Add codec driver for Nuvoton NAU8315.
Signed-off-by: David Lin <CTLIN0(a)nuvoton.com>
---
.../devicetree/bindings/sound/nau8315.txt | 18 ++
sound/soc/codecs/Kconfig | 5 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/nau8315.c | 166 ++++++++++++++++++
4 files changed, 191 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/nau8315.txt
create mode 100644 sound/soc/codecs/nau8315.c
diff --git a/Documentation/devicetree/bindings/sound/nau8315.txt b/Documentation/devicetree/bindings/sound/nau8315.txt
new file mode 100644
index 000000000000..6eaec46f384c
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/nau8315.txt
@@ -0,0 +1,18 @@
+Nuvoton NAU8315 Mono Class-D Amplifier
+
+Required properties:
+- compatible : "nuvoton,nau8315"
+
+Optional properties:
+- enable-gpios : GPIO specifier for the chip's device enable input(EN) pin.
+ If this option is not specified then driver does not manage
+ the pin state (e.g. chip is always on).
+
+Example:
+
+#include <dt-bindings/gpio/gpio.h>
+
+nau8315 {
+ compatible = "nuvoton,nau8315";
+ enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
+};
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 5791b7056af6..2b6eceb3573c 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -130,6 +130,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_MT6358
imply SND_SOC_MT6359
imply SND_SOC_MT6660
+ imply SND_SOC_NAU8315
imply SND_SOC_NAU8540
imply SND_SOC_NAU8810
imply SND_SOC_NAU8822
@@ -1760,6 +1761,10 @@ config SND_SOC_MT6660
Select N if you don't have MT6660 on board.
Select M to build this as module.
+config SND_SOC_NAU8315
+ tristate "Nuvoton Technology Corporation NAU8315 CODEC"
+ depends on GPIOLIB
+
config SND_SOC_NAU8540
tristate "Nuvoton Technology Corporation NAU85L40 CODEC"
depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 11ce98c25d6c..144d9256d4d5 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -129,6 +129,7 @@ snd-soc-mt6351-objs := mt6351.o
snd-soc-mt6358-objs := mt6358.o
snd-soc-mt6359-objs := mt6359.o
snd-soc-mt6660-objs := mt6660.o
+snd-soc-nau8315-objs := nau8315.o
snd-soc-nau8540-objs := nau8540.o
snd-soc-nau8810-objs := nau8810.o
snd-soc-nau8822-objs := nau8822.o
@@ -438,6 +439,7 @@ obj-$(CONFIG_SND_SOC_MT6351) += snd-soc-mt6351.o
obj-$(CONFIG_SND_SOC_MT6358) += snd-soc-mt6358.o
obj-$(CONFIG_SND_SOC_MT6359) += snd-soc-mt6359.o
obj-$(CONFIG_SND_SOC_MT6660) += snd-soc-mt6660.o
+obj-$(CONFIG_SND_SOC_NAU8315) += snd-soc-nau8315.o
obj-$(CONFIG_SND_SOC_NAU8540) += snd-soc-nau8540.o
obj-$(CONFIG_SND_SOC_NAU8810) += snd-soc-nau8810.o
obj-$(CONFIG_SND_SOC_NAU8822) += snd-soc-nau8822.o
diff --git a/sound/soc/codecs/nau8315.c b/sound/soc/codecs/nau8315.c
new file mode 100644
index 000000000000..e6bc5c0a5036
--- /dev/null
+++ b/sound/soc/codecs/nau8315.c
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// nau8315.c -- NAU8315 ALSA SoC Audio Amplifier Driver
+//
+// Copyright 2020 Nuvoton Technology Crop.
+//
+// Author: David Lin <ctlin0(a)nuvoton.com>
+//
+// Based on MAX98357A.c
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/soc-dapm.h>
+
+struct nau8315_priv {
+ struct gpio_desc *enable;
+ int enpin_switch;
+};
+
+static int nau8315_daiops_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct nau8315_priv *nau8315 =
+ snd_soc_component_get_drvdata(component);
+
+ if (!nau8315->enable)
+ return 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (nau8315->enpin_switch) {
+ gpiod_set_value(nau8315->enable, 1);
+ dev_dbg(component->dev, "set enable to 1");
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ gpiod_set_value(nau8315->enable, 0);
+ dev_dbg(component->dev, "set enable to 0");
+ break;
+ }
+
+ return 0;
+}
+
+static int nau8315_enpin_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *component =
+ snd_soc_dapm_to_component(w->dapm);
+ struct nau8315_priv *nau8315 =
+ snd_soc_component_get_drvdata(component);
+
+ if (event & SND_SOC_DAPM_POST_PMU)
+ nau8315->enpin_switch = 1;
+ else if (event & SND_SOC_DAPM_POST_PMD)
+ nau8315->enpin_switch = 0;
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget nau8315_dapm_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("Speaker"),
+ SND_SOC_DAPM_OUT_DRV_E("EN_Pin", SND_SOC_NOPM, 0, 0, NULL, 0,
+ nau8315_enpin_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route nau8315_dapm_routes[] = {
+ {"EN_Pin", NULL, "HiFi Playback"},
+ {"Speaker", NULL, "EN_Pin"},
+};
+
+static const struct snd_soc_component_driver nau8315_component_driver = {
+ .dapm_widgets = nau8315_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(nau8315_dapm_widgets),
+ .dapm_routes = nau8315_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(nau8315_dapm_routes),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static const struct snd_soc_dai_ops nau8315_dai_ops = {
+ .trigger = nau8315_daiops_trigger,
+};
+
+#define NAU8315_RATES SNDRV_PCM_RATE_8000_96000
+#define NAU8315_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE)
+
+static struct snd_soc_dai_driver nau8315_dai_driver = {
+ .name = "nau8315-hifi",
+ .playback = {
+ .stream_name = "HiFi Playback",
+ .formats = NAU8315_FORMATS,
+ .rates = NAU8315_RATES,
+ .channels_min = 1,
+ .channels_max = 2,
+ },
+ .ops = &nau8315_dai_ops,
+};
+
+static int nau8315_platform_probe(struct platform_device *pdev)
+{
+ struct nau8315_priv *nau8315;
+
+ nau8315 = devm_kzalloc(&pdev->dev, sizeof(*nau8315), GFP_KERNEL);
+ if (!nau8315)
+ return -ENOMEM;
+
+ nau8315->enable = devm_gpiod_get_optional(&pdev->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(nau8315->enable))
+ return PTR_ERR(nau8315->enable);
+
+ dev_set_drvdata(&pdev->dev, nau8315);
+
+ return devm_snd_soc_register_component(&pdev->dev,
+ &nau8315_component_driver,
+ &nau8315_dai_driver, 1);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id nau8315_device_id[] = {
+ { .compatible = "nuvoton,nau8315" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, nau8315_device_id);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id nau8315_acpi_match[] = {
+ { "NVTN2010", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, nau8315_acpi_match);
+#endif
+
+static struct platform_driver nau8315_platform_driver = {
+ .driver = {
+ .name = "nau8315",
+ .of_match_table = of_match_ptr(nau8315_device_id),
+ .acpi_match_table = ACPI_PTR(nau8315_acpi_match),
+ },
+ .probe = nau8315_platform_probe,
+};
+module_platform_driver(nau8315_platform_driver);
+
+MODULE_DESCRIPTION("ASoC NAU8315 Mono Class-D Amplifier Driver");
+MODULE_AUTHOR("David Lin <ctlin0(a)nuvoton.com>");
+MODULE_LICENSE("GPL v2");
--
2.25.1
===========================================================================================
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