new file mode 100644
@@ -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>;
+};
@@ -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
@@ -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
new file mode 100644
@@ -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@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@nuvoton.com>");
+MODULE_LICENSE("GPL v2");
Add codec driver for Nuvoton NAU8315. Signed-off-by: David Lin <CTLIN0@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 -- 2.25.1 =========================================================================================== The privileged confidential information contained in this email is intended for use only by the addressees as indicated by the original sender of this email. If you are not the addressee indicated in this email or are not responsible for delivery of the email to such a person, please kindly reply to the sender indicating this fact and delete all copies of it from your computer and network server immediately. Your cooperation is highly appreciated. It is advised that any unauthorized use of confidential information of Nuvoton is strictly prohibited; and any information in this email irrelevant to the official business of Nuvoton shall be deemed as neither given nor endorsed by Nuvoton.