sound: ASoC: add ASoC board driver for Armada 370 DB (74d04c3e) · Commits · 戴 / test

Documentation/devicetree/bindings/sound/armada-370db-audio.txt

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		Device Tree bindings for the Armada 370 DB audio
		================================================

		These Device Tree bindings are used to describe the audio complex
		found on the Armada 370 DB platform.

		Mandatory properties:

		* compatible: must be "marvell,a370db-audio"

		* marvell,audio-controller: a phandle that points to the audio
		controller of the Armada 370 SoC.

		* marvell,audio-codec: a phandle that points to the analog audio
		codec connected to the Armada 370 SoC.

		Example:

		sound {
		compatible = "marvell,a370db-audio";
		marvell,audio-controller = <&audio_controller>;
		marvell,audio-codec = <&audio_codec>;
		status = "okay";
		};

sound/soc/kirkwood/Kconfig

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		@@ -6,6 +6,14 @@ config SND_KIRKWOOD_SOC
		the Kirkwood I2S interface. You will also need to select the
		audio interfaces to support below.

		config SND_KIRKWOOD_SOC_ARMADA370_DB
		tristate "SoC Audio support for Armada 370 DB"
		depends on SND_KIRKWOOD_SOC && (ARCH_MVEBU \|\| COMPILE_TEST) && I2C
		select SND_SOC_CS42L51
		help
		Say Y if you want to add support for SoC audio on
		the Armada 370 Development Board.

		config SND_KIRKWOOD_SOC_OPENRD
		tristate "SoC Audio support for Kirkwood Openrd Client"
		depends on SND_KIRKWOOD_SOC && (MACH_OPENRD_CLIENT \|\| MACH_OPENRD_ULTIMATE \|\| COMPILE_TEST)

sound/soc/kirkwood/Makefile

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		@@ -4,6 +4,8 @@ obj-$(CONFIG_SND_KIRKWOOD_SOC) += snd-soc-kirkwood.o

		snd-soc-openrd-objs := kirkwood-openrd.o
		snd-soc-t5325-objs := kirkwood-t5325.o
		snd-soc-armada-370-db-objs := armada-370-db.o

		obj-$(CONFIG_SND_KIRKWOOD_SOC_ARMADA370_DB) += snd-soc-armada-370-db.o
		obj-$(CONFIG_SND_KIRKWOOD_SOC_OPENRD) += snd-soc-openrd.o
		obj-$(CONFIG_SND_KIRKWOOD_SOC_T5325) += snd-soc-t5325.o

sound/soc/kirkwood/armada-370-db.c

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		/*
		* Copyright (C) 2014 Marvell
		*
		* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License as
		* published by the Free Software Foundation; either version 2 of the
		* License, or (at your option) any later version.
		*/

		#include <linux/module.h>
		#include <linux/moduleparam.h>
		#include <linux/interrupt.h>
		#include <linux/platform_device.h>
		#include <linux/slab.h>
		#include <sound/soc.h>
		#include <linux/of.h>
		#include <linux/platform_data/asoc-kirkwood.h>
		#include "../codecs/cs42l51.h"

		static int a370db_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct snd_soc_dai *codec_dai = rtd->codec_dai;
		unsigned int freq;

		switch (params_rate(params)) {
		default:
		case 44100:
		freq = 11289600;
		break;
		case 48000:
		freq = 12288000;
		break;
		case 96000:
		freq = 24576000;
		break;
		}

		return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
		}

		static struct snd_soc_ops a370db_ops = {
		.hw_params = a370db_hw_params,
		};

		static const struct snd_soc_dapm_widget a370db_dapm_widgets[] = {
		SND_SOC_DAPM_HP("Out Jack", NULL),
		SND_SOC_DAPM_LINE("In Jack", NULL),
		};

		static const struct snd_soc_dapm_route a370db_route[] = {
		{ "Out Jack", NULL, "HPL" },
		{ "Out Jack", NULL, "HPR" },
		{ "AIN1L", NULL, "In Jack" },
		{ "AIN1L", NULL, "In Jack" },
		};

		static struct snd_soc_dai_link a370db_dai[] = {
		{
		.name = "CS42L51",
		.stream_name = "analog",
		.cpu_dai_name = "i2s",
		.codec_dai_name = "cs42l51-hifi",
		.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS,
		.ops = &a370db_ops,
		},
		};

		static struct snd_soc_card a370db = {
		.name = "a370db",
		.owner = THIS_MODULE,
		.dai_link = a370db_dai,
		.num_links = ARRAY_SIZE(a370db_dai),
		.dapm_widgets = a370db_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(a370db_dapm_widgets),
		.dapm_routes = a370db_route,
		.num_dapm_routes = ARRAY_SIZE(a370db_route),
		};

		static int a370db_probe(struct platform_device *pdev)
		{
		struct snd_soc_card *card = &a370db;

		card->dev = &pdev->dev;

		a370db_dai[0].cpu_of_node =
		of_parse_phandle(pdev->dev.of_node,
		"marvell,audio-controller", 0);
		a370db_dai[0].platform_of_node = a370db_dai[0].cpu_of_node;

		a370db_dai[0].codec_of_node =
		of_parse_phandle(pdev->dev.of_node,
		"marvell,audio-codec", 0);

		return devm_snd_soc_register_card(card->dev, card);
		}

		static const struct of_device_id a370db_dt_ids[] = {
		{ .compatible = "marvell,a370db-audio" },
		{ },
		};

		static struct platform_driver a370db_driver = {
		.driver = {
		.name = "a370db-audio",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(a370db_dt_ids),
		},
		.probe = a370db_probe,
		};

		module_platform_driver(a370db_driver);

		MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");
		MODULE_DESCRIPTION("ALSA SoC a370db audio client");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("platform:a370db-audio");

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