diff mbox series

ASoC: nau8315: add codec driver

Message ID 20201030050146.535983-1-CTLIN0@nuvoton.com
State Superseded
Headers show
Series ASoC: nau8315: add codec driver | expand

Commit Message

David Lin Oct. 30, 2020, 5:01 a.m. UTC
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



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Comments

Mark Brown Oct. 30, 2020, 1:25 p.m. UTC | #1
On Fri, Oct 30, 2020 at 01:01:48PM +0800, David Lin wrote:
> Add codec driver for Nuvoton NAU8315.

This has still got issues - it looks like all the tabs in the patch have
been replaced by spaces, that's going to make it impossible for any of
the tools to handle.  I'm not sure how your colleagues handled this,
another approach some people use is to send from a non-work account and
bypass all the issues with corporate mail servers :/
David Lin Nov. 1, 2020, 5:59 a.m. UTC | #2
On 2020/10/30 下午 09:25, Mark Brown wrote:
> On Fri, Oct 30, 2020 at 01:01:48PM +0800, David Lin wrote:
>> Add codec driver for Nuvoton NAU8315.
> This has still got issues - it looks like all the tabs in the patch have
> been replaced by spaces, that's going to make it impossible for any of
> the tools to handle.  I'm not sure how your colleagues handled this,
> another approach some people use is to send from a non-work account and
> bypass all the issues with corporate mail servers :/
After checking with the administrator of mail server, he think it might
be the related setting not transfer to new IP due to office relocation
recent.

I am sorry to have confused you. I will resend after the setting of mail
server is ready.
diff mbox series

Patch

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@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");