samsung update 1

1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/mfd/max8698.c b/drivers/mfd/max8698.c
new file mode 100644
index 0000000..9dd6004
--- /dev/null
+++ b/drivers/mfd/max8698.c
@@ -0,0 +1,161 @@
+/*
+ * max8698.c - mfd core driver for the Maxim 8698
+ *
+ *  Copyright (C) 2009-2010 Samsung Electronics
+ *  Kyungmin Park <kyungmin.park@samsung.com>
+ *  Marek Szyprowski <m.szyprowski@samsung.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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  2010.10.26
+ *  Modified by Taekki Kim <taekki.kim@samsung.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8698.h>
+#include <linux/mfd/max8698-private.h>
+
+static struct mfd_cell max8698_devs[] = {
+	{
+		.name = "max8698-pmic",
+	}
+};
+
+static int max8698_i2c_device_read(struct max8698_dev *max8698, u8 reg, u8 *dest)
+{
+	struct i2c_client *client = max8698->i2c_client;
+	int ret;
+
+	mutex_lock(&max8698->iolock);
+	ret = i2c_smbus_read_byte_data(client, reg);
+	mutex_unlock(&max8698->iolock);
+	if (ret < 0)
+		return ret;
+
+	ret &= 0xff;
+	*dest = ret;
+	return 0;
+}
+
+static int max8698_i2c_device_write(struct max8698_dev *max8698, u8 reg, u8 value)
+{
+	struct i2c_client *client = max8698->i2c_client;
+	int ret;
+
+	mutex_lock(&max8698->iolock);
+	ret = i2c_smbus_write_byte_data(client, reg, value);
+	mutex_unlock(&max8698->iolock);
+	return ret;
+}
+
+static int max8698_i2c_device_update(struct max8698_dev *max8698, u8 reg,
+				     u8 val, u8 mask)
+{
+	struct i2c_client *client = max8698->i2c_client;
+	int ret;
+
+	mutex_lock(&max8698->iolock);
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret >= 0) {
+		u8 old_val = ret & 0xff;
+		u8 new_val = (val & mask) | (old_val & (~mask));
+		ret = i2c_smbus_write_byte_data(client, reg, new_val);
+		if (ret >= 0)
+			ret = 0;
+	}
+	mutex_unlock(&max8698->iolock);
+	return ret;
+}
+
+static int max8698_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct max8698_dev *max8698;
+	int ret = 0;
+
+	max8698 = kzalloc(sizeof(struct max8698_dev), GFP_KERNEL);
+	if (max8698 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max8698);
+	max8698->dev = &i2c->dev;
+	max8698->i2c_client = i2c;
+	max8698->dev_read = max8698_i2c_device_read;
+	max8698->dev_write = max8698_i2c_device_write;
+	max8698->dev_update = max8698_i2c_device_update;
+	mutex_init(&max8698->iolock);
+
+	ret = mfd_add_devices(max8698->dev, -1,
+			      max8698_devs, ARRAY_SIZE(max8698_devs),
+			      NULL, 0);
+	if (ret < 0)
+		goto err;
+
+	return ret;
+
+err:
+	mfd_remove_devices(max8698->dev);
+	kfree(max8698);
+	return ret;
+}
+
+static int max8698_i2c_remove(struct i2c_client *i2c)
+{
+	struct max8698_dev *max8698 = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(max8698->dev);
+	kfree(max8698);
+
+	return 0;
+}
+
+static const struct i2c_device_id max8698_i2c_id[] = {
+       { "max8698", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, max8698_i2c_id);
+
+static struct i2c_driver max8698_i2c_driver = {
+	.driver = {
+		   .name = "max8698",
+		   .owner = THIS_MODULE,
+	},
+	.probe = max8698_i2c_probe,
+	.remove = max8698_i2c_remove,
+	.id_table = max8698_i2c_id,
+};
+
+static int __init max8698_i2c_init(void)
+{
+	return i2c_add_driver(&max8698_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max8698_i2c_init);
+
+static void __exit max8698_i2c_exit(void)
+{
+	i2c_del_driver(&max8698_i2c_driver);
+}
+module_exit(max8698_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 8698 multi-function core driver");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_LICENSE("GPL");