ASoC: add simple-mux (342fbb75) · Commits · 戴 / test

sound/soc/codecs/Kconfig

+5 −0

Original line number	Diff line number	Diff line
		@@ -185,6 +185,7 @@ config SND_SOC_ALL_CODECS
		imply SND_SOC_SGTL5000
		imply SND_SOC_SI476X
		imply SND_SOC_SIMPLE_AMPLIFIER
		imply SND_SOC_SIMPLE_MUX
		imply SND_SOC_SIRF_AUDIO_CODEC
		imply SND_SOC_SPDIF
		imply SND_SOC_SSM2305
		@@ -1266,6 +1267,10 @@ config SND_SOC_SIMPLE_AMPLIFIER
		tristate "Simple Audio Amplifier"
		select GPIOLIB

		config SND_SOC_SIMPLE_MUX
		tristate "Simple Audio Mux"
		select GPIOLIB

		config SND_SOC_SIRF_AUDIO_CODEC
		tristate "SiRF SoC internal audio codec"
		select REGMAP_MMIO

sound/soc/codecs/Makefile

+5 −0

Original line number	Diff line number	Diff line
		@@ -312,6 +312,8 @@ snd-soc-tpa6130a2-objs := tpa6130a2.o
		snd-soc-tas2552-objs := tas2552.o
		snd-soc-tas2562-objs := tas2562.o
		snd-soc-tas2764-objs := tas2764.o
		# Mux
		snd-soc-simple-mux-objs := simple-mux.o

		obj-$(CONFIG_SND_SOC_88PM860X) += snd-soc-88pm860x.o
		obj-$(CONFIG_SND_SOC_AB8500_CODEC) += snd-soc-ab8500-codec.o
		@@ -627,3 +629,6 @@ obj-$(CONFIG_SND_SOC_SIMPLE_AMPLIFIER) += snd-soc-simple-amplifier.o
		obj-$(CONFIG_SND_SOC_TPA6130A2) += snd-soc-tpa6130a2.o
		obj-$(CONFIG_SND_SOC_LPASS_WSA_MACRO) += snd-soc-lpass-wsa-macro.o
		obj-$(CONFIG_SND_SOC_LPASS_VA_MACRO) += snd-soc-lpass-va-macro.o

		# Mux
		obj-$(CONFIG_SND_SOC_SIMPLE_MUX) += snd-soc-simple-mux.o

sound/soc/codecs/simple-mux.c

0 → 100644

+124 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2020 Bootlin SA
		* Author: Alexandre Belloni <alexandre.belloni@bootlin.com>
		*/

		#include <linux/gpio/consumer.h>
		#include <linux/module.h>
		#include <linux/regulator/consumer.h>
		#include <sound/soc.h>

		struct simple_mux {
		struct gpio_desc *gpiod_mux;
		unsigned int mux;
		};

		static const char * const simple_mux_texts[] = {
		"Input 1", "Input 2"
		};

		static SOC_ENUM_SINGLE_EXT_DECL(simple_mux_enum, simple_mux_texts);

		static int simple_mux_control_get(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
		struct snd_soc_component *c = snd_soc_dapm_to_component(dapm);
		struct simple_mux *priv = snd_soc_component_get_drvdata(c);

		ucontrol->value.enumerated.item[0] = priv->mux;

		return 0;
		}

		static int simple_mux_control_put(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
		struct soc_enum e = (struct soc_enum )kcontrol->private_value;
		struct snd_soc_component *c = snd_soc_dapm_to_component(dapm);
		struct simple_mux *priv = snd_soc_component_get_drvdata(c);

		if (ucontrol->value.enumerated.item[0] > e->items)
		return -EINVAL;

		if (priv->mux == ucontrol->value.enumerated.item[0])
		return 0;

		priv->mux = ucontrol->value.enumerated.item[0];

		gpiod_set_value_cansleep(priv->gpiod_mux, priv->mux);

		return snd_soc_dapm_mux_update_power(dapm, kcontrol,
		ucontrol->value.enumerated.item[0],
		e, NULL);
		}

		static const struct snd_kcontrol_new simple_mux_mux =
		SOC_DAPM_ENUM_EXT("Muxer", simple_mux_enum, simple_mux_control_get, simple_mux_control_put);

		static const struct snd_soc_dapm_widget simple_mux_dapm_widgets[] = {
		SND_SOC_DAPM_INPUT("IN1"),
		SND_SOC_DAPM_INPUT("IN2"),
		SND_SOC_DAPM_MUX("MUX", SND_SOC_NOPM, 0, 0, &simple_mux_mux),
		SND_SOC_DAPM_OUTPUT("OUT"),
		};

		static const struct snd_soc_dapm_route simple_mux_dapm_routes[] = {
		{ "OUT", NULL, "MUX" },
		{ "MUX", "Input 1", "IN1" },
		{ "MUX", "Input 2", "IN2" },
		};

		static const struct snd_soc_component_driver simple_mux_component_driver = {
		.dapm_widgets = simple_mux_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(simple_mux_dapm_widgets),
		.dapm_routes = simple_mux_dapm_routes,
		.num_dapm_routes = ARRAY_SIZE(simple_mux_dapm_routes),
		};

		static int simple_mux_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct simple_mux *priv;
		int err;

		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
		if (!priv)
		return -ENOMEM;

		dev_set_drvdata(dev, priv);

		priv->gpiod_mux = devm_gpiod_get(dev, "mux", GPIOD_OUT_LOW);
		if (IS_ERR(priv->gpiod_mux)) {
		err = PTR_ERR(priv->gpiod_mux);
		if (err != -EPROBE_DEFER)
		dev_err(dev, "Failed to get 'mux' gpio: %d", err);
		return err;
		}

		return devm_snd_soc_register_component(dev, &simple_mux_component_driver, NULL, 0);
		}

		#ifdef CONFIG_OF
		static const struct of_device_id simple_mux_ids[] = {
		{ .compatible = "simple-audio-mux", },
		{ }
		};
		MODULE_DEVICE_TABLE(of, simple_mux_ids);
		#endif

		static struct platform_driver simple_mux_driver = {
		.driver = {
		.name = "simple-mux",
		.of_match_table = of_match_ptr(simple_mux_ids),
		},
		.probe = simple_mux_probe,
		};

		module_platform_driver(simple_mux_driver);

		MODULE_DESCRIPTION("ASoC Simple Audio Mux driver");
		MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@bootlin.com>");
		MODULE_LICENSE("GPL");

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