixer", NULL, "CH0 DIN" },
+
+	{ "DAC1 Mixer", "TG1 Switch", "CH1 TG1" },
+	{ "DAC1 Mixer", "TG2 Switch", "CH1 TG2" },
+	{ "DAC1 Mixer", "Voice Switch", "CH1 DIN" },
+	{ "DAC1 Mixer", NULL, "CH1 DIN" },
+
+	{ "DAC2 Mixer", "TG1 Switch", "CH2 TG1" },
+	{ "DAC2 Mixer", "TG2 Switch", "CH2 TG2" },
+	{ "DAC2 Mixer", "Voice Switch", "CH2 DIN" },
+	{ "DAC2 Mixer", NULL, "CH2 DIN" },
+
+	{ "DAC3 Mixer", "TG1 Switch", "CH3 TG1" },
+	{ "DAC3 Mixer", "TG2 Switch", "CH3 TG2" },
+	{ "DAC3 Mixer", "Voice Switch", "CH3 DIN" },
+	{ "DAC3 Mixer", NULL, "CH3 DIN" },
+
+	{ "DAC0 PGA", NULL, "DAC0 Mixer" },
+	{ "DAC1 PGA", NULL, "DAC1 Mixer" },
+	{ "DAC2 PGA", NULL, "DAC2 Mixer" },
+	{ "DAC3 PGA", NULL, "DAC3 Mixer" },
+
+	{ "OUT0", NULL, "DAC0 PGA" },
+	{ "OUT1", NULL, "DAC1 PGA" },
+	{ "OUT2", NULL, "DAC2 PGA" },
+	{ "OUT3", NULL, "DAC3 PGA" },
+
+	{ "ADC0", NULL, "IN0" },
+	{ "ADC1", NULL, "IN1" },
+	{ "ADC2", NULL, "IN2" },
+	{ "ADC3", NULL, "IN3" },
+
+	{ "ADC0", NULL, "CH0 PWR" },
+	{ "ADC1", NULL, "CH1 PWR" },
+	{ "ADC2", NULL, "CH2 PWR" },
+	{ "ADC3", NULL, "CH3 PWR" },
+};
+
+static int peb2466_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+				    unsigned int rx_mask, int slots, int width)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(dai->component);
+	unsigned int chan;
+	unsigned int mask;
+	u8 slot;
+	int ret;
+
+	switch (width) {
+	case 0:
+		/* Not set -> default 8 */
+	case 8:
+		break;
+	default:
+		dev_err(dai->dev, "tdm slot width %d not supported\n", width);
+		return -EINVAL;
+	}
+
+	mask = tx_mask;
+	slot = 0;
+	chan = 0;
+	while (mask && chan < PEB2466_NB_CHANNEL) {
+		if (mask & 0x1) {
+			ret = regmap_write(peb2466->regmap, PEB2466_CR5(chan), slot);
+			if (ret) {
+				dev_err(dai->dev, "chan %d set tx tdm slot failed (%d)\n",
+					chan, ret);
+				return ret;
+			}
+			chan++;
+		}
+		mask >>= 1;
+		slot++;
+	}
+	if (mask) {
+		dev_err(dai->dev, "too much tx slots defined (mask = 0x%x) support max %d\n",
+			tx_mask, PEB2466_NB_CHANNEL);
+		return -EINVAL;
+	}
+	peb2466->max_chan_playback = chan;
+
+	mask = rx_mask;
+	slot = 0;
+	chan = 0;
+	while (mask && chan < PEB2466_NB_CHANNEL) {
+		if (mask & 0x1) {
+			ret = regmap_write(peb2466->regmap, PEB2466_CR4(chan), slot);
+			if (ret) {
+				dev_err(dai->dev, "chan %d set rx tdm slot failed (%d)\n",
+					chan, ret);
+				return ret;
+			}
+			chan++;
+		}
+		mask >>= 1;
+		slot++;
+	}
+	if (mask) {
+		dev_err(dai->dev, "too much rx slots defined (mask = 0x%x) support max %d\n",
+			rx_mask, PEB2466_NB_CHANNEL);
+		return -EINVAL;
+	}
+	peb2466->max_chan_capture = chan;
+
+	return 0;
+}
+
+static int peb2466_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(dai->component);
+	u8 xr6;
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_DSP_A:
+		xr6 = PEB2466_XR6_PCM_OFFSET(1);
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		xr6 = PEB2466_XR6_PCM_OFFSET(0);
+		break;
+	default:
+		dev_err(dai->dev, "Unsupported format 0x%x\n",
+			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+		return -EINVAL;
+	}
+	return regmap_write(peb2466->regmap, PEB2466_XR6, xr6);
+}
+
+static int peb2466_dai_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *params,
+				 struct snd_soc_dai *dai)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(dai->component);
+	unsigned int ch;
+	int ret;
+	u8 cr1;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_MU_LAW:
+		cr1 = PEB2466_CR1_LAW_MULAW;
+		break;
+	case SNDRV_PCM_FORMAT_A_LAW:
+		cr1 = PEB2466_CR1_LAW_ALAW;
+		break;
+	default:
+		dev_err(&peb2466->spi->dev, "Unsupported format 0x%x\n",
+			params_format(params));
+		return -EINVAL;
+	}
+
+	for (ch = 0; ch < PEB2466_NB_CHANNEL; ch++) {
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR1(ch),
+					 PEB2466_CR1_LAW_MASK, cr1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const unsigned int peb2466_sample_bits[] = {8};
+
+static struct snd_pcm_hw_constraint_list peb2466_sample_bits_constr = {
+	.list = peb2466_sample_bits,
+	.count = ARRAY_SIZE(peb2466_sample_bits),
+};
+
+static int peb2466_dai_startup(struct snd_pcm_substream *substream,
+			       struct snd_soc_dai *dai)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(dai->component);
+	unsigned int max_ch;
+	int ret;
+
+	max_ch = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+		peb2466->max_chan_playback : peb2466->max_chan_capture;
+
+	/*
+	 * Disable stream support (min = 0, max = 0) if no timeslots were
+	 * configured.
+	 */
+	ret = snd_pcm_hw_constraint_minmax(substream->runtime,
+					   SNDRV_PCM_HW_PARAM_CHANNELS,
+					   max_ch ? 1 : 0, max_ch);
+	if (ret < 0)
+		return ret;
+
+	return snd_pcm_hw_constraint_list(substream->runtime, 0,
+					  SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+					  &peb2466_sample_bits_constr);
+}
+
+static u64 peb2466_dai_formats[] = {
+	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
+	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
+};
+
+static const struct snd_soc_dai_ops peb2466_dai_ops = {
+	.startup = peb2466_dai_startup,
+	.hw_params = peb2466_dai_hw_params,
+	.set_tdm_slot = peb2466_dai_set_tdm_slot,
+	.set_fmt = peb2466_dai_set_fmt,
+	.auto_selectable_formats     = peb2466_dai_formats,
+	.num_auto_selectable_formats = ARRAY_SIZE(peb2466_dai_formats),
+};
+
+static struct snd_soc_dai_driver peb2466_dai_driver = {
+	.name = "peb2466",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = PEB2466_NB_CHANNEL,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = PEB2466_NB_CHANNEL,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+	},
+	.ops = &peb2466_dai_ops,
+};
+
+static int peb2466_reset_audio(struct peb2466 *peb2466)
+{
+	static const struct reg_sequence reg_reset[] = {
+		{  .reg = PEB2466_XR6,    .def = 0x00 },
+
+		{  .reg = PEB2466_CR5(0), .def = 0x00 },
+		{  .reg = PEB2466_CR4(0), .def = 0x00 },
+		{  .reg = PEB2466_CR3(0), .def = 0x00 },
+		{  .reg = PEB2466_CR2(0), .def = 0x00 },
+		{  .reg = PEB2466_CR1(0), .def = 0x00 },
+		{  .reg = PEB2466_CR0(0), .def = PEB2466_CR0_IMR1 },
+
+		{  .reg = PEB2466_CR5(1), .def = 0x00 },
+		{  .reg = PEB2466_CR4(1), .def = 0x00 },
+		{  .reg = PEB2466_CR3(1), .def = 0x00 },
+		{  .reg = PEB2466_CR2(1), .def = 0x00 },
+		{  .reg = PEB2466_CR1(1), .def = 0x00 },
+		{  .reg = PEB2466_CR0(1), .def = PEB2466_CR0_IMR1 },
+
+		{  .reg = PEB2466_CR5(2), .def = 0x00 },
+		{  .reg = PEB2466_CR4(2), .def = 0x00 },
+		{  .reg = PEB2466_CR3(2), .def = 0x00 },
+		{  .reg = PEB2466_CR2(2), .def = 0x00 },
+		{  .reg = PEB2466_CR1(2), .def = 0x00 },
+		{  .reg = PEB2466_CR0(2), .def = PEB2466_CR0_IMR1 },
+
+		{  .reg = PEB2466_CR5(3), .def = 0x00 },
+		{  .reg = PEB2466_CR4(3), .def = 0x00 },
+		{  .reg = PEB2466_CR3(3), .def = 0x00 },
+		{  .reg = PEB2466_CR2(3), .def = 0x00 },
+		{  .reg = PEB2466_CR1(3), .def = 0x00 },
+		{  .reg = PEB2466_CR0(3), .def = PEB2466_CR0_IMR1 },
+	};
+	static const u8 imr1_p1[8] = {0x00, 0x90, 0x09, 0x00, 0x90, 0x09, 0x00, 0x00};
+	static const u8 imr1_p2[8] = {0x7F, 0xFF, 0x00, 0x00, 0x90, 0x14, 0x40, 0x08};
+	static const u8 zero[8] = {0};
+	int ret;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		peb2466->ch[i].tg1_freq_item = PEB2466_TONE_1000HZ;
+		peb2466->ch[i].tg2_freq_item = PEB2466_TONE_1000HZ;
+
+		/*
+		 * Even if not used, disabling IM/R1 filter is not recommended.
+		 * Instead, we must configure it with default coefficients and
+		 * enable it.
+		 * The filter will be enabled right after (in the following
+		 * regmap_multi_reg_write() call).
+		 */
+		ret = peb2466_write_buf(peb2466, PEB2466_IMR1_FILTER_P1(i), imr1_p1, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_IMR1_FILTER_P2(i), imr1_p2, 8);
+		if (ret)
+			return ret;
+
+		/* Set all other filters coefficients to zero */
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P1(i), zero, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P2(i), zero, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P3(i), zero, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_FRX_FILTER(i), zero, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_FRR_FILTER(i), zero, 8);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_AX_FILTER(i), zero, 4);
+		if (ret)
+			return ret;
+		ret = peb2466_write_buf(peb2466, PEB2466_AR_FILTER(i), zero, 4);
+		if (ret)
+			return ret;
+	}
+
+	return regmap_multi_reg_write(peb2466->regmap, reg_reset, ARRAY_SIZE(reg_reset));
+}
+
+static int peb2466_fw_parse_thfilter(struct snd_soc_component *component,
+				     u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw TH filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * TH_FILTER TLV data:
+	 *   - @0  1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1  8 bytes: TH-Filter coefficients part1
+	 *   - @9  8 bytes: TH-Filter coefficients part2
+	 *   - @17 8 bytes: TH-Filter coefficients part3
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_TH, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P1(i), data + 1, 8);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P2(i), data + 9, 8);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_TH_FILTER_P3(i), data + 17, 8);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_TH | PEB2466_CR0_THSEL_MASK,
+					 PEB2466_CR0_TH | PEB2466_CR0_THSEL(i));
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int peb2466_fw_parse_imr1filter(struct snd_soc_component *component,
+				       u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw IM/R1 filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * IMR1_FILTER TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 8 bytes: IM/R1-Filter coefficients part1
+	 *   - @9 8 bytes: IM/R1-Filter coefficients part2
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_IMR1, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_IMR1_FILTER_P1(i), data + 1, 8);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_IMR1_FILTER_P2(i), data + 9, 8);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_IMR1, PEB2466_CR0_IMR1);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int peb2466_fw_parse_frxfilter(struct snd_soc_component *component,
+				      u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw FRX filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * FRX_FILTER TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 8 bytes: FRX-Filter coefficients
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_FRX, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_FRX_FILTER(i), data + 1, 8);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_FRX, PEB2466_CR0_FRX);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int peb2466_fw_parse_frrfilter(struct snd_soc_component *component,
+				      u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw FRR filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * FRR_FILTER TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 8 bytes: FRR-Filter coefficients
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_FRR, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_FRR_FILTER(i), data + 1, 8);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_FRR, PEB2466_CR0_FRR);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int peb2466_fw_parse_axfilter(struct snd_soc_component *component,
+				     u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw AX filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * AX_FILTER TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 4 bytes: AX-Filter coefficients
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AX, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_AX_FILTER(i), data + 1, 4);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AX, PEB2466_CR0_AX);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int peb2466_fw_parse_arfilter(struct snd_soc_component *component,
+				     u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	u8 mask;
+	int ret;
+	int i;
+
+	dev_info(component->dev, "fw AR filter: mask %x, %*phN\n", *data,
+		 lng - 1, data + 1);
+
+	/*
+	 * AR_FILTER TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 4 bytes: AR-Filter coefficients
+	 */
+	mask = *data;
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AR, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_AR_FILTER(i), data + 1, 4);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AR, PEB2466_CR0_AR);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static const char * const peb2466_ax_ctrl_names[] = {
+	"ADC0 Capture Volume",
+	"ADC1 Capture Volume",
+	"ADC2 Capture Volume",
+	"ADC3 Capture Volume",
+};
+
+static int peb2466_fw_parse_axtable(struct snd_soc_component *component,
+				    u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	struct peb2466_lkup_ctrl *lkup_ctrl;
+	struct peb2466_lookup *lookup;
+	u8 (*table)[4];
+	u32 table_size;
+	u32 init_index;
+	s32 min_val;
+	s32 step;
+	u8 mask;
+	int ret;
+	int i;
+
+	/*
+	 * AX_TABLE TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 32bits signed: Min table value in centi dB (MinVal)
+	 *                       ie -300 means -3.0 dB
+	 *   - @5 32bits signed: Step from on item to other item in centi dB (Step)
+	 *                       ie 25 means 0.25 dB)
+	 *   - @9 32bits unsigned: Item index in the table to use for the initial
+	 *                         value
+	 *   - @13 N*4 bytes: Table composed of 4 bytes items.
+	 *                    Each item correspond to an AX filter value.
+	 *
+	 * The conversion from raw value item in the table to/from the value in
+	 * dB is: Raw value at index i <-> (MinVal + i * Step) in centi dB.
+	 */
+
+	/* Check Lng and extract the table size. */
+	if (lng < 13 || ((lng - 13) % 4)) {
+		dev_err(component->dev, "fw AX table lng %u invalid\n", lng);
+		return -EINVAL;
+	}
+	table_size = lng - 13;
+
+	min_val = get_unaligned_be32(data + 1);
+	step = get_unaligned_be32(data + 5);
+	init_index = get_unaligned_be32(data + 9);
+	if (init_index >= (table_size / 4)) {
+		dev_err(component->dev, "fw AX table index %u out of table[%u]\n",
+			init_index, table_size / 4);
+		return -EINVAL;
+	}
+
+	dev_info(component->dev,
+		 "fw AX table: mask %x, min %d, step %d, %u items, tbl[%u] %*phN\n",
+		 *data, min_val, step, table_size / 4, init_index,
+		 4, data + 13 + (init_index * 4));
+
+	BUILD_BUG_ON(sizeof(*table) != 4);
+	table = devm_kzalloc(&peb2466->spi->dev, table_size, GFP_KERNEL);
+	if (!table)
+		return -ENOMEM;
+	memcpy(table, data + 13, table_size);
+
+	mask = *data;
+	BUILD_BUG_ON(ARRAY_SIZE(peb2466_ax_ctrl_names) != ARRAY_SIZE(peb2466->ch));
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		lookup = &peb2466->ch[i].ax_lookup;
+		lookup->table = table;
+		lookup->count = table_size / 4;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AX, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_AX_FILTER(i),
+					lookup->table[init_index], 4);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AX, PEB2466_CR0_AX);
+		if (ret)
+			return ret;
+
+		lkup_ctrl = &peb2466->ch[i].ax_lkup_ctrl;
+		lkup_ctrl->lookup = lookup;
+		lkup_ctrl->reg = PEB2466_AX_FILTER(i);
+		lkup_ctrl->index = init_index;
+
+		ret = peb2466_add_lkup_ctrl(component, lkup_ctrl,
+					    peb2466_ax_ctrl_names[i],
+					    min_val, step);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static const char * const peb2466_ar_ctrl_names[] = {
+	"DAC0 Playback Volume",
+	"DAC1 Playback Volume",
+	"DAC2 Playback Volume",
+	"DAC3 Playback Volume",
+};
+
+static int peb2466_fw_parse_artable(struct snd_soc_component *component,
+				    u16 tag, u32 lng, const u8 *data)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	struct peb2466_lkup_ctrl *lkup_ctrl;
+	struct peb2466_lookup *lookup;
+	u8 (*table)[4];
+	u32 table_size;
+	u32 init_index;
+	s32 min_val;
+	s32 step;
+	u8 mask;
+	int ret;
+	int i;
+
+	/*
+	 * AR_TABLE TLV data:
+	 *   - @0 1 byte:  Chan mask (bit set means related channel is concerned)
+	 *   - @1 32bits signed: Min table value in centi dB (MinVal)
+	 *                       ie -300 means -3.0 dB
+	 *   - @5 32bits signed: Step from on item to other item in centi dB (Step)
+	 *                       ie 25 means 0.25 dB)
+	 *   - @9 32bits unsigned: Item index in the table to use for the initial
+	 *                         value
+	 *   - @13 N*4 bytes: Table composed of 4 bytes items.
+	 *                    Each item correspond to an AR filter value.
+	 *
+	 * The conversion from raw value item in the table to/from the value in
+	 * dB is: Raw value at index i <-> (MinVal + i * Step) in centi dB.
+	 */
+
+	/* Check Lng and extract the table size. */
+	if (lng < 13 || ((lng - 13) % 4)) {
+		dev_err(component->dev, "fw AR table lng %u invalid\n", lng);
+		return -EINVAL;
+	}
+	table_size = lng - 13;
+
+	min_val = get_unaligned_be32(data + 1);
+	step = get_unaligned_be32(data + 5);
+	init_index = get_unaligned_be32(data + 9);
+	if (init_index >= (table_size / 4)) {
+		dev_err(component->dev, "fw AR table index %u out of table[%u]\n",
+			init_index, table_size / 4);
+		return -EINVAL;
+	}
+
+	dev_info(component->dev,
+		 "fw AR table: mask %x, min %d, step %d, %u items, tbl[%u] %*phN\n",
+		 *data, min_val, step, table_size / 4, init_index,
+		 4, data + 13 + (init_index * 4));
+
+	BUILD_BUG_ON(sizeof(*table) != 4);
+	table = devm_kzalloc(&peb2466->spi->dev, table_size, GFP_KERNEL);
+	if (!table)
+		return -ENOMEM;
+	memcpy(table, data + 13, table_size);
+
+	mask = *data;
+	BUILD_BUG_ON(ARRAY_SIZE(peb2466_ar_ctrl_names) != ARRAY_SIZE(peb2466->ch));
+	for (i = 0; i < ARRAY_SIZE(peb2466->ch); i++) {
+		if (!(mask & (1 << i)))
+			continue;
+
+		lookup = &peb2466->ch[i].ar_lookup;
+		lookup->table = table;
+		lookup->count = table_size / 4;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AR, 0);
+		if (ret)
+			return ret;
+
+		ret = peb2466_write_buf(peb2466, PEB2466_AR_FILTER(i),
+					lookup->table[init_index], 4);
+		if (ret)
+			return ret;
+
+		ret = regmap_update_bits(peb2466->regmap, PEB2466_CR0(i),
+					 PEB2466_CR0_AR, PEB2466_CR0_AR);
+		if (ret)
+			return ret;
+
+		lkup_ctrl = &peb2466->ch[i].ar_lkup_ctrl;
+		lkup_ctrl->lookup = lookup;
+		lkup_ctrl->reg = PEB2466_AR_FILTER(i);
+		lkup_ctrl->index = init_index;
+
+		ret = peb2466_add_lkup_ctrl(component, lkup_ctrl,
+					    peb2466_ar_ctrl_names[i],
+					    min_val, step);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+struct peb2466_fw_tag_def {
+	u16 tag;
+	u32 lng_min;
+	u32 lng_max;
+	int (*parse)(struct snd_soc_component *component,
+		     u16 tag, u32 lng, const u8 *data);
+};
+
+#define PEB2466_TAG_DEF_LNG_EQ(__tag, __lng, __parse) { \
+	.tag = __tag,		\
+	.lng_min = __lng,	\
+	.lng_max = __lng,	\
+	.parse = __parse,	\
+}
+
+#define PEB2466_TAG_DEF_LNG_MIN(__tag, __lng_min, __parse) { \
+	.tag = __tag,		\
+	.lng_min = __lng_min,	\
+	.lng_max = U32_MAX,	\
+	.parse = __parse,	\
+}
+
+static const struct peb2466_fw_tag_def peb2466_fw_tag_defs[] = {
+	/* TH FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0001, 1 + 3 * 8, peb2466_fw_parse_thfilter),
+	/* IMR1 FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0002, 1 + 2 * 8, peb2466_fw_parse_imr1filter),
+	/* FRX FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0003, 1 + 8, peb2466_fw_parse_frxfilter),
+	/* FRR FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0004, 1 + 8, peb2466_fw_parse_frrfilter),
+	/* AX FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0005, 1 + 4, peb2466_fw_parse_axfilter),
+	/* AR FILTER */
+	PEB2466_TAG_DEF_LNG_EQ(0x0006, 1 + 4, peb2466_fw_parse_arfilter),
+	/* AX TABLE */
+	PEB2466_TAG_DEF_LNG_MIN(0x0105, 1 + 3 * 4, peb2466_fw_parse_axtable),
+	/* AR TABLE */
+	PEB2466_TAG_DEF_LNG_MIN(0x0106, 1 + 3 * 4, peb2466_fw_parse_artable),
+};
+
+static const struct peb2466_fw_tag_def *peb2466_fw_get_tag_def(u16 tag)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(peb2466_fw_tag_defs); i++) {
+		if (peb2466_fw_tag_defs[i].tag == tag)
+			return &peb2466_fw_tag_defs[i];
+	}
+	return NULL;
+}
+
+static int peb2466_fw_parse(struct snd_soc_component *component,
+			    const u8 *data, size_t size)
+{
+	const struct peb2466_fw_tag_def *tag_def;
+	size_t left;
+	const u8 *buf;
+	u16 val16;
+	u16 tag;
+	u32 lng;
+	int ret;
+
+	/*
+	 * Coefficients firmware binary structure (16bits and 32bits are
+	 * big-endian values).
+	 *
+	 * @0, 16bits: Magic (0x2466)
+	 * @2, 16bits: Version (0x0100 for version 1.0)
+	 * @4, 2+4+N bytes: TLV block
+	 * @4+(2+4+N) bytes: Next TLV block
+	 * ...
+	 *
+	 * Detail of a TLV block:
+	 *   @0, 16bits: Tag
+	 *   @2, 32bits: Lng
+	 *   @6, lng bytes: Data
+	 *
+	 * The detail the Data for a given TLV Tag is provided in the related
+	 * parser.
+	 */
+
+	left = size;
+	buf = data;
+
+	if (left < 4) {
+		dev_err(component->dev, "fw size %zu, exp at least 4\n", left);
+		return -EINVAL;
+	}
+
+	/* Check magic */
+	val16 = get_unaligned_be16(buf);
+	if (val16 != 0x2466) {
+		dev_err(component->dev, "fw magic 0x%04x exp 0x2466\n", val16);
+		return -EINVAL;
+	}
+	buf += 2;
+	left -= 2;
+
+	/* Check version */
+	val16 = get_unaligned_be16(buf);
+	if (val16 != 0x0100) {
+		dev_err(component->dev, "fw magic 0x%04x exp 0x0100\n", val16);
+		return -EINVAL;
+	}
+	buf += 2;
+	left -= 2;
+
+	while (left) {
+		if (left < 6) {
+			dev_err(component->dev, "fw %td/%zu left %zu, exp at least 6\n",
+				buf - data, size, left);
+			return -EINVAL;
+		}
+		/* Check tag and lng */
+		tag = get_unaligned_be16(buf);
+		lng = get_unaligned_be32(buf + 2);
+		tag_def = peb2466_fw_get_tag_def(tag);
+		if (!tag_def) {
+			dev_err(component->dev, "fw %td/%zu tag 0x%04x unknown\n",
+				buf - data, size, tag);
+			return -EINVAL;
+		}
+		if (lng < tag_def->lng_min || lng > tag_def->lng_max) {
+			dev_err(component->dev, "fw %td/%zu tag 0x%04x lng %u, exp [%u;%u]\n",
+				buf - data, size, tag, lng, tag_def->lng_min, tag_def->lng_max);
+			return -EINVAL;
+		}
+		buf += 6;
+		left -= 6;
+		if (left < lng) {
+			dev_err(component->dev, "fw %td/%zu tag 0x%04x lng %u, left %zu\n",
+				buf - data, size, tag, lng, left);
+			return -EINVAL;
+		}
+
+		/* TLV block is valid -> parse the data part */
+		ret = tag_def->parse(component, tag, lng, buf);
+		if (ret) {
+			dev_err(component->dev, "fw %td/%zu tag 0x%04x lng %u parse failed\n",
+				buf - data, size, tag, lng);
+			return ret;
+		}
+
+		buf += lng;
+		left -= lng;
+	}
+	return 0;
+}
+
+static int peb2466_load_coeffs(struct snd_soc_component *component, const char *fw_name)
+{
+	const struct firmware *fw;
+	int ret;
+
+	ret = request_firmware(&fw, fw_name, component->dev);
+	if (ret)
+		return ret;
+
+	ret = peb2466_fw_parse(component, fw->data, fw->size);
+	release_firmware(fw);
+
+	return ret;
+}
+
+static int peb2466_component_probe(struct snd_soc_component *component)
+{
+	struct peb2466 *peb2466 = snd_soc_component_get_drvdata(component);
+	const char *firmware_name;
+	int ret;
+
+	/* reset peb2466 audio part */
+	ret = peb2466_reset_audio(peb2466);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_string(peb2466->spi->dev.of_node,
+				      "firmware-name", &firmware_name);
+	if (ret)
+		return (ret == -EINVAL) ? 0 : ret;
+
+	return peb2466_load_coeffs(component, firmware_name);
+}
+
+static const struct snd_soc_component_driver peb2466_component_driver = {
+	.probe			= peb2466_component_probe,
+	.controls		= peb2466_controls,
+	.num_controls		= ARRAY_SIZE(peb2466_controls),
+	.dapm_widgets		= peb2466_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(peb2466_dapm_widgets),
+	.dapm_routes		= peb2466_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(peb2466_dapm_routes),
+	.endianness		= 1,
+};
+
+/*
+ * The mapping used for the relationship between the gpio offset and the
+ * physical pin is the following:
+ *
+ * offset     pin
+ *      0     SI1_0
+ *      1     SI1_1
+ *      2     SI2_0
+ *      3     SI2_1
+ *      4     SI3_0
+ *      5     SI3_1
+ *      6     SI4_0
+ *      7     SI4_1
+ *      8     SO1_0
+ *      9     SO1_1
+ *     10     SO2_0
+ *     11     SO2_1
+ *     12     SO3_0
+ *     13     SO3_1
+ *     14     SO4_0
+ *     15     SO4_1
+ *     16     SB1_0
+ *     17     SB1_1
+ *     18     SB2_0
+ *     19     SB2_1
+ *     20     SB3_0
+ *     21     SB3_1
+ *     22     SB4_0
+ *     23     SB4_1
+ *     24     SB1_2
+ *     25     SB2_2
+ *     26     SB3_2
+ *     27     SB4_2
+ */
+
+static int peb2466_chip_gpio_offset_to_data_regmask(unsigned int offset,
+						    unsigned int *xr_reg,
+						    unsigned int *mask)
+{
+	if (offset < 16) {
+		/*
+		 * SIx_{0,1} and SOx_{0,1}
+		 *   Read accesses read SIx_{0,1} values
+		 *   Write accesses write SOx_{0,1} values
+		 */
+		*xr_reg = PEB2466_XR0;
+		*mask = (1 << (offset % 8));
+		return 0;
+	}
+	if (offset < 24) {
+		/* SBx_{0,1} */
+		*xr_reg = PEB2466_XR1;
+		*mask = (1 << (offset - 16));
+		return 0;
+	}
+	if (offset < 28) {
+		/* SBx_2 */
+		*xr_reg = PEB2466_XR3;
+		*mask = (1 << (offset - 24 + 4));
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int peb2466_chip_gpio_offset_to_dir_regmask(unsigned int offset,
+						   unsigned int *xr_reg,
+						   unsigned int *mask)
+{
+	if (offset < 16) {
+		/* Direction cannot be changed for these GPIOs */
+		return -EINVAL;
+	}
+	if (offset < 24) {
+		*xr_reg = PEB2466_XR2;
+		*mask = (1 << (offset - 16));
+		return 0;
+	}
+	if (offset < 28) {
+		*xr_reg = PEB2466_XR3;
+		*mask = (1 << (offset - 24));
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static unsigned int *peb2466_chip_gpio_get_cache(struct peb2466 *peb2466,
+						 unsigned int xr_reg)
+{
+	unsigned int *cache;
+
+	switch (xr_reg) {
+	case PEB2466_XR0:
+		cache = &peb2466->gpio.cache.xr0;
+		break;
+	case PEB2466_XR1:
+		cache = &peb2466->gpio.cache.xr1;
+		break;
+	case PEB2466_XR2:
+		cache = &peb2466->gpio.cache.xr2;
+		break;
+	case PEB2466_XR3:
+		cache = &peb2466->gpio.cache.xr3;
+		break;
+	default:
+		cache = NULL;
+		break;
+	}
+	return cache;
+}
+
+static int peb2466_chip_gpio_update_bits(struct peb2466 *peb2466, unsigned int xr_reg,
+					 unsigned int mask, unsigned int val)
+{
+	unsigned int tmp;
+	unsigned int *cache;
+	int ret;
+
+	/*
+	 * Read and write accesses use different peb2466 internal signals (input
+	 * signals on reads and output signals on writes). regmap_update_bits
+	 * cannot be used to read/modify/write the value.
+	 * So, a specific cache value is used.
+	 */
+
+	mutex_lock(&peb2466->gpio.lock);
+
+	cache = peb2466_chip_gpio_get_cache(peb2466, xr_reg);
+	if (!cache) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	tmp = *cache;
+	tmp &= ~mask;
+	tmp |= val;
+
+	ret = regmap_write(peb2466->regmap, xr_reg, tmp);
+	if (ret)
+		goto end;
+
+	*cache = tmp;
+	ret = 0;
+
+end:
+	mutex_unlock(&peb2466->gpio.lock);
+	return ret;
+}
+
+static void peb2466_chip_gpio_set(struct gpio_chip *c, unsigned int offset, int val)
+{
+	struct peb2466 *peb2466 = gpiochip_get_data(c);
+	unsigned int xr_reg;
+	unsigned int mask;
+	int ret;
+
+	if (offset < 8) {
+		/*
+		 * SIx_{0,1} signals cannot be set and writing the related
+		 * register will change the SOx_{0,1} signals
+		 */
+		dev_warn(&peb2466->spi->dev, "cannot set gpio %d (read-only)\n",
+			 offset);
+		return;
+	}
+
+	ret = peb2466_chip_gpio_offset_to_data_regmask(offset, &xr_reg, &mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "cannot set gpio %d (%d)\n",
+			offset, ret);
+		return;
+	}
+
+	ret = peb2466_chip_gpio_update_bits(peb2466, xr_reg, mask, val ? mask : 0);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "set gpio %d (0x%x, 0x%x) failed (%d)\n",
+			offset, xr_reg, mask, ret);
+	}
+}
+
+static int peb2466_chip_gpio_get(struct gpio_chip *c, unsigned int offset)
+{
+	struct peb2466 *peb2466 = gpiochip_get_data(c);
+	bool use_cache = false;
+	unsigned int *cache;
+	unsigned int xr_reg;
+	unsigned int mask;
+	unsigned int val;
+	int ret;
+
+	if (offset >= 8 && offset < 16) {
+		/*
+		 * SOx_{0,1} signals cannot be read. Reading the related
+		 * register will read the SIx_{0,1} signals.
+		 * Use the cache to get value;
+		 */
+		use_cache = true;
+	}
+
+	ret = peb2466_chip_gpio_offset_to_data_regmask(offset, &xr_reg, &mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "cannot get gpio %d (%d)\n",
+			offset, ret);
+		return -EINVAL;
+	}
+
+	if (use_cache) {
+		cache = peb2466_chip_gpio_get_cache(peb2466, xr_reg);
+		if (!cache)
+			return -EINVAL;
+		val = *cache;
+	} else {
+		ret = regmap_read(peb2466->regmap, xr_reg, &val);
+		if (ret) {
+			dev_err(&peb2466->spi->dev, "get gpio %d (0x%x, 0x%x) failed (%d)\n",
+				offset, xr_reg, mask, ret);
+			return ret;
+		}
+	}
+
+	return !!(val & mask);
+}
+
+static int peb2466_chip_get_direction(struct gpio_chip *c, unsigned int offset)
+{
+	struct peb2466 *peb2466 = gpiochip_get_data(c);
+	unsigned int xr_reg;
+	unsigned int mask;
+	unsigned int val;
+	int ret;
+
+	if (offset < 8) {
+		/* SIx_{0,1} */
+		return GPIO_LINE_DIRECTION_IN;
+	}
+	if (offset < 16) {
+		/* SOx_{0,1} */
+		return GPIO_LINE_DIRECTION_OUT;
+	}
+
+	ret = peb2466_chip_gpio_offset_to_dir_regmask(offset, &xr_reg, &mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "cannot get gpio %d direction (%d)\n",
+			offset, ret);
+		return ret;
+	}
+
+	ret = regmap_read(peb2466->regmap, xr_reg, &val);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "get dir gpio %d (0x%x, 0x%x) failed (%d)\n",
+			offset, xr_reg, mask, ret);
+		return ret;
+	}
+
+	return val & mask ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
+}
+
+static int peb2466_chip_direction_input(struct gpio_chip *c, unsigned int offset)
+{
+	struct peb2466 *peb2466 = gpiochip_get_data(c);
+	unsigned int xr_reg;
+	unsigned int mask;
+	int ret;
+
+	if (offset < 8) {
+		/* SIx_{0,1} */
+		return 0;
+	}
+	if (offset < 16) {
+		/* SOx_{0,1} */
+		return -EINVAL;
+	};
+
+	ret = peb2466_chip_gpio_offset_to_dir_regmask(offset, &xr_reg, &mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "cannot set gpio %d direction (%d)\n",
+			offset, ret);
+		return ret;
+	}
+
+	ret = peb2466_chip_gpio_update_bits(peb2466, xr_reg, mask, 0);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "Set dir in gpio %d (0x%x, 0x%x) failed (%d)\n",
+			offset, xr_reg, mask, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int peb2466_chip_direction_output(struct gpio_chip *c, unsigned int offset, int val)
+{
+	struct peb2466 *peb2466 = gpiochip_get_data(c);
+	unsigned int xr_reg;
+	unsigned int mask;
+	int ret;
+
+	if (offset < 8) {
+		/* SIx_{0,1} */
+		return -EINVAL;
+	}
+
+	peb2466_chip_gpio_set(c, offset, val);
+
+	if (offset < 16) {
+		/* SOx_{0,1} */
+		return 0;
+	};
+
+	ret = peb2466_chip_gpio_offset_to_dir_regmask(offset, &xr_reg, &mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "cannot set gpio %d direction (%d)\n",
+			offset, ret);
+		return ret;
+	}
+
+	ret = peb2466_chip_gpio_update_bits(peb2466, xr_reg, mask, mask);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "Set dir in gpio %d (0x%x, 0x%x) failed (%d)\n",
+			offset, xr_reg, mask, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int peb2466_reset_gpio(struct peb2466 *peb2466)
+{
+	static const struct reg_sequence reg_reset[] = {
+		/* Output pins at 0, input/output pins as input */
+		{  .reg = PEB2466_XR0, .def = 0 },
+		{  .reg = PEB2466_XR1, .def = 0 },
+		{  .reg = PEB2466_XR2, .def = 0 },
+		{  .reg = PEB2466_XR3, .def = 0 },
+	};
+
+	peb2466->gpio.cache.xr0 = 0;
+	peb2466->gpio.cache.xr1 = 0;
+	peb2466->gpio.cache.xr2 = 0;
+	peb2466->gpio.cache.xr3 = 0;
+
+	return regmap_multi_reg_write(peb2466->regmap, reg_reset, ARRAY_SIZE(reg_reset));
+}
+
+static int peb2466_gpio_init(struct peb2466 *peb2466)
+{
+	int ret;
+
+	mutex_init(&peb2466->gpio.lock);
+
+	ret = peb2466_reset_gpio(peb2466);
+	if (ret)
+		return ret;
+
+	peb2466->gpio.gpio_chip.owner = THIS_MODULE;
+	peb2466->gpio.gpio_chip.label = dev_name(&peb2466->spi->dev);
+	peb2466->gpio.gpio_chip.parent = &peb2466->spi->dev;
+	peb2466->gpio.gpio_chip.base = -1;
+	peb2466->gpio.gpio_chip.ngpio = 28;
+	peb2466->gpio.gpio_chip.get_direction = peb2466_chip_get_direction;
+	peb2466->gpio.gpio_chip.direction_input = peb2466_chip_direction_input;
+	peb2466->gpio.gpio_chip.direction_output = peb2466_chip_direction_output;
+	peb2466->gpio.gpio_chip.get = peb2466_chip_gpio_get;
+	peb2466->gpio.gpio_chip.set = peb2466_chip_gpio_set;
+	peb2466->gpio.gpio_chip.can_sleep = true;
+
+	return devm_gpiochip_add_data(&peb2466->spi->dev, &peb2466->gpio.gpio_chip,
+				      peb2466);
+}
+
+static int peb2466_spi_probe(struct spi_device *spi)
+{
+	struct peb2466 *peb2466;
+	unsigned long mclk_rate;
+	int ret;
+	u8 xr5;
+
+	spi->bits_per_word = 8;
+	ret = spi_setup(spi);
+	if (ret < 0)
+		return ret;
+
+	peb2466 = devm_kzalloc(&spi->dev, sizeof(*peb2466), GFP_KERNEL);
+	if (!peb2466)
+		return -ENOMEM;
+
+	peb2466->spi = spi;
+
+	peb2466->regmap = devm_regmap_init(&peb2466->spi->dev, NULL, peb2466,
+					   &peb2466_regmap_config);
+	if (IS_ERR(peb2466->regmap))
+		return PTR_ERR(peb2466->regmap);
+
+	peb2466->reset_gpio = devm_gpiod_get_optional(&peb2466->spi->dev,
+						      "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(peb2466->reset_gpio))
+		return PTR_ERR(peb2466->reset_gpio);
+
+	peb2466->mclk = devm_clk_get(&peb2466->spi->dev, "mclk");
+	if (IS_ERR(peb2466->mclk))
+		return PTR_ERR(peb2466->mclk);
+	ret = clk_prepare_enable(peb2466->mclk);
+	if (ret)
+		return ret;
+
+	if (peb2466->reset_gpio) {
+		gpiod_set_value_cansleep(peb2466->reset_gpio, 1);
+		udelay(4);
+		gpiod_set_value_cansleep(peb2466->reset_gpio, 0);
+		udelay(4);
+	}
+
+	spi_set_drvdata(spi, peb2466);
+
+	mclk_rate = clk_get_rate(peb2466->mclk);
+	switch (mclk_rate) {
+	case 1536000:
+		xr5 = PEB2466_XR5_MCLK_1536;
+		break;
+	case 2048000:
+		xr5 = PEB2466_XR5_MCLK_2048;
+		break;
+	case 4096000:
+		xr5 = PEB2466_XR5_MCLK_4096;
+		break;
+	case 8192000:
+		xr5 = PEB2466_XR5_MCLK_8192;
+		break;
+	default:
+		dev_err(&peb2466->spi->dev, "Unsupported clock rate %lu\n",
+			mclk_rate);
+		ret = -EINVAL;
+		goto failed;
+	}
+	ret = regmap_write(peb2466->regmap, PEB2466_XR5, xr5);
+	if (ret) {
+		dev_err(&peb2466->spi->dev, "Setting MCLK failed (%d)\n", ret);
+		goto failed;
+	}
+
+	ret = devm_snd_soc_register_component(&spi->dev, &peb2466_component_driver,
+					      &peb2466_dai_driver, 1);
+	if (ret)
+		goto failed;
+
+	if (IS_ENABLED(CONFIG_GPIOLIB)) {
+		ret = peb2466_gpio_init(peb2466);
+		if (ret)
+			goto failed;
+	}
+
+	return 0;
+
+failed:
+	clk_disable_unprepare(peb2466->mclk);
+	return ret;
+}
+
+static void peb2466_spi_remove(struct spi_device *spi)
+{
+	struct peb2466 *peb2466 = spi_get_drvdata(spi);
+
+	clk_disable_unprepare(peb2466->mclk);
+}
+
+static const struct of_device_id peb2466_of_match[] = {
+	{ .compatible = "infineon,peb2466", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, peb2466_of_match);
+
+static const struct spi_device_id peb2466_id_table[] = {
+	{ "peb2466", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, peb2466_id_table);
+
+static struct spi_driver peb2466_spi_driver = {
+	.driver  = {
+		.name   = "peb2466",
+		.of_match_table = peb2466_of_match,
+	},
+	.id_table = peb2466_id_table,
+	.probe  = peb2466_spi_probe,
+	.remove = peb2466_spi_remove,
+};
+
+module_spi_driver(peb2466_spi_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("PEB2466 ALSA SoC driver");
+MODULE_LICENSE("GPL");