Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/kernel/sound/soc/codecs/adau1761-spi.c b/kernel/sound/soc/codecs/adau1761-spi.c
new file mode 100644
index 000000000..cce2f11f1
--- /dev/null
+++ b/kernel/sound/soc/codecs/adau1761-spi.c
@@ -0,0 +1,77 @@
+/*
+ * Driver for ADAU1761/ADAU1461/ADAU1761/ADAU1961 codec
+ *
+ * Copyright 2014 Analog Devices Inc.
+ *  Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <sound/soc.h>
+
+#include "adau1761.h"
+
+static void adau1761_spi_switch_mode(struct device *dev)
+{
+	struct spi_device *spi = to_spi_device(dev);
+
+	/*
+	 * To get the device into SPI mode CLATCH has to be pulled low three
+	 * times.  Do this by issuing three dummy reads.
+	 */
+	spi_w8r8(spi, 0x00);
+	spi_w8r8(spi, 0x00);
+	spi_w8r8(spi, 0x00);
+}
+
+static int adau1761_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap_config config;
+
+	if (!id)
+		return -EINVAL;
+
+	config = adau1761_regmap_config;
+	config.val_bits = 8;
+	config.reg_bits = 24;
+	config.read_flag_mask = 0x1;
+
+	return adau1761_probe(&spi->dev,
+		devm_regmap_init_spi(spi, &config),
+		id->driver_data, adau1761_spi_switch_mode);
+}
+
+static int adau1761_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	return 0;
+}
+
+static const struct spi_device_id adau1761_spi_id[] = {
+	{ "adau1361", ADAU1361 },
+	{ "adau1461", ADAU1761 },
+	{ "adau1761", ADAU1761 },
+	{ "adau1961", ADAU1361 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, adau1761_spi_id);
+
+static struct spi_driver adau1761_spi_driver = {
+	.driver = {
+		.name = "adau1761",
+		.owner = THIS_MODULE,
+	},
+	.probe = adau1761_spi_probe,
+	.remove = adau1761_spi_remove,
+	.id_table = adau1761_spi_id,
+};
+module_spi_driver(adau1761_spi_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1361/ADAU1461/ADAU1761/ADAU1961 CODEC SPI driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");