drivers: mfd: Add support for TI aic325x codec

AIC3033 is register compatible with aic3206 which is strip down
version of aic3256.

This code is from TI

Change-Id: I15b6ac2ae52f5b39e5036a5028cf537c93b66134
Signed-off-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-on: http://git-master/r/210808
GVS: Gerrit_Virtual_Submit
Reviewed-by: Scott Peterson <speterson@nvidia.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/drivers/mfd/tlv320aic3256-i2c.c b/drivers/mfd/tlv320aic3256-i2c.c
new file mode 100644
index 000000000000..6d947494005e
--- /dev/null
+++ b/drivers/mfd/tlv320aic3256-i2c.c
@@ -0,0 +1,112 @@
+/*
+ * tlv320aic325x-i2c.c  -- driver for TLV320AIC3XXX
+ *
+ * Author:	Mukund Navada <navada@ti.com>
+ *		Mehar Bajwa <mehar.bajwa@ti.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/tlv320aic325x-core.h>
+
+struct regmap_config aic325x_i2c_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.cache_type = REGCACHE_NONE,
+};
+
+static __devinit int aic325x_i2c_probe(struct i2c_client *i2c,
+					  const struct i2c_device_id *id)
+{
+	struct aic325x *aic325x;
+	const struct regmap_config *regmap_config;
+	int ret;
+
+	switch (id->driver_data) {
+#ifdef CONFIG_AIC3262_CORE
+	case TLV320AIC3262:
+		regmap_config = &aic325x_i2c_regmap;
+		break;
+#endif
+	case TLV320AIC3256:
+		regmap_config = &aic325x_i2c_regmap;
+		break;
+
+	default:
+		dev_err(&i2c->dev, "Unknown device type %ld\n",
+			id->driver_data);
+		return -EINVAL;
+	}
+
+	aic325x = devm_kzalloc(&i2c->dev, sizeof(*aic325x), GFP_KERNEL);
+	if (aic325x == NULL)
+		return -ENOMEM;
+
+	aic325x->regmap = devm_regmap_init_i2c(i2c, regmap_config);
+
+	if (IS_ERR(aic325x->regmap)) {
+		ret = PTR_ERR(aic325x->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	aic325x->type = id->driver_data;
+	aic325x->dev = &i2c->dev;
+	aic325x->irq = i2c->irq;
+
+	return aic325x_device_init(aic325x);
+}
+
+static int __devexit aic325x_i2c_remove(struct i2c_client *i2c)
+{
+	struct aic325x *aic325x = dev_get_drvdata(&i2c->dev);
+
+	aic325x_device_exit(aic325x);
+	return 0;
+}
+
+static const struct i2c_device_id aic325x_i2c_id[] = {
+	{"tlv320aic3262", TLV320AIC3262},
+	{"tlv320aic325x", TLV320AIC3256},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, aic325x_i2c_id);
+
+static struct i2c_driver aic325x_i2c_driver = {
+	.driver = {
+		.name	= "tlv320aic325x",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= aic325x_i2c_probe,
+	.remove		= __devexit_p(aic325x_i2c_remove),
+	.id_table	= aic325x_i2c_id,
+};
+
+module_i2c_driver(aic325x_i2c_driver);
+
+MODULE_DESCRIPTION("TLV320AIC3XXX I2C bus interface");
+MODULE_AUTHOR("Mukund Navada <navada@ti.com>");
+MODULE_LICENSE("GPL");