ASoC: Some issues about loongson i2s

Merge series from Binbin Zhou <[e-mail]>:

This patch set is mainly about Loongson i2s related issues.

Please allow me to briefly explain this patch set:
Patch 1-2: Add ES8323 codec required on Loongson-2K2000
Patch 3-4: Add uda1342 codec required on Loongson-2K1000
Patch 5: Fix the problem of unable to detect codec under FDT system.
Patch 6-7: Add Loongson i2s platform device support

Documentation/devicetree/bindings/sound/everest,es8316.yaml

···
 $id: http://devicetree.org/schemas/sound/everest,es8316.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Everest ES8311 and ES8316 audio CODECs
+title: Everest ES8311, ES8316 and ES8323 audio CODECs
 
 maintainers:
   - Daniel Drake <[e-mail]>
   - Katsuhiro Suzuki <[e-mail]>
   - Matteo Martelli <[e-mail]>
+  - Binbin Zhou <[e-mail]>
 
 allOf:
   - $ref: dai-common.yaml#
···
     enum:
       - everest,es8311
       - everest,es8316
+      - everest,es8323
 
   reg:
     maxItems: 1

Documentation/devicetree/bindings/sound/loongson,ls2k1000-i2s.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/loongson,ls2k1000-i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson-2K1000 I2S controller
+
+maintainers:
+  - Binbin Zhou <[e-mail]>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: loongson,ls2k1000-i2s
+
+  reg:
+    items:
+      - description: Loongson I2S controller Registers.
+      - description: APB DMA config register for Loongson I2S controller.
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  '#sound-dai-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - dmas
+  - dma-names
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/loongson,ls2k-clk.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2s@1fe2d000 {
+        compatible = "loongson,ls2k1000-i2s";
+        reg = <0x1fe2d000 0x14>,
+              <0x1fe00438 0x8>;
+        interrupt-parent = <&liointc0>;
+        interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clk LOONGSON2_APB_CLK>;
+        dmas = <&apbdma2 0>, <&apbdma3 0>;
+        dma-names = "tx", "rx";
+        #sound-dai-cells = <0>;
+    };
+...

Documentation/devicetree/bindings/sound/nxp,uda1342.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nxp,uda1342.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP uda1342 audio CODECs
+
+maintainers:
+  - Binbin Zhou <[e-mail]>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: nxp,uda1342
+
+  reg:
+    maxItems: 1
+
+  '#sound-dai-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      codec@1a {
+        compatible = "nxp,uda1342";
+        reg = <0x1a>;
+        #sound-dai-cells = <0>;
+      };
+    };

sound/soc/codecs/Kconfig

···
 	imply SND_SOC_DA9055
 	imply SND_SOC_DMIC
 	imply SND_SOC_ES8316
+	imply SND_SOC_ES8323
 	imply SND_SOC_ES8326
 	imply SND_SOC_ES8328_SPI
 	imply SND_SOC_ES8328_I2C
···
 	imply SND_SOC_TWL4030
 	imply SND_SOC_TWL6040
 	imply SND_SOC_UDA1334
+	imply SND_SOC_UDA1342
 	imply SND_SOC_UDA1380
 	imply SND_SOC_WCD9335
 	imply SND_SOC_WCD934X
···
 
 config SND_SOC_ES8316
 	tristate "Everest Semi ES8316 CODEC"
+	depends on I2C
+
+config SND_SOC_ES8323
+	tristate "Everest Semi ES8323 CODEC"
 	depends on I2C
 
 config SND_SOC_ES8326
···
 	  The UDA1334 is an NXP audio codec, supports the I2S-bus data format
 	  and has basic features such as de-emphasis (at 44.1 kHz sampling
 	  rate) and mute.
+
+config SND_SOC_UDA1342
+	tristate "NXP UDA1342 CODEC"
+	depends on I2C
+	help
+	  The UDA1342 is an NXP audio codec, support 2x Stereo audio ADC (4x PGA
+	  mic inputs), stereo audio DAC, with basic audio processing.
 
 config SND_SOC_UDA1380
 	tristate

sound/soc/codecs/Makefile

···
 snd-soc-es83xx-dsm-common-y := es83xx-dsm-common.o
 snd-soc-es8311-y := es8311.o
 snd-soc-es8316-y := es8316.o
+snd-soc-es8323-y := es8323.o
 snd-soc-es8326-y := es8326.o
 snd-soc-es8328-y := es8328.o
 snd-soc-es8328-i2c-y := es8328-i2c.o
···
 snd-soc-twl4030-y := twl4030.o
 snd-soc-twl6040-y := twl6040.o
 snd-soc-uda1334-y := uda1334.o
+snd-soc-uda1342-y := uda1342.o
 snd-soc-uda1380-y := uda1380.o
 snd-soc-wcd-classh-y := wcd-clsh-v2.o
 snd-soc-wcd-mbhc-y := wcd-mbhc-v2.o
···
 obj-$(CONFIG_SND_SOC_ES83XX_DSM_COMMON)    += snd-soc-es83xx-dsm-common.o
 obj-$(CONFIG_SND_SOC_ES8311)    += snd-soc-es8311.o
 obj-$(CONFIG_SND_SOC_ES8316)    += snd-soc-es8316.o
+obj-$(CONFIG_SND_SOC_ES8323)	+= snd-soc-es8323.o
 obj-$(CONFIG_SND_SOC_ES8326)    += snd-soc-es8326.o
 obj-$(CONFIG_SND_SOC_ES8328)	+= snd-soc-es8328.o
 obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
···
 obj-$(CONFIG_SND_SOC_TWL4030)	+= snd-soc-twl4030.o
 obj-$(CONFIG_SND_SOC_TWL6040)	+= snd-soc-twl6040.o
 obj-$(CONFIG_SND_SOC_UDA1334)	+= snd-soc-uda1334.o
+obj-$(CONFIG_SND_SOC_UDA1342)	+= snd-soc-uda1342.o
 obj-$(CONFIG_SND_SOC_UDA1380)	+= snd-soc-uda1380.o
 obj-$(CONFIG_SND_SOC_WCD_CLASSH)	+= snd-soc-wcd-classh.o
 obj-$(CONFIG_SND_SOC_WCD_MBHC)	+= snd-soc-wcd-mbhc.o

sound/soc/codecs/es8323.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// es8323.c -- es8323 ALSA SoC audio driver
+//
+// Copyright 2024 Rockchip Electronics Co. Ltd.
+// Copyright 2024 Everest Semiconductor Co.,Ltd.
+// Copyright 2024 Loongson Technology Co.,Ltd.
+//
+// Author: Mark Brown <[e-mail]>
+//         Jianqun Xu <[e-mail]>
+//         Nickey Yang <[e-mail]>
+// Further cleanup and restructuring by:
+//         Binbin Zhou <[e-mail]>
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/regmap.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#include "es8323.h"
+
+struct es8323_priv {
+	unsigned int sysclk;
+	struct clk *mclk;
+	struct regmap *regmap;
+	struct snd_pcm_hw_constraint_list *sysclk_constraints;
+	struct snd_soc_component *component;
+};
+
+/* es8323 register cache */
+static const struct reg_default es8323_reg_defaults[] = {
+	{ ES8323_CONTROL1,     0x06 },
+	{ ES8323_CONTROL2,     0x1c },
+	{ ES8323_CHIPPOWER,    0xc3 },
+	{ ES8323_ADCPOWER,     0xfc },
+	{ ES8323_DACPOWER,     0xc0 },
+	{ ES8323_CHIPLOPOW1,   0x00 },
+	{ ES8323_CHIPLOPOW2,   0x00 },
+	{ ES8323_ANAVOLMANAG,  0x7c },
+	{ ES8323_MASTERMODE,   0x80 },
+	{ ES8323_ADCCONTROL1,  0x00 },
+	{ ES8323_ADCCONTROL2,  0x00 },
+	{ ES8323_ADCCONTROL3,  0x06 },
+	{ ES8323_ADCCONTROL4,  0x00 },
+	{ ES8323_ADCCONTROL5,  0x06 },
+	{ ES8323_ADCCONTROL6,  0x30 },
+	{ ES8323_ADC_MUTE,     0x30 },
+	{ ES8323_LADC_VOL,     0xc0 },
+	{ ES8323_RADC_VOL,     0xc0 },
+	{ ES8323_ADCCONTROL10, 0x38 },
+	{ ES8323_ADCCONTROL11, 0xb0 },
+	{ ES8323_ADCCONTROL12, 0x32 },
+	{ ES8323_ADCCONTROL13, 0x06 },
+	{ ES8323_ADCCONTROL14, 0x00 },
+	{ ES8323_DACCONTROL1,  0x00 },
+	{ ES8323_DACCONTROL2,  0x06 },
+	{ ES8323_DAC_MUTE,     0x30 },
+	{ ES8323_LDAC_VOL,     0xc0 },
+	{ ES8323_RDAC_VOL,     0xc0 },
+	{ ES8323_DACCONTROL6,  0x08 },
+	{ ES8323_DACCONTROL7,  0x06 },
+	{ ES8323_DACCONTROL8,  0x1f },
+	{ ES8323_DACCONTROL9,  0xf7 },
+	{ ES8323_DACCONTROL10, 0xfd },
+	{ ES8323_DACCONTROL11, 0xff },
+	{ ES8323_DACCONTROL12, 0x1f },
+	{ ES8323_DACCONTROL13, 0xf7 },
+	{ ES8323_DACCONTROL14, 0xfd },
+	{ ES8323_DACCONTROL15, 0xff },
+	{ ES8323_DACCONTROL16, 0x00 },
+	{ ES8323_DACCONTROL17, 0x38 },
+	{ ES8323_DACCONTROL18, 0x38 },
+	{ ES8323_DACCONTROL19, 0x38 },
+	{ ES8323_DACCONTROL20, 0x38 },
+	{ ES8323_DACCONTROL21, 0x38 },
+	{ ES8323_DACCONTROL22, 0x38 },
+	{ ES8323_DACCONTROL23, 0x00 },
+	{ ES8323_LOUT1_VOL,    0x00 },
+	{ ES8323_ROUT1_VOL,    0x00 },
+};
+
+static const char *const es8323_stereo_3d_texts[] = { "No 3D  ", "Level 1", "Level 2", "Level 3",
+						      "Level 4", "Level 5", "Level 6", "Level 7" };
+static SOC_ENUM_SINGLE_DECL(es8323_stereo_3d_enum, ES8323_DACCONTROL7, 2, es8323_stereo_3d_texts);
+
+static const char *const es8323_alc_func_texts[] = { "Off", "Right", "Left", "Stereo" };
+static SOC_ENUM_SINGLE_DECL(es8323_alc_function_enum,
+			    ES8323_ADCCONTROL10, 6, es8323_alc_func_texts);
+
+static const char *const es8323_ng_type_texts[] = { "Constant PGA Gain", "Mute ADC Output" };
+static SOC_ENUM_SINGLE_DECL(es8323_alc_ng_type_enum, ES8323_ADCCONTROL14, 1, es8323_ng_type_texts);
+
+static const char *const es8323_deemph_texts[] = { "None", "32Khz", "44.1Khz", "48Khz" };
+static SOC_ENUM_SINGLE_DECL(es8323_playback_deemphasis_enum,
+			    ES8323_DACCONTROL6, 6, es8323_deemph_texts);
+
+static const char *const es8323_adcpol_texts[] = { "Normal", "L Invert",
+						   "R Invert", "L + R Invert" };
+static SOC_ENUM_SINGLE_DECL(es8323_capture_polarity_enum,
+			    ES8323_ADCCONTROL6, 6, es8323_adcpol_texts);
+
+static const DECLARE_TLV_DB_SCALE(es8323_adc_tlv, -9600, 50, 1);
+static const DECLARE_TLV_DB_SCALE(es8323_dac_tlv, -9600, 50, 1);
+static const DECLARE_TLV_DB_SCALE(es8323_out_tlv, -4500, 150, 0);
+static const DECLARE_TLV_DB_SCALE(es8323_bypass_tlv, 0, 300, 0);
+static const DECLARE_TLV_DB_SCALE(es8323_bypass_tlv2, -15, 300, 0);
+
+static const struct snd_kcontrol_new es8323_snd_controls[] = {
+	SOC_ENUM("3D Mode", es8323_stereo_3d_enum),
+	SOC_ENUM("ALC Capture Function", es8323_alc_function_enum),
+	SOC_ENUM("ALC Capture NG Type", es8323_alc_ng_type_enum),
+	SOC_ENUM("Playback De-emphasis", es8323_playback_deemphasis_enum),
+	SOC_ENUM("Capture Polarity", es8323_capture_polarity_enum),
+	SOC_SINGLE("ALC Capture ZC Switch", ES8323_ADCCONTROL13, 6, 1, 0),
+	SOC_SINGLE("ALC Capture Decay Time", ES8323_ADCCONTROL12, 4, 15, 0),
+	SOC_SINGLE("ALC Capture Attack Time", ES8323_ADCCONTROL12, 0, 15, 0),
+	SOC_SINGLE("ALC Capture NG Threshold", ES8323_ADCCONTROL14, 3, 31, 0),
+	SOC_SINGLE("ALC Capture NG Switch", ES8323_ADCCONTROL14, 0, 1, 0),
+	SOC_SINGLE("ZC Timeout Switch", ES8323_ADCCONTROL13, 6, 1, 0),
+	SOC_SINGLE("Capture Mute Switch", ES8323_ADC_MUTE, 2, 1, 0),
+	SOC_SINGLE_TLV("Left Channel Capture Volume", ES8323_ADCCONTROL1, 4, 8,
+		       0, es8323_bypass_tlv),
+	SOC_SINGLE_TLV("Right Channel Capture Volume", ES8323_ADCCONTROL1, 0,
+		       8, 0, es8323_bypass_tlv),
+	SOC_SINGLE_TLV("Left Mixer Left Bypass Volume", ES8323_DACCONTROL17, 3,
+		       7, 1, es8323_bypass_tlv2),
+	SOC_SINGLE_TLV("Right Mixer Right Bypass Volume", ES8323_DACCONTROL20,
+		       3, 7, 1, es8323_bypass_tlv2),
+	SOC_DOUBLE_R_TLV("PCM Volume", ES8323_LDAC_VOL, ES8323_RDAC_VOL,
+			 0, 192, 1, es8323_dac_tlv),
+	SOC_DOUBLE_R_TLV("Capture Digital Volume", ES8323_LADC_VOL,
+			 ES8323_RADC_VOL, 0, 192, 1, es8323_adc_tlv),
+	SOC_DOUBLE_R_TLV("Output 1 Playback Volume", ES8323_LOUT1_VOL,
+			 ES8323_ROUT1_VOL, 0, 33, 0, es8323_out_tlv),
+	SOC_DOUBLE_R_TLV("Output 2 Playback Volume", ES8323_LOUT2_VOL,
+			 ES8323_ROUT2_VOL, 0, 33, 0, es8323_out_tlv),
+};
+
+/* Left DAC Route */
+static const char *const es8323_pga_sell[] = { "Line 1L", "Line 2L", "NC", "DifferentialL" };
+static SOC_ENUM_SINGLE_DECL(es8323_left_dac_enum, ES8323_ADCCONTROL2, 6, es8323_pga_sell);
+static const struct snd_kcontrol_new es8323_left_dac_mux_controls =
+	SOC_DAPM_ENUM("Left DAC Route", es8323_left_dac_enum);
+
+/* Right DAC Route */
+static const char *const es8323_pga_selr[] = { "Line 1R", "Line 2R", "NC", "DifferentialR" };
+static SOC_ENUM_SINGLE_DECL(es8323_right_dac_enum, ES8323_ADCCONTROL2, 4, es8323_pga_selr);
+static const struct snd_kcontrol_new es8323_right_dac_mux_controls =
+	SOC_DAPM_ENUM("Right DAC Route", es8323_right_dac_enum);
+
+/* Left Line Mux */
+static const char *const es8323_lin_sell[] = { "Line 1L", "Line 2L", "NC", "MicL" };
+static SOC_ENUM_SINGLE_DECL(es8323_llin_enum, ES8323_DACCONTROL16, 3, es8323_lin_sell);
+static const struct snd_kcontrol_new es8323_left_line_controls =
+	SOC_DAPM_ENUM("LLIN Mux", es8323_llin_enum);
+
+/* Right Line Mux */
+static const char *const es8323_lin_selr[] = { "Line 1R", "Line 2R", "NC", "MicR" };
+static SOC_ENUM_SINGLE_DECL(es8323_rlin_enum, ES8323_DACCONTROL16, 0, es8323_lin_selr);
+static const struct snd_kcontrol_new es8323_right_line_controls =
+	SOC_DAPM_ENUM("RLIN Mux", es8323_rlin_enum);
+
+/* Differential Mux */
+static const char *const es8323_diffmux_sel[] = { "Line 1", "Line 2" };
+static SOC_ENUM_SINGLE_DECL(es8323_diffmux_enum, ES8323_ADCCONTROL3, 7, es8323_diffmux_sel);
+static const struct snd_kcontrol_new es8323_diffmux_controls =
+	SOC_DAPM_ENUM("Route2", es8323_diffmux_enum);
+
+/* Mono ADC Mux */
+static const char *const es8323_mono_adc_mux[] = { "Stereo", "Mono (Left)", "Mono (Right)" };
+static SOC_ENUM_SINGLE_DECL(es8323_mono_adc_mux_enum, ES8323_ADCCONTROL3, 3, es8323_mono_adc_mux);
+static const struct snd_kcontrol_new es8323_mono_adc_mux_controls =
+	SOC_DAPM_ENUM("Mono Mux", es8323_mono_adc_mux_enum);
+
+/* Left Mixer */
+static const struct snd_kcontrol_new es8323_left_mixer_controls[] = {
+	SOC_DAPM_SINGLE("Left Playback Switch", SND_SOC_NOPM, 7, 1, 1),
+	SOC_DAPM_SINGLE("Left Bypass Switch", ES8323_DACCONTROL17, 6, 1, 0),
+};
+
+/* Right Mixer */
+static const struct snd_kcontrol_new es8323_right_mixer_controls[] = {
+	SOC_DAPM_SINGLE("Right Playback Switch", SND_SOC_NOPM, 6, 1, 1),
+	SOC_DAPM_SINGLE("Right Bypass Switch", ES8323_DACCONTROL20, 6, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget es8323_dapm_widgets[] = {
+	SND_SOC_DAPM_INPUT("LINPUT1"),
+	SND_SOC_DAPM_INPUT("LINPUT2"),
+	SND_SOC_DAPM_INPUT("RINPUT1"),
+	SND_SOC_DAPM_INPUT("RINPUT2"),
+
+	SND_SOC_DAPM_MICBIAS("Mic Bias", SND_SOC_NOPM, 3, 1),
+
+	/* Muxes */
+	SND_SOC_DAPM_MUX("Left PGA Mux", SND_SOC_NOPM, 0, 0, &es8323_left_dac_mux_controls),
+	SND_SOC_DAPM_MUX("Right PGA Mux", SND_SOC_NOPM, 0, 0, &es8323_right_dac_mux_controls),
+	SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0, &es8323_diffmux_controls),
+	SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0, &es8323_mono_adc_mux_controls),
+	SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0, &es8323_mono_adc_mux_controls),
+	SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0, &es8323_left_line_controls),
+	SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0, &es8323_right_line_controls),
+
+	SND_SOC_DAPM_ADC("Right ADC", "Right Capture", SND_SOC_NOPM, 4, 1),
+	SND_SOC_DAPM_ADC("Left ADC", "Left Capture", SND_SOC_NOPM, 5, 1),
+	SND_SOC_DAPM_DAC("Right DAC", "Right Playback", SND_SOC_NOPM, 6, 1),
+	SND_SOC_DAPM_DAC("Left DAC", "Left Playback", SND_SOC_NOPM, 7, 1),
+
+	SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
+			   &es8323_left_mixer_controls[0],
+			   ARRAY_SIZE(es8323_left_mixer_controls)),
+	SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
+			   &es8323_right_mixer_controls[0],
+			   ARRAY_SIZE(es8323_right_mixer_controls)),
+
+	SND_SOC_DAPM_PGA("Right ADC Power", SND_SOC_NOPM, 6, 1, NULL, 0),
+	SND_SOC_DAPM_PGA("Left ADC Power", SND_SOC_NOPM, 7, 1, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Out 2", SND_SOC_NOPM, 2, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Left Out 2", SND_SOC_NOPM, 3, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Out 1", SND_SOC_NOPM, 4, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Left Out 1", SND_SOC_NOPM, 5, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("LAMP", ES8323_ADCCONTROL1, 4, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("RAMP", ES8323_ADCCONTROL1, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_OUTPUT("LOUT1"),
+	SND_SOC_DAPM_OUTPUT("ROUT1"),
+	SND_SOC_DAPM_OUTPUT("LOUT2"),
+	SND_SOC_DAPM_OUTPUT("ROUT2"),
+	SND_SOC_DAPM_OUTPUT("VREF"),
+};
+
+static const struct snd_soc_dapm_route es8323_dapm_routes[] = {
+	/*12.22*/
+	{"Left PGA Mux", "Line 1L", "LINPUT1"},
+	{"Left PGA Mux", "Line 2L", "LINPUT2"},
+	{"Left PGA Mux", "DifferentialL", "Differential Mux"},
+
+	{"Right PGA Mux", "Line 1R", "RINPUT1"},
+	{"Right PGA Mux", "Line 2R", "RINPUT2"},
+	{"Right PGA Mux", "DifferentialR", "Differential Mux"},
+
+	{"Differential Mux", "Line 1", "LINPUT1"},
+	{"Differential Mux", "Line 1", "RINPUT1"},
+	{"Differential Mux", "Line 2", "LINPUT2"},
+	{"Differential Mux", "Line 2", "RINPUT2"},
+
+	{"Left ADC Mux", "Stereo", "Right PGA Mux"},
+	{"Left ADC Mux", "Stereo", "Left PGA Mux"},
+	{"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
+
+	{"Right ADC Mux", "Stereo", "Left PGA Mux"},
+	{"Right ADC Mux", "Stereo", "Right PGA Mux"},
+	{"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
+
+	{"Left ADC Power", NULL, "Left ADC Mux"},
+	{"Right ADC Power", NULL, "Right ADC Mux"},
+	{"Left ADC", NULL, "Left ADC Power"},
+	{"Right ADC", NULL, "Right ADC Power"},
+
+	{"Left Line Mux", "Line 1L", "LINPUT1"},
+	{"Left Line Mux", "Line 2L", "LINPUT2"},
+	{"Left Line Mux", "MicL", "Left PGA Mux"},
+
+	{"Right Line Mux", "Line 1R", "RINPUT1"},
+	{"Right Line Mux", "Line 2R", "RINPUT2"},
+	{"Right Line Mux", "MicR", "Right PGA Mux"},
+
+	{"Left Mixer", "Left Playback Switch", "Left DAC"},
+	{"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
+
+	{"Right Mixer", "Right Playback Switch", "Right DAC"},
+	{"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
+
+	{"Left Out 1", NULL, "Left Mixer"},
+	{"LOUT1", NULL, "Left Out 1"},
+	{"Right Out 1", NULL, "Right Mixer"},
+	{"ROUT1", NULL, "Right Out 1"},
+
+	{"Left Out 2", NULL, "Left Mixer"},
+	{"LOUT2", NULL, "Left Out 2"},
+	{"Right Out 2", NULL, "Right Mixer"},
+	{"ROUT2", NULL, "Right Out 2"},
+};
+
+struct coeff_div {
+	u32 mclk;
+	u32 rate;
+	u16 fs;
+	u8 sr:4;
+	u8 usb:1;
+};
+
+/* codec hifi mclk clock divider coefficients */
+static const struct coeff_div es8323_coeff_div[] = {
+	/* 8k */
+	{12288000, 8000, 1536, 0xa, 0x0},
+	{11289600, 8000, 1408, 0x9, 0x0},
+	{18432000, 8000, 2304, 0xc, 0x0},
+	{16934400, 8000, 2112, 0xb, 0x0},
+	{12000000, 8000, 1500, 0xb, 0x1},
+
+	/* 11.025k */
+	{11289600, 11025, 1024, 0x7, 0x0},
+	{16934400, 11025, 1536, 0xa, 0x0},
+	{12000000, 11025, 1088, 0x9, 0x1},
+
+	/* 16k */
+	{12288000, 16000, 768, 0x6, 0x0},
+	{18432000, 16000, 1152, 0x8, 0x0},
+	{12000000, 16000, 750, 0x7, 0x1},
+
+	/* 22.05k */
+	{11289600, 22050, 512, 0x4, 0x0},
+	{16934400, 22050, 768, 0x6, 0x0},
+	{12000000, 22050, 544, 0x6, 0x1},
+
+	/* 32k */
+	{12288000, 32000, 384, 0x3, 0x0},
+	{18432000, 32000, 576, 0x5, 0x0},
+	{12000000, 32000, 375, 0x4, 0x1},
+
+	/* 44.1k */
+	{11289600, 44100, 256, 0x2, 0x0},
+	{16934400, 44100, 384, 0x3, 0x0},
+	{12000000, 44100, 272, 0x3, 0x1},
+
+	/* 48k */
+	{12288000, 48000, 256, 0x2, 0x0},
+	{18432000, 48000, 384, 0x3, 0x0},
+	{12000000, 48000, 250, 0x2, 0x1},
+
+	/* 88.2k */
+	{11289600, 88200, 128, 0x0, 0x0},
+	{16934400, 88200, 192, 0x1, 0x0},
+	{12000000, 88200, 136, 0x1, 0x1},
+
+	/* 96k */
+	{12288000, 96000, 128, 0x0, 0x0},
+	{18432000, 96000, 192, 0x1, 0x0},
+	{12000000, 96000, 125, 0x0, 0x1},
+};
+
+static unsigned int rates_12288[] = {
+	8000, 12000, 16000, 24000, 24000, 32000, 48000, 96000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_12288 = {
+	.count = ARRAY_SIZE(rates_12288),
+	.list = rates_12288,
+};
+
+static unsigned int rates_112896[] = {
+	8000, 11025, 22050, 44100,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_112896 = {
+	.count = ARRAY_SIZE(rates_112896),
+	.list = rates_112896,
+};
+
+static unsigned int rates_12[] = {
+	8000, 11025, 12000, 16000, 22050, 24000,
+	32000, 44100, 48000, 48000, 88235, 96000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_12 = {
+	.count = ARRAY_SIZE(rates_12),
+	.list = rates_12,
+};
+
+static inline int get_coeff(int mclk, int rate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(es8323_coeff_div); i++) {
+		if (es8323_coeff_div[i].rate == rate &&
+		    es8323_coeff_div[i].mclk == mclk)
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int es8323_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+				 int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+
+	switch (freq) {
+	case 11289600:
+	case 18432000:
+	case 22579200:
+	case 36864000:
+		es8323->sysclk_constraints = &constraints_112896;
+		break;
+	case 12288000:
+	case 16934400:
+	case 24576000:
+	case 33868800:
+		es8323->sysclk_constraints = &constraints_12288;
+		break;
+	case 12000000:
+	case 24000000:
+		es8323->sysclk_constraints = &constraints_12;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	es8323->sysclk = freq;
+	return 0;
+}
+
+static int es8323_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	u8 iface = snd_soc_component_read(component, ES8323_MASTERMODE);
+	u8 adciface = snd_soc_component_read(component, ES8323_ADC_IFACE);
+	u8 daciface = snd_soc_component_read(component, ES8323_DAC_IFACE);
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_BC_FP:
+		iface |= 0x80;
+		break;
+	case SND_SOC_DAIFMT_BC_FC:
+		iface &= 0x7f;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* interface format */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		adciface &= 0xfc;
+		daciface &= 0xf8;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		adciface &= 0xfd;
+		daciface &= 0xf9;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		adciface &= 0xfe;
+		daciface &= 0xfa;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+	case SND_SOC_DAIFMT_DSP_B:
+		adciface &= 0xff;
+		daciface &= 0xfb;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		iface &= 0xdf;
+		adciface &= 0xdf;
+		daciface &= 0xbf;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		iface |= 0x20;
+		adciface |= 0x20;
+		daciface |= 0x40;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		iface |= 0x20;
+		adciface &= 0xdf;
+		daciface &= 0xbf;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		iface &= 0xdf;
+		adciface |= 0x20;
+		daciface |= 0x40;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_component_write(component, ES8323_MASTERMODE, iface);
+	snd_soc_component_write(component, ES8323_ADC_IFACE, adciface);
+	snd_soc_component_write(component, ES8323_DAC_IFACE, daciface);
+
+	return 0;
+}
+
+static int es8323_pcm_startup(struct snd_pcm_substream *substream,
+			      struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+
+	if (es8323->sysclk) {
+		snd_pcm_hw_constraint_list(substream->runtime, 0,
+					   SNDRV_PCM_HW_PARAM_RATE,
+					   es8323->sysclk_constraints);
+	}
+
+	return 0;
+}
+
+static int es8323_pcm_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+	u16 srate = snd_soc_component_read(component, ES8323_MASTERMODE) & 0x80;
+	u16 adciface = snd_soc_component_read(component, ES8323_ADC_IFACE) & 0xe3;
+	u16 daciface = snd_soc_component_read(component, ES8323_DAC_IFACE) & 0xc7;
+	int coeff;
+
+	coeff = get_coeff(es8323->sysclk, params_rate(params));
+	if (coeff < 0) {
+		coeff = get_coeff(es8323->sysclk / 2, params_rate(params));
+		srate |= 0x40;
+	}
+
+	if (coeff < 0) {
+		dev_err(component->dev,
+			"Unable to configure sample rate %dHz with %dHz MCLK\n",
+			params_rate(params), es8323->sysclk);
+		return coeff;
+	}
+
+	/* bit size */
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		adciface |= 0xc;
+		daciface |= 0x18;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		adciface |= 0x4;
+		daciface |= 0x8;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		adciface |= 0x10;
+		daciface |= 0x20;
+		break;
+	}
+
+	snd_soc_component_write(component, ES8323_DAC_IFACE, daciface);
+	snd_soc_component_write(component, ES8323_ADC_IFACE, adciface);
+
+	snd_soc_component_write(component, ES8323_MASTERMODE, srate);
+	snd_soc_component_write(component, ES8323_ADCCONTROL5,
+				es8323_coeff_div[coeff].sr |
+				(es8323_coeff_div[coeff].usb) << 4);
+	snd_soc_component_write(component, ES8323_DACCONTROL2,
+				es8323_coeff_div[coeff].sr |
+				(es8323_coeff_div[coeff].usb) << 4);
+
+	snd_soc_component_write(component, ES8323_DACPOWER, 0x3c);
+
+	return 0;
+}
+
+static int es8323_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+	struct snd_soc_component *component = dai->component;
+	u32 val = mute ? 0x6 : 0x2;
+
+	snd_soc_component_write(component, ES8323_DAC_MUTE, val);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops es8323_ops = {
+	.startup	= es8323_pcm_startup,
+	.hw_params	= es8323_pcm_hw_params,
+	.set_fmt	= es8323_set_dai_fmt,
+	.set_sysclk	= es8323_set_dai_sysclk,
+	.mute_stream	= es8323_mute_stream,
+};
+
+#define ES8323_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+			SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_driver es8323_dai = {
+	.name = "ES8323 HiFi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = ES8323_FORMATS,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = ES8323_FORMATS,
+	},
+	.ops = &es8323_ops,
+	.symmetric_rate = 1,
+};
+
+static int es8323_probe(struct snd_soc_component *component)
+{
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	es8323->component = component;
+
+	es8323->mclk = devm_clk_get_optional(component->dev, "mclk");
+	if (IS_ERR(es8323->mclk)) {
+		dev_err(component->dev, "unable to get mclk\n");
+		return PTR_ERR(es8323->mclk);
+	}
+
+	if (!es8323->mclk)
+		dev_warn(component->dev, "assuming static mclk\n");
+
+	ret = clk_prepare_enable(es8323->mclk);
+	if (ret) {
+		dev_err(component->dev, "unable to enable mclk\n");
+		return ret;
+	}
+
+	snd_soc_component_write(component, ES8323_CONTROL2, 0x60);
+	snd_soc_component_write(component, ES8323_CHIPPOWER, 0x00);
+	snd_soc_component_write(component, ES8323_DACCONTROL17, 0xB8);
+
+	return 0;
+}
+
+static int es8323_set_bias_level(struct snd_soc_component *component,
+				 enum snd_soc_bias_level level)
+{
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		ret = clk_prepare_enable(es8323->mclk);
+		if (ret)
+			return ret;
+
+		snd_soc_component_write(component, ES8323_CHIPPOWER, 0xf0);
+		usleep_range(18000, 20000);
+		snd_soc_component_write(component, ES8323_DACPOWER, 0x3c);
+		snd_soc_component_write(component, ES8323_ANAVOLMANAG, 0x7c);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW1, 0x00);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW2, 0x00);
+		snd_soc_component_write(component, ES8323_CHIPPOWER, 0x00);
+		snd_soc_component_write(component, ES8323_ADCPOWER, 0x09);
+		snd_soc_component_write(component, ES8323_ADCCONTROL14, 0x00);
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		snd_soc_component_write(component, ES8323_ANAVOLMANAG, 0x7c);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW1, 0x00);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW2, 0x00);
+		snd_soc_component_write(component, ES8323_CHIPPOWER, 0x00);
+		snd_soc_component_write(component, ES8323_ADCPOWER, 0x59);
+		break;
+	case SND_SOC_BIAS_OFF:
+		clk_disable_unprepare(es8323->mclk);
+		snd_soc_component_write(component, ES8323_ADCPOWER, 0xff);
+		snd_soc_component_write(component, ES8323_DACPOWER, 0xC0);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW1, 0xff);
+		snd_soc_component_write(component, ES8323_CHIPLOPOW2, 0xff);
+		snd_soc_component_write(component, ES8323_CHIPPOWER, 0xff);
+		snd_soc_component_write(component, ES8323_ANAVOLMANAG, 0x7b);
+		break;
+	}
+
+	return 0;
+}
+
+static void es8323_remove(struct snd_soc_component *component)
+{
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+
+	clk_disable_unprepare(es8323->mclk);
+	es8323_set_bias_level(component, SND_SOC_BIAS_OFF);
+}
+
+static int es8323_suspend(struct snd_soc_component *component)
+{
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+
+	regcache_cache_only(es8323->regmap, true);
+	regcache_mark_dirty(es8323->regmap);
+
+	return 0;
+}
+
+static int es8323_resume(struct snd_soc_component *component)
+{
+	struct es8323_priv *es8323 = snd_soc_component_get_drvdata(component);
+
+	regcache_cache_only(es8323->regmap, false);
+	regcache_sync(es8323->regmap);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_dev_es8323 = {
+	.probe			= es8323_probe,
+	.remove			= es8323_remove,
+	.suspend		= es8323_suspend,
+	.resume			= es8323_resume,
+	.set_bias_level		= es8323_set_bias_level,
+	.controls		= es8323_snd_controls,
+	.num_controls		= ARRAY_SIZE(es8323_snd_controls),
+	.dapm_widgets		= es8323_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(es8323_dapm_widgets),
+	.dapm_routes		= es8323_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(es8323_dapm_routes),
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static const struct regmap_config es8323_regmap = {
+	.reg_bits		= 8,
+	.val_bits		= 8,
+	.use_single_read	= true,
+	.use_single_write	= true,
+	.max_register		= 0x53,
+	.reg_defaults		= es8323_reg_defaults,
+	.num_reg_defaults	= ARRAY_SIZE(es8323_reg_defaults),
+	.cache_type		= REGCACHE_MAPLE,
+};
+
+static int es8323_i2c_probe(struct i2c_client *i2c_client)
+{
+	struct es8323_priv *es8323;
+	struct device *dev = &i2c_client->dev;
+
+	es8323 = devm_kzalloc(dev, sizeof(*es8323), GFP_KERNEL);
+	if (IS_ERR(es8323))
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c_client, es8323);
+
+	es8323->regmap = devm_regmap_init_i2c(i2c_client, &es8323_regmap);
+	if (IS_ERR(es8323->regmap))
+		return PTR_ERR(es8323->regmap);
+
+	return devm_snd_soc_register_component(dev,
+					       &soc_component_dev_es8323,
+					       &es8323_dai, 1);
+}
+
+static const struct i2c_device_id es8323_i2c_id[] = {
+	{ "es8323", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, es8323_i2c_id);
+
+static const struct acpi_device_id es8323_acpi_match[] = {
+	{ "ESSX8323", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, es8323_acpi_match);
+
+static const struct of_device_id es8323_of_match[] = {
+	{ .compatible = "everest,es8323" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, es8323_of_match);
+
+static struct i2c_driver es8323_i2c_driver = {
+	.driver = {
+		.name = "ES8323",
+		.acpi_match_table = es8323_acpi_match,
+		.of_match_table = es8323_of_match,
+	},
+	.probe = es8323_i2c_probe,
+	.id_table = es8323_i2c_id,
+};
+module_i2c_driver(es8323_i2c_driver);
+
+MODULE_DESCRIPTION("Everest Semi ES8323 ALSA SoC Codec Driver");
+MODULE_AUTHOR("Mark Brown <[e-mail]>");
+MODULE_AUTHOR("Binbin Zhou <[e-mail]>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/es8323.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright Openedhand Ltd.
+ *
+ * Author: Richard Purdie <[e-mail]>
+ *         Binbin Zhou <[e-mail]>
+ *
+ */
+
+#ifndef _ES8323_H
+#define _ES8323_H
+
+/* ES8323 register space */
+
+/* Chip Control and Power Management */
+#define ES8323_CONTROL1		0x00
+#define ES8323_CONTROL2		0x01
+#define ES8323_CHIPPOWER	0x02
+#define ES8323_ADCPOWER		0x03
+#define ES8323_DACPOWER		0x04
+#define ES8323_CHIPLOPOW1	0x05
+#define ES8323_CHIPLOPOW2	0x06
+#define ES8323_ANAVOLMANAG	0x07
+#define ES8323_MASTERMODE	0x08
+
+/* ADC Control */
+#define ES8323_ADCCONTROL1	0x09
+#define ES8323_ADCCONTROL2	0x0a
+#define ES8323_ADCCONTROL3	0x0b
+#define ES8323_ADCCONTROL4	0x0c
+#define ES8323_ADCCONTROL5	0x0d
+#define ES8323_ADCCONTROL6	0x0e
+#define ES8323_ADC_MUTE		0x0f
+#define ES8323_LADC_VOL		0x10
+#define ES8323_RADC_VOL		0x11
+#define ES8323_ADCCONTROL10	0x12
+#define ES8323_ADCCONTROL11	0x13
+#define ES8323_ADCCONTROL12	0x14
+#define ES8323_ADCCONTROL13	0x15
+#define ES8323_ADCCONTROL14	0x16
+
+/* DAC Control */
+#define ES8323_DACCONTROL1	0x17
+#define ES8323_DACCONTROL2	0x18
+#define ES8323_DAC_MUTE		0x19
+#define ES8323_LDAC_VOL		0x1a
+#define ES8323_RDAC_VOL		0x1b
+#define ES8323_DACCONTROL6	0x1c
+#define ES8323_DACCONTROL7	0x1d
+#define ES8323_DACCONTROL8	0x1e
+#define ES8323_DACCONTROL9	0x1f
+#define ES8323_DACCONTROL10	0x20
+#define ES8323_DACCONTROL11	0x21
+#define ES8323_DACCONTROL12	0x22
+#define ES8323_DACCONTROL13	0x23
+#define ES8323_DACCONTROL14	0x24
+#define ES8323_DACCONTROL15	0x25
+#define ES8323_DACCONTROL16	0x26
+#define ES8323_DACCONTROL17	0x27
+#define ES8323_DACCONTROL18	0x28
+#define ES8323_DACCONTROL19	0x29
+#define ES8323_DACCONTROL20	0x2a
+#define ES8323_DACCONTROL21	0x2b
+#define ES8323_DACCONTROL22	0x2c
+#define ES8323_DACCONTROL23	0x2d
+#define ES8323_LOUT1_VOL	0x2e
+#define ES8323_ROUT1_VOL	0x2f
+#define ES8323_LOUT2_VOL	0x30
+#define ES8323_ROUT2_VOL	0x31
+#define ES8323_DACCONTROL28	0x32
+#define ES8323_DACCONTROL29	0x33
+#define ES8323_DACCONTROL30	0x34
+
+#define ES8323_ADC_IFACE	ES8323_ADCCONTROL4
+#define ES8323_ADC_SRATE	ES8323_ADCCONTROL5
+#define ES8323_DAC_IFACE	ES8323_DACCONTROL1
+#define ES8323_DAC_SRATE	ES8323_DACCONTROL2
+#endif

sound/soc/codecs/uda1342.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// uda1342.c  --  UDA1342 ALSA SoC Codec driver
+// Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
+//
+// Copyright 2007 Dension Audio Systems Ltd.
+// Copyright 2024 Loongson Technology Co.,Ltd.
+//
+// Modifications by Christian Pellegrin <[e-mail]>
+// Further cleanup and restructuring by:
+//         Binbin Zhou <[e-mail]>
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#include "uda1342.h"
+
+#define UDA134X_FORMATS	(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
+			 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
+
+struct uda1342_priv {
+	int sysclk;
+	int dai_fmt;
+
+	struct snd_pcm_substream *provider_substream;
+	struct snd_pcm_substream *consumer_substream;
+
+	struct regmap *regmap;
+	struct i2c_client *i2c;
+};
+
+static const struct reg_default uda1342_reg_defaults[] = {
+	{ 0x00, 0x1042 },
+	{ 0x01, 0x0000 },
+	{ 0x10, 0x0088 },
+	{ 0x11, 0x0000 },
+	{ 0x12, 0x0000 },
+	{ 0x20, 0x0080 },
+	{ 0x21, 0x0080 },
+};
+
+static int uda1342_mute(struct snd_soc_dai *dai, int mute, int direction)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+	unsigned int mask;
+	unsigned int val = 0;
+
+	/* Master mute */
+	mask = BIT(5);
+	if (mute)
+		val = mask;
+
+	return regmap_update_bits(uda1342->regmap, 0x10, mask, val);
+}
+
+static int uda1342_startup(struct snd_pcm_substream *substream,
+			   struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *provider_runtime;
+
+	if (uda1342->provider_substream) {
+		provider_runtime = uda1342->provider_substream->runtime;
+
+		snd_pcm_hw_constraint_single(substream->runtime,
+					     SNDRV_PCM_HW_PARAM_RATE, provider_runtime->rate);
+		snd_pcm_hw_constraint_single(substream->runtime,
+					     SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+					     provider_runtime->sample_bits);
+
+		uda1342->consumer_substream = substream;
+	} else {
+		uda1342->provider_substream = substream;
+	}
+
+	return 0;
+}
+
+static void uda1342_shutdown(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+
+	if (uda1342->provider_substream == substream)
+		uda1342->provider_substream = uda1342->consumer_substream;
+
+	uda1342->consumer_substream = NULL;
+}
+
+static int uda1342_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+	struct device *dev = &uda1342->i2c->dev;
+	unsigned int hw_params = 0;
+
+	if (substream == uda1342->consumer_substream)
+		return 0;
+
+	/* set SYSCLK / fs ratio */
+	switch (uda1342->sysclk / params_rate(params)) {
+	case 512:
+		break;
+	case 384:
+		hw_params |= BIT(4);
+		break;
+	case 256:
+		hw_params |= BIT(5);
+		break;
+	default:
+		dev_err(dev, "unsupported frequency\n");
+		return -EINVAL;
+	}
+
+	/* set DAI format and word length */
+	switch (uda1342->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		switch (params_width(params)) {
+		case 16:
+			hw_params |= BIT(1);
+			break;
+		case 18:
+			hw_params |= BIT(2);
+			break;
+		case 20:
+			hw_params |= BIT(2) | BIT(1);
+			break;
+		default:
+			dev_err(dev, "unsupported format (right)\n");
+			return -EINVAL;
+		}
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		hw_params |= BIT(3);
+		break;
+	default:
+		dev_err(dev, "unsupported format\n");
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(uda1342->regmap, 0x0,
+				  STATUS0_DAIFMT_MASK | STATUS0_SYSCLK_MASK, hw_params);
+}
+
+static int uda1342_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+				  int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+	struct device *dev = &uda1342->i2c->dev;
+
+	/*
+	 * Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
+	 * because the codec is slave. Of course limitations of the clock
+	 * master (the IIS controller) apply.
+	 * We'll error out on set_hw_params if it's not OK
+	 */
+	if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
+		uda1342->sysclk = freq;
+		return 0;
+	}
+
+	dev_err(dev, "unsupported sysclk\n");
+
+	return -EINVAL;
+}
+
+static int uda1342_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct uda1342_priv *uda1342 = snd_soc_component_get_drvdata(component);
+
+	/* codec supports only full consumer mode */
+	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_BC_FC) {
+		dev_err(&uda1342->i2c->dev, "unsupported consumer mode.\n");
+		return -EINVAL;
+	}
+
+	/* We can't setup DAI format here as it depends on the word bit num */
+	/* so let's just store the value for later */
+	uda1342->dai_fmt = fmt;
+
+	return 0;
+}
+
+static const struct snd_kcontrol_new uda1342_snd_controls[] = {
+	SOC_SINGLE("Master Playback Volume", 0x11, 0, 0x3F, 1),
+	SOC_SINGLE("Analog1 Volume", 0x12, 0, 0x1F, 1),
+};
+
+/* Common DAPM widgets */
+static const struct snd_soc_dapm_widget uda1342_dapm_widgets[] = {
+	SND_SOC_DAPM_INPUT("VINL1"),
+	SND_SOC_DAPM_INPUT("VINR1"),
+	SND_SOC_DAPM_INPUT("VINL2"),
+	SND_SOC_DAPM_INPUT("VINR2"),
+
+	SND_SOC_DAPM_DAC("DAC", "Playback", 0, 1, 0),
+	SND_SOC_DAPM_ADC("ADC", "Capture", 0, 9, 0),
+
+	SND_SOC_DAPM_OUTPUT("VOUTL"),
+	SND_SOC_DAPM_OUTPUT("VOUTR"),
+};
+
+static const struct snd_soc_dapm_route uda1342_dapm_routes[] = {
+	{ "ADC", NULL, "VINL1" },
+	{ "ADC", NULL, "VINR1" },
+	{ "ADC", NULL, "VINL2" },
+	{ "ADC", NULL, "VINR2" },
+	{ "VOUTL", NULL, "DAC" },
+	{ "VOUTR", NULL, "DAC" },
+};
+
+static const struct snd_soc_dai_ops uda1342_dai_ops = {
+	.startup	= uda1342_startup,
+	.shutdown	= uda1342_shutdown,
+	.hw_params	= uda1342_hw_params,
+	.mute_stream	= uda1342_mute,
+	.set_sysclk	= uda1342_set_dai_sysclk,
+	.set_fmt	= uda1342_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver uda1342_dai = {
+	.name = "uda1342-hifi",
+	/* playback capabilities */
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = UDA134X_FORMATS,
+	},
+	/* capture capabilities */
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = UDA134X_FORMATS,
+	},
+	/* pcm operations */
+	.ops = &uda1342_dai_ops,
+};
+
+static const struct snd_soc_component_driver soc_component_dev_uda1342 = {
+	.controls		= uda1342_snd_controls,
+	.num_controls		= ARRAY_SIZE(uda1342_snd_controls),
+	.dapm_widgets		= uda1342_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(uda1342_dapm_widgets),
+	.dapm_routes		= uda1342_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(uda1342_dapm_routes),
+	.suspend_bias_off	= 1,
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static const struct regmap_config uda1342_regmap = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.max_register = 0x21,
+	.reg_defaults = uda1342_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(uda1342_reg_defaults),
+	.cache_type = REGCACHE_MAPLE,
+};
+
+static int uda1342_i2c_probe(struct i2c_client *i2c)
+{
+	struct uda1342_priv *uda1342;
+
+	uda1342 = devm_kzalloc(&i2c->dev, sizeof(*uda1342), GFP_KERNEL);
+	if (!uda1342)
+		return -ENOMEM;
+
+	uda1342->regmap = devm_regmap_init_i2c(i2c, &uda1342_regmap);
+	if (IS_ERR(uda1342->regmap))
+		return PTR_ERR(uda1342->regmap);
+
+	i2c_set_clientdata(i2c, uda1342);
+	uda1342->i2c = i2c;
+
+	return devm_snd_soc_register_component(&i2c->dev,
+					       &soc_component_dev_uda1342,
+					       &uda1342_dai, 1);
+}
+
+static int uda1342_suspend(struct device *dev)
+{
+	struct uda1342_priv *uda1342 = dev_get_drvdata(dev);
+
+	regcache_cache_only(uda1342->regmap, true);
+
+	return 0;
+}
+
+static int uda1342_resume(struct device *dev)
+{
+	struct uda1342_priv *uda1342 = dev_get_drvdata(dev);
+
+	regcache_mark_dirty(uda1342->regmap);
+	regcache_sync(uda1342->regmap);
+
+	return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(uda1342_pm_ops,
+				 uda1342_suspend, uda1342_resume, NULL);
+
+static const struct i2c_device_id uda1342_i2c_id[] = {
+	 { "uda1342", 0 },
+	 { }
+};
+MODULE_DEVICE_TABLE(i2c, uda1342_i2c_id);
+
+static const struct of_device_id uda1342_of_match[] = {
+	 { .compatible = "nxp,uda1342" },
+	 { }
+};
+MODULE_DEVICE_TABLE(of, uda1342_of_match);
+
+static struct i2c_driver uda1342_i2c_driver = {
+	.driver = {
+		.name =  "uda1342",
+		.of_match_table = uda1342_of_match,
+		.pm = pm_sleep_ptr(&uda1342_pm_ops),
+	 },
+	.probe = uda1342_i2c_probe,
+	.id_table = uda1342_i2c_id,
+};
+module_i2c_driver(uda1342_i2c_driver);
+
+MODULE_DESCRIPTION("UDA1342 ALSA soc codec driver");
+MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <[e-mail]>");
+MODULE_AUTHOR("Binbin Zhou <[e-mail]>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/uda1342.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Audio support for NXP UDA1342
+ *
+ * Copyright (c) 2005 Giorgio Padrin <[e-mail]>
+ * Copyright (c) 2024 Binbin Zhou <[e-mail]>
+ */
+
+#ifndef _UDA1342_H
+#define _UDA1342_H
+
+#define UDA1342_CLK		0x00
+#define UDA1342_IFACE		0x01
+#define UDA1342_PM		0x02
+#define UDA1342_AMIX		0x03
+#define UDA1342_HP		0x04
+#define UDA1342_MVOL		0x11
+#define UDA1342_MIXVOL		0x12
+#define UDA1342_MODE		0x12
+#define UDA1342_DEEMP		0x13
+#define UDA1342_MIXER		0x14
+#define UDA1342_INTSTAT		0x18
+#define UDA1342_DEC		0x20
+#define UDA1342_PGA		0x21
+#define UDA1342_ADC		0x22
+#define UDA1342_AGC		0x23
+#define UDA1342_DECSTAT		0x28
+#define UDA1342_RESET		0x7f
+
+/* Register flags */
+#define R00_EN_ADC		0x0800
+#define R00_EN_DEC		0x0400
+#define R00_EN_DAC		0x0200
+#define R00_EN_INT		0x0100
+#define R00_DAC_CLK		0x0010
+#define R01_SFORI_I2S		0x0000
+#define R01_SFORI_LSB16		0x0100
+#define R01_SFORI_LSB18		0x0200
+#define R01_SFORI_LSB20		0x0300
+#define R01_SFORI_MSB		0x0500
+#define R01_SFORI_MASK		0x0700
+#define R01_SFORO_I2S		0x0000
+#define R01_SFORO_LSB16		0x0001
+#define R01_SFORO_LSB18		0x0002
+#define R01_SFORO_LSB20		0x0003
+#define R01_SFORO_LSB24		0x0004
+#define R01_SFORO_MSB		0x0005
+#define R01_SFORO_MASK		0x0007
+#define R01_SEL_SOURCE		0x0040
+#define R01_SIM			0x0010
+#define R02_PON_PLL		0x8000
+#define R02_PON_HP		0x2000
+#define R02_PON_DAC		0x0400
+#define R02_PON_BIAS		0x0100
+#define R02_EN_AVC		0x0080
+#define R02_PON_AVC		0x0040
+#define R02_PON_LNA		0x0010
+#define R02_PON_PGAL		0x0008
+#define R02_PON_ADCL		0x0004
+#define R02_PON_PGAR		0x0002
+#define R02_PON_ADCR		0x0001
+#define R13_MTM			0x4000
+#define R14_SILENCE		0x0080
+#define R14_SDET_ON		0x0040
+#define R21_MT_ADC		0x8000
+#define R22_SEL_LNA		0x0008
+#define R22_SEL_MIC		0x0004
+#define R22_SKIP_DCFIL		0x0002
+#define R23_AGC_EN		0x0001
+
+#define UDA1342_DAI_DUPLEX	0 /* playback and capture on single DAI */
+#define UDA1342_DAI_PLAYBACK	1 /* playback DAI */
+#define UDA1342_DAI_CAPTURE	2 /* capture DAI */
+
+#define STATUS0_DAIFMT_MASK (~(7 << 1))
+#define STATUS0_SYSCLK_MASK (~(3 << 4))
+
+#endif /* _UDA1342_H */

sound/soc/loongson/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0
 menu "SoC Audio for Loongson CPUs"
-	depends on LOONGARCH || COMPILE_TEST
-
-config SND_SOC_LOONGSON_I2S_PCI
-	tristate "Loongson I2S-PCI Device Driver"
-	select REGMAP_MMIO
-	depends on PCI
-	help
-	  Say Y or M if you want to add support for I2S driver for
-	  Loongson I2S controller.
-
-	  The controller is found in loongson bridge chips or SoCs,
-	  and work as a PCI device.
 
 config SND_SOC_LOONGSON_CARD
 	tristate "Loongson Sound Card Driver"
-	select SND_SOC_LOONGSON_I2S_PCI
-	depends on PCI
+	depends on LOONGARCH || COMPILE_TEST
+	select SND_SOC_LOONGSON_I2S_PCI if PCI
+	select SND_SOC_LOONGSON_I2S_PLATFORM if OF
 	help
 	  Say Y or M if you want to add support for SoC audio using
 	  loongson I2S controller.
···
 	  The driver add support for ALSA SoC Audio support using
 	  loongson I2S controller.
 
+config SND_SOC_LOONGSON_I2S_PCI
+	tristate "Loongson I2S-PCI Device Driver"
+	depends on LOONGARCH || COMPILE_TEST
+	select REGMAP_MMIO
+	help
+	  Say Y or M if you want to add support for I2S driver for
+	  Loongson I2S controller.
+
+	  The controller is found in loongson bridge chips or SoCs,
+	  and work as a PCI device.
+
+config SND_SOC_LOONGSON_I2S_PLATFORM
+	tristate "Loongson I2S-PLAT Device Driver"
+	depends on LOONGARCH || COMPILE_TEST
+	select REGMAP_MMIO
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  Say Y or M if you want to add support for I2S driver for
+	  Loongson I2S controller.
+
+	  The controller work as a platform device, we can found it in
+	  Loongson-2K1000 SoCs.
 endmenu

sound/soc/loongson/Makefile

···
 snd-soc-loongson-i2s-pci-y := loongson_i2s_pci.o loongson_i2s.o loongson_dma.o
 obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PCI) += snd-soc-loongson-i2s-pci.o
 
+snd-soc-loongson-i2s-plat-y := loongson_i2s_plat.o loongson_i2s.o
+obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM) += snd-soc-loongson-i2s-plat.o
+
 #Machine Support
 snd-soc-loongson-card-y := loongson_card.o
 obj-$(CONFIG_SND_SOC_LOONGSON_CARD) += snd-soc-loongson-card.o

sound/soc/loongson/loongson_i2s_plat.c

···
+// SPDX-License-Identifier: GPL-2.0
+//
+// Loongson I2S controller master mode dirver(platform device)
+//
+// Copyright (C) 2023-2024 Loongson Technology Corporation Limited
+//
+// Author: Yingkun Meng <[e-mail]>
+//         Binbin Zhou <[e-mail]>
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "loongson_i2s.h"
+
+#define LOONGSON_I2S_RX_DMA_OFFSET	21
+#define LOONGSON_I2S_TX_DMA_OFFSET	18
+
+#define LOONGSON_DMA0_CONF	0x0
+#define LOONGSON_DMA1_CONF	0x1
+#define LOONGSON_DMA2_CONF	0x2
+#define LOONGSON_DMA3_CONF	0x3
+#define LOONGSON_DMA4_CONF	0x4
+
+/* periods_max = PAGE_SIZE / sizeof(struct ls_dma_chan_reg) */
+static const struct snd_pcm_hardware loongson_pcm_hardware = {
+	.info = SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_RESUME |
+		SNDRV_PCM_INFO_PAUSE,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE |
+		   SNDRV_PCM_FMTBIT_S20_3LE |
+		   SNDRV_PCM_FMTBIT_S24_LE,
+	.period_bytes_min = 128,
+	.period_bytes_max = 128 * 1024,
+	.periods_min = 1,
+	.periods_max = 64,
+	.buffer_bytes_max = 1024 * 1024,
+};
+
+static const struct snd_dmaengine_pcm_config loongson_dmaengine_pcm_config = {
+	.pcm_hardware = &loongson_pcm_hardware,
+	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+	.prealloc_buffer_size = 128 * 1024,
+};
+
+static int loongson_pcm_open(struct snd_soc_component *component,
+			     struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (substream->pcm->device & 1) {
+		runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
+		runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
+	}
+
+	if (substream->pcm->device & 2)
+		runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
+				      SNDRV_PCM_INFO_MMAP_VALID);
+	/*
+	 * For mysterious reasons (and despite what the manual says)
+	 * playback samples are lost if the DMA count is not a multiple
+	 * of the DMA burst size.  Let's add a rule to enforce that.
+	 */
+	snd_pcm_hw_constraint_step(runtime, 0,
+				   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
+	snd_pcm_hw_constraint_step(runtime, 0,
+				   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128);
+	snd_pcm_hw_constraint_integer(substream->runtime,
+				      SNDRV_PCM_HW_PARAM_PERIODS);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver loongson_i2s_component_driver = {
+	.name   = LS_I2S_DRVNAME,
+	.open	= loongson_pcm_open,
+};
+
+static const struct regmap_config loongson_i2s_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x14,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static int loongson_i2s_apbdma_config(struct platform_device *pdev)
+{
+	int val;
+	void __iomem *regs;
+
+	regs = devm_platform_ioremap_resource(pdev, 1);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	val = readl(regs);
+	val |= LOONGSON_DMA2_CONF << LOONGSON_I2S_TX_DMA_OFFSET;
+	val |= LOONGSON_DMA3_CONF << LOONGSON_I2S_RX_DMA_OFFSET;
+	writel(val, regs);
+
+	return 0;
+}
+
+static int loongson_i2s_plat_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct loongson_i2s *i2s;
+	struct resource *res;
+	struct clk *i2s_clk;
+	int ret;
+
+	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
+	if (!i2s)
+		return -ENOMEM;
+
+	ret = loongson_i2s_apbdma_config(pdev);
+	if (ret)
+		return ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	i2s->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(i2s->reg_base))
+		return dev_err_probe(dev, PTR_ERR(i2s->reg_base),
+				     "devm_ioremap_resource failed\n");
+
+	i2s->regmap = devm_regmap_init_mmio(dev, i2s->reg_base,
+					    &loongson_i2s_regmap_config);
+	if (IS_ERR(i2s->regmap))
+		return dev_err_probe(dev, PTR_ERR(i2s->regmap),
+				     "devm_regmap_init_mmio failed\n");
+
+	i2s->playback_dma_data.addr = res->start + LS_I2S_TX_DATA;
+	i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	i2s->playback_dma_data.maxburst = 4;
+
+	i2s->capture_dma_data.addr = res->start + LS_I2S_RX_DATA;
+	i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	i2s->capture_dma_data.maxburst = 4;
+
+	i2s_clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(i2s_clk))
+		return dev_err_probe(dev, PTR_ERR(i2s_clk), "clock property invalid\n");
+	i2s->clk_rate = clk_get_rate(i2s_clk);
+
+	dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	dev_set_name(dev, LS_I2S_DRVNAME);
+	dev_set_drvdata(dev, i2s);
+
+	ret = devm_snd_soc_register_component(dev, &loongson_i2s_component_driver,
+					      &loongson_i2s_dai, 1);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to register DAI\n");
+
+	return devm_snd_dmaengine_pcm_register(dev, &loongson_dmaengine_pcm_config,
+					       SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+
+static const struct of_device_id loongson_i2s_ids[] = {
+	{ .compatible = "loongson,ls2k1000-i2s" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, loongson_i2s_ids);
+
+static struct platform_driver loongson_i2s_driver = {
+	.probe = loongson_i2s_plat_probe,
+	.driver = {
+		.name = "loongson-i2s-plat",
+		.pm = pm_sleep_ptr(&loongson_i2s_pm),
+		.of_match_table = loongson_i2s_ids,
+	},
+};
+module_platform_driver(loongson_i2s_driver);
+
+MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver");
+MODULE_AUTHOR("Loongson Technology Corporation Limited");
+MODULE_LICENSE("GPL");