openwrt/target/linux/brcm2708/patches-4.14/950-0281-Drivers-for-Allo-Katana-DAC.patch

From 87d450d98ef1f69dd6f5255c3b7e665c130935ea Mon Sep 17 00:00:00 2001
From: allocom <sparky-dev@allo.com>
Date: Thu, 19 Apr 2018 12:12:26 +0530
Subject: [PATCH 281/454] Drivers for Allo Katana DAC

---
 arch/arm/boot/dts/overlays/Makefile           |   1 +
 arch/arm/boot/dts/overlays/README             |   6 +
 .../allo-katana-dac-audio-overlay.dts         |  46 +++
 arch/arm/configs/bcm2709_defconfig            |   1 +
 arch/arm/configs/bcmrpi_defconfig             |   1 +
 sound/soc/bcm/Kconfig                         |   7 +
 sound/soc/bcm/Makefile                        |   2 +
 sound/soc/bcm/allo-katana-dac.c               | 105 ++++++
 sound/soc/codecs/Kconfig                      |  10 +
 sound/soc/codecs/Makefile                     |   4 +
 sound/soc/codecs/sabre-ess-i2c.c              |  69 ++++
 sound/soc/codecs/sabre-ess.c                  | 300 ++++++++++++++++++
 sound/soc/codecs/sabre-ess.h                  |  62 ++++
 13 files changed, 614 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/allo-katana-dac-audio-overlay.dts
 create mode 100644 sound/soc/bcm/allo-katana-dac.c
 create mode 100644 sound/soc/codecs/sabre-ess-i2c.c
 create mode 100644 sound/soc/codecs/sabre-ess.c
 create mode 100644 sound/soc/codecs/sabre-ess.h

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -9,6 +9,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	akkordion-iqdacplus.dtbo \
 	allo-boss-dac-pcm512x-audio.dtbo \
 	allo-digione.dtbo \
+	allo-katana-dac-audio.dtbo \
 	allo-piano-dac-pcm512x-audio.dtbo \
 	allo-piano-dac-plus-pcm512x-audio.dtbo \
 	applepi-dac.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -317,6 +317,12 @@ Load:   dtoverlay=allo-digione
 Params: <None>
 
 
+Name:   allo-katana
+Info:   Configures the Allo Katana audio card
+Load:   dtoverlay=allo-katana-dac-audio
+Params: <None>
+
+
 Name:   allo-piano-dac-pcm512x-audio
 Info:   Configures the Allo Piano DAC (2.0/2.1) audio cards.
         (NB. This initial support is for 2.0 channel audio ONLY! ie. stereo.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/allo-katana-dac-audio-overlay.dts
@@ -0,0 +1,46 @@
+/*
+ * Definitions for Allo Katana DAC boards
+ *
+ * NB. The Katana DAC board contains SABER DAC.
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			sabre-ess@30 {
+				#sound-dai-cells = <0>;
+				compatible = "saber,sabre-ess";
+				reg = <0x30>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&sound>;
+		katana_dac: __overlay__ {
+			compatible = "allo,katana-dac";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+};
+
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -894,6 +894,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS=m
 CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
+CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_ADAU1701=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -887,6 +887,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS=m
 CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
+CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_ADAU1701=m
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -175,6 +175,13 @@ config SND_BCM2708_SOC_ALLO_DIGIONE
 	help
 	  Say Y or M if you want to add support for Allo DigiOne.
 
+config SND_BCM2708_SOC_ALLO_KATANA_DAC
+	tristate "Support for Allo Katana DAC"
+	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+	select SND_SOC_SABRE_ESS_I2C
+	help
+	  Say Y or M if you want to add support for Allo Katana DAC.
+
 config SND_BCM2708_SOC_FE_PI_AUDIO
 	tristate "Support for Fe-Pi-Audio"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -34,6 +34,7 @@ snd-soc-allo-boss-dac-objs := allo-boss-
 snd-soc-allo-piano-dac-objs := allo-piano-dac.o
 snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
 snd-soc-allo-digione-objs := allo-digione.o
+snd-soc-allo-katana-dac-objs := allo-katana-dac.o
 snd-soc-pisound-objs := pisound.o
 snd-soc-fe-pi-audio-objs := fe-pi-audio.o
 
@@ -60,5 +61,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_D
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
 obj-$(CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE) += snd-soc-allo-digione.o
+obj-$(CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC) += snd-soc-allo-katana-dac.o
 obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
 obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
--- /dev/null
+++ b/sound/soc/bcm/allo-katana-dac.c
@@ -0,0 +1,105 @@
+/*
+ * ASoC Driver for KATANA DAC
+ *
+ * Author:	Jaikumar <jaikumar@cem-solutions.net>
+ *		Copyright 2018
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+static struct snd_soc_dai_link snd_allo_katana_dac_dai[] = {
+{
+	.name		= "KATANA DAC",
+	//.stream_name	= "KATANA DAC HiFi [Master]",
+	.stream_name	= "KATANA DAC",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	//.codec_dai_name	= "es9038q2m-hifi",
+	.codec_dai_name	= "sabre-ess",
+	.platform_name	= "bcm2708-i2s.0",
+	//.codec_name	= "es9038q2m.1-0030",
+	.codec_name	= "sabre-ess.1-0030",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S |
+		SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBM_CFM,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_allo_katana_dac = {
+	.name         = "snd_allo_katana_dac",
+	.owner        = THIS_MODULE,
+	.dai_link     = snd_allo_katana_dac_dai,
+	.num_links    = ARRAY_SIZE(snd_allo_katana_dac_dai),
+};
+
+static int snd_allo_katana_dac_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_allo_katana_dac.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+		struct device_node *i2s_node;
+		struct snd_soc_dai_link *dai = &snd_allo_katana_dac_dai[0];
+
+		i2s_node = of_parse_phandle(pdev->dev.of_node,
+				"i2s-controller", 0);
+
+		if (i2s_node) {
+			dai->cpu_dai_name = NULL;
+			dai->cpu_of_node = i2s_node;
+			dai->platform_name = NULL;
+			dai->platform_of_node = i2s_node;
+		}
+	}
+
+	ret = snd_soc_register_card(&snd_allo_katana_dac);
+	if (ret && ret != -EPROBE_DEFER)
+		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+					ret);
+
+	return ret;
+}
+
+static int snd_allo_katana_dac_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_allo_katana_dac);
+}
+
+static const struct of_device_id snd_allo_katana_dac_of_match[] = {
+	{ .compatible = "allo,katana-dac", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_allo_katana_dac_of_match);
+
+static struct platform_driver snd_allo_katana_dac_driver = {
+	.driver = {
+		.name   = "snd-katana-dac",
+		.owner  = THIS_MODULE,
+		.of_match_table = snd_allo_katana_dac_of_match,
+	},
+	.probe          = snd_allo_katana_dac_probe,
+	.remove         = snd_allo_katana_dac_remove,
+};
+
+module_platform_driver(snd_allo_katana_dac_driver);
+
+MODULE_AUTHOR("Jaikumar <jaikumar@cem-solutions.net>");
+MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Katana DAC");
+MODULE_LICENSE("GPL v2");
+
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -77,6 +77,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_ES8328_SPI if SPI_MASTER
 	select SND_SOC_ES8328_I2C if I2C
 	select SND_SOC_ES7134
+	select SND_SOC_SABRE_ESS_I2C if I2C
 	select SND_SOC_GTM601
 	select SND_SOC_HDAC_HDMI
 	select SND_SOC_ICS43432
@@ -1186,4 +1187,13 @@ config SND_SOC_TPA6130A2
 	tristate "Texas Instruments TPA6130A2 headphone amplifier"
 	depends on I2C
 
+config SND_SOC_SABRE_ESS
+	tristate
+
+config SND_SOC_SABRE_ESS_I2C
+	tristate "Sabre SABRE ESS CODEC - I2C"
+	depends on I2C
+	select SND_SOC_SABRE_ESS
+	select REGMAP_I2C
+
 endmenu
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -71,6 +71,8 @@ snd-soc-es8316-objs := es8316.o
 snd-soc-es8328-objs := es8328.o
 snd-soc-es8328-i2c-objs := es8328-i2c.o
 snd-soc-es8328-spi-objs := es8328-spi.o
+snd-soc-sabre-ess-objs := sabre-ess.o
+snd-soc-sabre-ess-i2c-objs := sabre-ess-i2c.o
 snd-soc-gtm601-objs := gtm601.o
 snd-soc-hdac-hdmi-objs := hdac_hdmi.o
 snd-soc-ics43432-objs := ics43432.o
@@ -313,6 +315,8 @@ obj-$(CONFIG_SND_SOC_ES8316)    += snd-s
 obj-$(CONFIG_SND_SOC_ES8328)	+= snd-soc-es8328.o
 obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
 obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
+obj-$(CONFIG_SND_SOC_SABRE_ESS) += snd-soc-sabre-ess.o
+obj-$(CONFIG_SND_SOC_SABRE_ESS_I2C) += snd-soc-sabre-ess-i2c.o
 obj-$(CONFIG_SND_SOC_GTM601)    += snd-soc-gtm601.o
 obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o
 obj-$(CONFIG_SND_SOC_ICS43432)	+= snd-soc-ics43432.o
--- /dev/null
+++ b/sound/soc/codecs/sabre-ess-i2c.c
@@ -0,0 +1,69 @@
+/*
+ * Driver for the SABRE ESS CODECs
+ *
+ * Author: Jaikumar <jaikumar@cem-solutions.net>	
+ *		Copyright 2018
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+
+#include "sabre-ess.h"
+
+static int sabre_ess_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	struct regmap_config config = sabre_ess_regmap;
+
+	regmap = devm_regmap_init_i2c(i2c, &config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return sabre_ess_probe(&i2c->dev, regmap);
+}
+
+static int sabre_ess_i2c_remove(struct i2c_client *i2c)
+{
+	sabre_ess_remove(&i2c->dev);
+	return 0;
+}
+
+static const struct i2c_device_id sabre_ess_i2c_id[] = {
+	{ "sabre-ess", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, sabre_ess_i2c_id);
+
+static const struct of_device_id sabre_ess_of_match[] = {
+	{ .compatible = "saber,sabre-ess", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sabre_ess_of_match);
+
+static struct i2c_driver sabre_ess_i2c_driver = {
+	.probe 		= sabre_ess_i2c_probe,
+	.remove 	= sabre_ess_i2c_remove,
+	.id_table	= sabre_ess_i2c_id,
+	.driver		= {
+		.name	= "sabre-ess",
+		.of_match_table = sabre_ess_of_match,
+	},
+};
+
+module_i2c_driver(sabre_ess_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC SABRE ESS codec driver - I2C");
+MODULE_AUTHOR("Jaikumar <jaikumar@cem-solutions.net>");
+MODULE_LICENSE("GPL v2");
+
--- /dev/null
+++ b/sound/soc/codecs/sabre-ess.c
@@ -0,0 +1,300 @@
+/*
+ * Driver for the SABRE ESS CODEC
+ *
+ * Author: Jaikumar <jaikumar@cem-solutions.net>
+ *		Copyright 2018
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gcd.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+
+#include "sabre-ess.h"
+
+struct sabre_ess_priv {
+	struct regmap *regmap;
+	int fmt;
+};
+
+static const struct reg_default sabre_ess_reg_defaults[] = {
+	{ SABRE_ESS_RESET,			0x00 },
+	{ SABRE_ESS_VOLUME_1,		0xF0 },
+	{ SABRE_ESS_VOLUME_2,		0xF0 },
+	{ SABRE_ESS_MUTE,			0x00 },
+	{ SABRE_ESS_DSP_PROGRAM,	0x04 },
+	{ SABRE_ESS_DEEMPHASIS,		0x00 },
+	{ SABRE_ESS_DOP,			0x01 },
+	{ SABRE_ESS_FORMAT,			0xb4 },
+};
+
+static const char * const sabre_ess_dsp_program_texts[] = {
+	"Linear Phase Fast Roll-off Filter",
+	"Linear Phase Slow Roll-off Filter",
+	"Minimum Phase Fast Roll-off Filter",
+	"Minimum Phase Slow Roll-off Filter",
+	"Apodizing Fast Roll-off Filter",
+	"Corrected Minimum Phase Fast Roll-off Filter",
+	"Brick Wall Filter",
+};
+
+static const unsigned int sabre_ess_dsp_program_values[] = {
+	0,
+	1,
+	2,
+	3,
+	4,
+	6,
+	7,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(sabre_ess_dsp_program,
+				  SABRE_ESS_DSP_PROGRAM, 0, 0x07,
+				  sabre_ess_dsp_program_texts,
+				  sabre_ess_dsp_program_values);
+
+static const char * const sabre_ess_deemphasis_texts[] = {
+	"Bypass",
+	"32kHz",
+	"44.1kHz",
+	"48kHz",
+};
+
+static const unsigned int sabre_ess_deemphasis_values[] = {
+	0,
+	1,
+	2,
+	3,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(sabre_ess_deemphasis,
+				  SABRE_ESS_DEEMPHASIS, 0, 0x03,
+				  sabre_ess_deemphasis_texts,
+				  sabre_ess_deemphasis_values);
+
+static const SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(master_tlv, -12700, 0);
+
+static const struct snd_kcontrol_new sabre_ess_controls[] = {
+	SOC_DOUBLE_R_TLV("Master Playback Volume", SABRE_ESS_VOLUME_1,
+			SABRE_ESS_VOLUME_2, 0, 255, 1, master_tlv),
+	SOC_DOUBLE("Master Playback Switch", SABRE_ESS_MUTE, 0, 0, 1, 1),
+	SOC_ENUM("DSP Program Route", sabre_ess_dsp_program),
+	SOC_ENUM("Deemphasis Route", sabre_ess_deemphasis),
+	SOC_SINGLE("DoP Playback Switch", SABRE_ESS_DOP, 0, 1, 1)
+};
+
+static bool sabre_ess_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SABRE_ESS_CHIP_ID_REG:
+		return true;
+	default:
+		return reg < 0xff;
+	}
+}
+
+static int sabre_ess_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct sabre_ess_priv *sabre_ess = snd_soc_codec_get_drvdata(codec);
+	int fmt = 0;
+	int ret;
+
+	dev_dbg(codec->dev, "hw_params %u Hz, %u channels\n",
+			params_rate(params),
+			params_channels(params));
+
+	switch (sabre_ess->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM: // master
+		if (params_channels(params) == 2)
+			fmt = SABRE_ESS_CHAN_STEREO;
+		else
+			fmt = SABRE_ESS_CHAN_MONO;
+
+		switch (params_width(params)) {
+		case 16:
+			fmt |= SABRE_ESS_ALEN_16;
+			break;
+		case 24:
+			fmt |= SABRE_ESS_ALEN_24;
+			break;
+		case 32:
+			fmt |= SABRE_ESS_ALEN_32;
+			break;
+		default:
+			dev_err(codec->dev, "Bad frame size: %d\n",
+					params_width(params));
+			return -EINVAL;
+		}
+
+		switch (params_rate(params)) {
+		case 44100:
+			fmt |= SABRE_ESS_RATE_44100;
+			break;
+		case 48000:
+			fmt |= SABRE_ESS_RATE_48000;
+			break;
+		case 88200:
+			fmt |= SABRE_ESS_RATE_88200;
+			break;
+		case 96000:
+			fmt |= SABRE_ESS_RATE_96000;
+			break;
+		case 176400:
+			fmt |= SABRE_ESS_RATE_176400;
+			break;
+		case 192000:
+			fmt |= SABRE_ESS_RATE_192000;
+			break;
+		case 352800:
+			fmt |= SABRE_ESS_RATE_352800;
+			break;
+		case 384000:
+			fmt |= SABRE_ESS_RATE_384000;
+			break;
+		default:
+			dev_err(codec->dev, "Bad sample rate: %d\n",
+					params_rate(params));
+			return -EINVAL;
+		}
+
+		ret = regmap_write(sabre_ess->regmap, SABRE_ESS_FORMAT, fmt);
+		if (ret != 0) {
+			dev_err(codec->dev, "Failed to set format: %d\n", ret);
+			return ret;
+		}
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int sabre_ess_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct sabre_ess_priv *sabre_ess = snd_soc_codec_get_drvdata(codec);
+
+	sabre_ess->fmt = fmt;
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops sabre_ess_dai_ops = {
+	.hw_params = sabre_ess_hw_params,
+	.set_fmt = sabre_ess_set_fmt,
+};
+
+static struct snd_soc_dai_driver sabre_ess_dai = {
+	.name = "sabre-ess",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.rate_min = 44100,
+		.rate_max = 384000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE |
+			SNDRV_PCM_FMTBIT_S32_LE
+	},
+	.ops = &sabre_ess_dai_ops,
+};
+
+static struct snd_soc_codec_driver sabre_ess_codec_driver = {
+	.idle_bias_off = false,
+
+	.component_driver = {
+		.controls		= sabre_ess_controls,
+		.num_controls	= ARRAY_SIZE(sabre_ess_controls),
+	},
+};
+
+static const struct regmap_range_cfg sabre_ess_range = {
+	.name = "Pages", .range_min = SABRE_ESS_VIRT_BASE,
+	.range_max = SABRE_ESS_MAX_REGISTER,
+	.selector_reg = SABRE_ESS_PAGE,
+	.selector_mask = 0xff,
+	.window_start = 0, .window_len = 0x100,
+};
+
+const struct regmap_config sabre_ess_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.ranges = &sabre_ess_range,
+	.num_ranges = 1,
+
+	.max_register = SABRE_ESS_MAX_REGISTER,
+	.readable_reg = sabre_ess_readable_register,
+	.reg_defaults = sabre_ess_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(sabre_ess_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+};
+EXPORT_SYMBOL_GPL(sabre_ess_regmap);
+
+int sabre_ess_probe(struct device *dev, struct regmap *regmap)
+{
+	struct sabre_ess_priv *sabre_ess;
+	unsigned int chip_id = 0;
+	int ret;
+
+	sabre_ess = devm_kzalloc(dev, sizeof(struct sabre_ess_priv),
+								GFP_KERNEL);
+	if (!sabre_ess)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, sabre_ess);
+	sabre_ess->regmap = regmap;
+
+	ret = regmap_read(regmap, SABRE_ESS_CHIP_ID_REG, &chip_id);
+	if ((ret != 0) || (chip_id != SABRE_ESS_CHIP_ID)) {
+		dev_err(dev, "Failed to read Chip or wrong Chip id: %d\n", ret);
+		return ret;
+	}
+	regmap_update_bits(regmap, SABRE_ESS_RESET, 0x01, 0x01);
+	msleep(10);
+
+	ret = snd_soc_register_codec(dev, &sabre_ess_codec_driver,
+				    &sabre_ess_dai, 1);
+	if (ret != 0) {
+		dev_err(dev, "failed to register codec: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sabre_ess_probe);
+
+void sabre_ess_remove(struct device *dev)
+{
+	snd_soc_unregister_codec(dev);
+	pm_runtime_disable(dev);
+}
+EXPORT_SYMBOL_GPL(sabre_ess_remove);
+
+MODULE_DESCRIPTION("ASoC SABRE ESS codec driver");
+MODULE_AUTHOR("Jaikumar <jaikumar@cem-solutions.net>");
+MODULE_LICENSE("GPL v2");
+
--- /dev/null
+++ b/sound/soc/codecs/sabre-ess.h
@@ -0,0 +1,62 @@
+/*
+ * Driver for the SABRE ESS CODEC
+ *
+ * Author: Jaikumar <jaikumar@cem-solutions.net>
+ *		Copyright 2018
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _SND_SOC_SABRE_ESS_
+#define _SND_SOC_SABRE_ESS_
+
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
+#define SABRE_ESS_CHIP_ID		0x30
+#define SABRE_ESS_VIRT_BASE		0x100
+#define SABRE_ESS_PAGE			0
+
+#define SABRE_ESS_CHIP_ID_REG	(SABRE_ESS_VIRT_BASE + 0)
+#define SABRE_ESS_RESET			(SABRE_ESS_VIRT_BASE + 1)
+#define SABRE_ESS_VOLUME_1		(SABRE_ESS_VIRT_BASE + 2)
+#define SABRE_ESS_VOLUME_2		(SABRE_ESS_VIRT_BASE + 3)
+#define SABRE_ESS_MUTE			(SABRE_ESS_VIRT_BASE + 4)
+#define SABRE_ESS_DSP_PROGRAM	(SABRE_ESS_VIRT_BASE + 5)
+#define SABRE_ESS_DEEMPHASIS	(SABRE_ESS_VIRT_BASE + 6)
+#define SABRE_ESS_DOP			(SABRE_ESS_VIRT_BASE + 7)
+#define SABRE_ESS_FORMAT		(SABRE_ESS_VIRT_BASE + 8)
+#define SABRE_ESS_COMMAND		(SABRE_ESS_VIRT_BASE + 9)
+#define SABRE_ESS_MAX_REGISTER	(SABRE_ESS_VIRT_BASE + 9)
+
+#define SABRE_ESS_FMT			0xff
+#define SABRE_ESS_CHAN_MONO		0x00
+#define SABRE_ESS_CHAN_STEREO	0x80
+#define SABRE_ESS_ALEN_16		0x10
+#define SABRE_ESS_ALEN_24		0x20
+#define SABRE_ESS_ALEN_32		0x30
+#define SABRE_ESS_RATE_11025	0x01
+#define SABRE_ESS_RATE_22050	0x02
+#define SABRE_ESS_RATE_32000	0x03
+#define SABRE_ESS_RATE_44100	0x04
+#define SABRE_ESS_RATE_48000	0x05
+#define SABRE_ESS_RATE_88200	0x06
+#define SABRE_ESS_RATE_96000	0x07
+#define SABRE_ESS_RATE_176400	0x08
+#define SABRE_ESS_RATE_192000	0x09
+#define SABRE_ESS_RATE_352800	0x0a
+#define SABRE_ESS_RATE_384000	0x0b
+
+extern const struct regmap_config sabre_ess_regmap;
+
+int sabre_ess_probe(struct device *dev, struct regmap *regmap);
+void sabre_ess_remove(struct device *dev);
+
+#endif /* _SND_SOC_SABRE_ESS_ */