[PATCH v1 2/2] ASoC: tegra: Support WM8994 by machine driver

[Svyatoslav Ryhel <clamor95@gmail.com>]

Add Wolfson Microelectronics WM8994 codec support to the Tegra ASoC
machine driver. The WM8994 codec is found on devices like LG Optimus 2X
(P990/star) and Samsung Captivate Glide (SGH-i927).

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 sound/soc/tegra/Kconfig        |  10 ++
 sound/soc/tegra/Makefile       |   2 +
 sound/soc/tegra/tegra_wm8994.c | 169 +++++++++++++++++++++++++++++++++
 3 files changed, 181 insertions(+)
 create mode 100644 sound/soc/tegra/tegra_wm8994.c

diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index fdc954028d622..dd3b2d3d6c4c9 100644
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -239,6 +239,16 @@ config SND_SOC_TEGRA_WM8962
 	  boards using the WM8962 codec. Currently, the supported boards are
 	  Microsoft Surface RT.
 
+config SND_SOC_TEGRA_WM8994
+	tristate "SoC Audio support for Tegra boards using a WM8994 codec"
+	depends on I2C && GPIOLIB && MFD_WM8994
+	select SND_SOC_TEGRA_MACHINE_DRV
+	select SND_SOC_WM8994
+	help
+	  Say Y or M here if you want to add support for SoC audio on Tegra
+	  boards using the WM8994 codec. Currently, the supported boards are
+	  LG Optimus X2 P990 and Samsung Captivate Glide (SGH-i927).
+
 config SND_SOC_TEGRA_WM9712
 	tristate "SoC Audio support for Tegra boards using a WM9712 codec"
 	depends on GPIOLIB
diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index 1c18ef6971c09..b8f90149bfa63 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -43,10 +43,12 @@ obj-$(CONFIG_SND_SOC_TEGRA210_OPE) += snd-soc-tegra210-ope.o
 # Tegra machine Support
 snd-soc-tegra-wm8903-y := tegra_wm8903.o
 snd-soc-tegra-wm8962-y := tegra_wm8962.o
+snd-soc-tegra-wm8994-y := tegra_wm8994.o
 snd-soc-tegra-machine-y := tegra_asoc_machine.o
 snd-soc-tegra-audio-graph-card-y := tegra_audio_graph_card.o
 
 obj-$(CONFIG_SND_SOC_TEGRA_WM8903) += snd-soc-tegra-wm8903.o
 obj-$(CONFIG_SND_SOC_TEGRA_WM8962) += snd-soc-tegra-wm8962.o
+obj-$(CONFIG_SND_SOC_TEGRA_WM8994) += snd-soc-tegra-wm8994.o
 obj-$(CONFIG_SND_SOC_TEGRA_MACHINE_DRV) += snd-soc-tegra-machine.o
 obj-$(CONFIG_SND_SOC_TEGRA_AUDIO_GRAPH_CARD) += snd-soc-tegra-audio-graph-card.o
diff --git a/sound/soc/tegra/tegra_wm8994.c b/sound/soc/tegra/tegra_wm8994.c
new file mode 100644
index 0000000000000..950fa6ad388f9
--- /dev/null
+++ b/sound/soc/tegra/tegra_wm8994.c
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * tegra_wm8994.c - Tegra machine ASoC driver for boards using WM8994 codec.
+ *
+ * Copyright (C) 2026 Svyatoslav Ryhel <clamor95@gmail.com>
+ *
+ * Based on tegra_wm8994 code copyright/by:
+ *
+ * Author: Sumit Bhattacharya <sumitb@nvidia.com>
+ * Copyright (C) 2010-2011 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm8994.h"
+
+#include "tegra_asoc_machine.h"
+
+static struct snd_soc_jack_pin tegra_wm8994_mic_jack_pins[] = {
+	{ .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
+};
+
+static unsigned int tegra_wm8994_mclk_rate(unsigned int srate)
+{
+	unsigned int mclk;
+
+	switch (srate) {
+	case 8000:
+	case 16000:
+	case 24000:
+	case 32000:
+	case 48000:
+	case 64000:
+	case 96000:
+		mclk = 12288000;
+		break;
+	case 11025:
+	case 22050:
+	case 44100:
+	case 88200:
+		mclk = 11289600;
+		break;
+	default:
+		mclk = 12000000;
+		break;
+	}
+
+	return mclk;
+}
+
+static const struct snd_kcontrol_new tegra_wm8994_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Int Spk"),
+	SOC_DAPM_PIN_SWITCH("Internal Mic 1"),
+	SOC_DAPM_PIN_SWITCH("Internal Mic 2"),
+	SOC_DAPM_PIN_SWITCH("Mic Jack"),
+	SOC_DAPM_PIN_SWITCH("Line Out"),
+	SOC_DAPM_PIN_SWITCH("FM Radio"),
+};
+
+static int tegra_wm8994_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
+	int err;
+
+	err = tegra_asoc_machine_init(rtd);
+	if (err)
+		return err;
+
+	if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
+		struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
+		struct snd_soc_component *component = codec_dai->component;
+
+		err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
+						 SND_JACK_MICROPHONE,
+						 machine->mic_jack,
+						 tegra_wm8994_mic_jack_pins,
+						 ARRAY_SIZE(tegra_wm8994_mic_jack_pins));
+		if (err) {
+			dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
+			return err;
+		}
+
+		wm8994_mic_detect(component, machine->mic_jack, 1);
+	}
+
+	return 0;
+}
+
+static int tegra_wm8994_remove(struct snd_soc_card *card)
+{
+	struct snd_soc_dai_link *link = &card->dai_link[0];
+	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
+	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
+	struct snd_soc_component *component = codec_dai->component;
+
+	wm8994_mic_detect(component, NULL, 0);
+
+	return 0;
+}
+
+SND_SOC_DAILINK_DEFS(wm8994_hifi,
+	DAILINK_COMP_ARRAY(COMP_EMPTY()),
+	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link tegra_wm8994_dai = {
+	.name = "WM8994",
+	.stream_name = "WM8994 PCM",
+	.init = tegra_wm8994_init,
+	.dai_fmt = SND_SOC_DAIFMT_I2S |
+		   SND_SOC_DAIFMT_NB_NF |
+		   SND_SOC_DAIFMT_CBC_CFC,
+	SND_SOC_DAILINK_REG(wm8994_hifi),
+};
+
+static struct snd_soc_card snd_soc_tegra_wm8994 = {
+	.components = "codec:wm8994",
+	.dai_link = &tegra_wm8994_dai,
+	.num_links = 1,
+	.controls = tegra_wm8994_controls,
+	.num_controls = ARRAY_SIZE(tegra_wm8994_controls),
+	.remove = tegra_wm8994_remove,
+	.fully_routed = true,
+};
+
+static const struct tegra_asoc_data tegra_wm8994_data = {
+	.mclk_rate = tegra_wm8994_mclk_rate,
+	.mclk_id = WM8994_SYSCLK_MCLK1,
+	.card = &snd_soc_tegra_wm8994,
+	.add_common_dapm_widgets = true,
+	.add_common_snd_ops = true,
+	.add_mic_jack = true,
+	.add_hp_jack = true,
+};
+
+static const struct of_device_id tegra_wm8994_of_match[] = {
+	{ .compatible = "nvidia,tegra-audio-wm8994", .data = &tegra_wm8994_data },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, tegra_wm8994_of_match);
+
+static struct platform_driver tegra_wm8994_driver = {
+	.driver = {
+		.name = "tegra-wm8994",
+		.of_match_table = tegra_wm8994_of_match,
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = tegra_asoc_machine_probe,
+};
+module_platform_driver(tegra_wm8994_driver);
+
+MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>");
+MODULE_DESCRIPTION("Tegra+WM8994 machine ASoC driver");
+MODULE_LICENSE("GPL");
-- 
2.53.0