From 13ddc845b271d7cc79bcbdd288f95c03ea927b89 Mon Sep 17 00:00:00 2001
From: Florian Meier <florian.meier@koalo.de>
Date: Mon, 25 Jan 2016 15:48:59 +0000
Subject: [PATCH] ASoC: Add support for Rpi-DAC

---
 sound/soc/codecs/Kconfig    |  5 +++
 sound/soc/codecs/Makefile   |  2 ++
 sound/soc/codecs/pcm1794a.c | 69 +++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+)
 create mode 100644 sound/soc/codecs/pcm1794a.c

--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -118,6 +118,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_PCM179X_SPI if SPI_MASTER
 	select SND_SOC_PCM186X_I2C if I2C
 	select SND_SOC_PCM186X_SPI if SPI_MASTER
+	select SND_SOC_PCM1794A if I2C
 	select SND_SOC_PCM3008
 	select SND_SOC_PCM3168A_I2C if I2C
 	select SND_SOC_PCM3168A_SPI if SPI_MASTER
@@ -834,6 +835,10 @@ config SND_SOC_RT5616
 	tristate "Realtek RT5616 CODEC"
 	depends on I2C
 
+config SND_SOC_PCM1794A
+	tristate
+	depends on I2C
+
 config SND_SOC_RT5631
 	tristate "Realtek ALC5631/RT5631 CODEC"
 	depends on I2C
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -118,6 +118,7 @@ snd-soc-pcm179x-spi-objs := pcm179x-spi.
 snd-soc-pcm186x-objs := pcm186x.o
 snd-soc-pcm186x-i2c-objs := pcm186x-i2c.o
 snd-soc-pcm186x-spi-objs := pcm186x-spi.o
+snd-soc-pcm1794a-objs := pcm1794a.o
 snd-soc-pcm3008-objs := pcm3008.o
 snd-soc-pcm3168a-objs := pcm3168a.o
 snd-soc-pcm3168a-i2c-objs := pcm3168a-i2c.o
@@ -386,6 +387,7 @@ obj-$(CONFIG_SND_SOC_PCM5102A)	+= snd-so
 obj-$(CONFIG_SND_SOC_PCM512x)	+= snd-soc-pcm512x.o
 obj-$(CONFIG_SND_SOC_PCM512x_I2C)	+= snd-soc-pcm512x-i2c.o
 obj-$(CONFIG_SND_SOC_PCM512x_SPI)	+= snd-soc-pcm512x-spi.o
+obj-$(CONFIG_SND_SOC_PCM1794A)	+= snd-soc-pcm1794a.o
 obj-$(CONFIG_SND_SOC_RL6231)	+= snd-soc-rl6231.o
 obj-$(CONFIG_SND_SOC_RL6347A)	+= snd-soc-rl6347a.o
 obj-$(CONFIG_SND_SOC_RT1305)	+= snd-soc-rt1305.o
--- /dev/null
+++ b/sound/soc/codecs/pcm1794a.c
@@ -0,0 +1,69 @@
+/*
+ * Driver for the PCM1794A codec
+ *
+ * Author:	Florian Meier <florian.meier@koalo.de>
+ *		Copyright 2013
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/soc.h>
+
+static struct snd_soc_dai_driver pcm1794a_dai = {
+	.name = "pcm1794a-hifi",
+	.playback = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE |
+			   SNDRV_PCM_FMTBIT_S24_LE
+	},
+};
+
+static struct snd_soc_component_driver soc_component_dev_pcm1794a;
+
+static int pcm1794a_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_component(&pdev->dev, &soc_component_dev_pcm1794a,
+			&pcm1794a_dai, 1);
+}
+
+static int pcm1794a_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_component(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id pcm1794a_of_match[] = {
+	{ .compatible = "ti,pcm1794a", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pcm1794a_of_match);
+
+static struct platform_driver pcm1794a_component_driver = {
+	.probe 		= pcm1794a_probe,
+	.remove 	= pcm1794a_remove,
+	.driver		= {
+		.name	= "pcm1794a-codec",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(pcm1794a_of_match),
+	},
+};
+
+module_platform_driver(pcm1794a_component_driver);
+
+MODULE_DESCRIPTION("ASoC PCM1794A codec driver");
+MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
+MODULE_LICENSE("GPL v2");