new file mode 100644
@@ -0,0 +1,24 @@
+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";
+ };
@@ -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)
@@ -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
new file mode 100644
@@ -0,0 +1,120 @@
+/*
+ * 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");
This commit adds a simple ASoC board driver fo the Armada 370 Development Board, which connects the audio unit of the Armada 370 SoC to the I2C-based CS42L51. For now, only the analog audio input and output through the CS42L51 are supported, but a followup patch adds S/PDIF support to this driver. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> --- .../bindings/sound/armada-370db-audio.txt | 24 +++++ sound/soc/kirkwood/Kconfig | 8 ++ sound/soc/kirkwood/Makefile | 2 + sound/soc/kirkwood/armada-370-db.c | 120 +++++++++++++++++++++ 4 files changed, 154 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/armada-370db-audio.txt create mode 100644 sound/soc/kirkwood/armada-370-db.c