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From 81ddd8a5dbf200938ef70efaa9254742f49d3034 Mon Sep 17 00:00:00 2001
From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Date: Thu, 10 Aug 2017 16:29:01 +0300
Subject: [PATCH] ASoC: add dummy device for WL18xx PCM audio

Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
---
 sound/soc/codecs/Kconfig  |  3 ++
 sound/soc/codecs/Makefile |  2 ++
 sound/soc/codecs/wl18xx.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 sound/soc/codecs/wl18xx.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 140f1597966a..6658d05f1648 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -625,6 +625,9 @@ config SND_SOC_PCM3168A_SPI
 config SND_SOC_SI468X
 	tristate "Dummy sound driver for Si468x radio"
 
+config SND_SOC_WL18XX
+	tristate "Dummy sound driver for WL18xx BT"
+
 config SND_SOC_PCM5102A
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 8e02341428d8..17fd313489de 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -126,6 +126,7 @@ snd-soc-sigmadsp-i2c-objs := sigmadsp-i2c.o
 snd-soc-sigmadsp-regmap-objs := sigmadsp-regmap.o
 snd-soc-si476x-objs := si476x.o
 snd-soc-si468x-objs := si468x.o
+snd-soc-wl18xx-objs := wl18xx.o
 snd-soc-sirf-audio-codec-objs := sirf-audio-codec.o
 snd-soc-sn95031-objs := sn95031.o
 snd-soc-spdif-tx-objs := spdif_transmitter.o
@@ -349,6 +350,7 @@ obj-$(CONFIG_SND_SOC_SIGMADSP_I2C)	+= snd-soc-sigmadsp-i2c.o
 obj-$(CONFIG_SND_SOC_SIGMADSP_REGMAP)	+= snd-soc-sigmadsp-regmap.o
 obj-$(CONFIG_SND_SOC_SI476X)	+= snd-soc-si476x.o
 obj-$(CONFIG_SND_SOC_SI468X)	+= snd-soc-si468x.o
+obj-$(CONFIG_SND_SOC_WL18XX)	+= snd-soc-wl18xx.o
 obj-$(CONFIG_SND_SOC_SN95031)	+=snd-soc-sn95031.o
 obj-$(CONFIG_SND_SOC_SPDIF)	+= snd-soc-spdif-rx.o snd-soc-spdif-tx.o
 obj-$(CONFIG_SND_SOC_SSM2518)	+= snd-soc-ssm2518.o
diff --git a/sound/soc/codecs/wl18xx.c b/sound/soc/codecs/wl18xx.c
new file mode 100644
index 000000000000..50ebbd4c0013
--- /dev/null
+++ b/sound/soc/codecs/wl18xx.c
@@ -0,0 +1,72 @@
+/*
+ * Dummy sound driver for wl18xx BT modules
+ * Copyright 2016 Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+ *
+ * Based on: Driver for the DFBM-CS320 bluetooth module
+ * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
+ *
+ *  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/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/soc.h>
+
+static struct snd_soc_dai_driver wl18xx_dai = {
+	.name = "wl18xx-pcm",
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+	.playback = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_wl18xx;
+
+static int wl18xx_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl18xx,
+			&wl18xx_dai, 1);
+}
+
+static int wl18xx_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id wl18xx_of_match[] = {
+	{ .compatible = "ti,wl18xx-pcm", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wl18xx_of_match);
+
+static struct platform_driver wl18xx_driver = {
+	.driver = {
+		.name = "wl18xx-codec",
+		.of_match_table = wl18xx_of_match,
+		.owner = THIS_MODULE,
+	},
+	.probe = wl18xx_probe,
+	.remove = wl18xx_remove,
+};
+
+module_platform_driver(wl18xx_driver);
+
+MODULE_AUTHOR("Andrey Gusakov <andrey.gusakov@cogentembedded.com>");
+MODULE_DESCRIPTION("ASoC wl18xx driver");
+MODULE_LICENSE("GPL");
-- 
2.13.0