1 files changed, 134 insertions, 0 deletions

diff --git a/drivers/misc/ad525x_dpot-i2c.c b/drivers/misc/ad525x_dpot-i2c.c
new file mode 100644
index 00000000000..374352af797
--- /dev/null
+++ b/drivers/misc/ad525x_dpot-i2c.c
@@ -0,0 +1,134 @@
+/*
+ * Driver for the Analog Devices digital potentiometers (I2C bus)
+ *
+ * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+
+#include "ad525x_dpot.h"
+
+/* ------------------------------------------------------------------------- */
+/* I2C bus functions */
+static int write_d8(void *client, u8 val)
+{
+        return i2c_smbus_write_byte(client, val);
+}
+
+static int write_r8d8(void *client, u8 reg, u8 val)
+{
+        return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+static int write_r8d16(void *client, u8 reg, u16 val)
+{
+        return i2c_smbus_write_word_data(client, reg, val);
+}
+
+static int read_d8(void *client)
+{
+        return i2c_smbus_read_byte(client);
+}
+
+static int read_r8d8(void *client, u8 reg)
+{
+        return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int read_r8d16(void *client, u8 reg)
+{
+        return i2c_smbus_read_word_data(client, reg);
+}
+
+static const struct ad_dpot_bus_ops bops = {
+        .read_d8        = read_d8,
+        .read_r8d8      = read_r8d8,
+        .read_r8d16     = read_r8d16,
+        .write_d8       = write_d8,
+        .write_r8d8     = write_r8d8,
+        .write_r8d16    = write_r8d16,
+};
+
+static int __devinit ad_dpot_i2c_probe(struct i2c_client *client,
+                                      const struct i2c_device_id *id)
+{
+        struct ad_dpot_bus_data bdata = {
+                .client = client,
+                .bops = &bops,
+        };
+
+        struct ad_dpot_id dpot_id = {
+                .name = (char *) &id->name,
+                .devid = id->driver_data,
+        };
+
+        if (!i2c_check_functionality(client->adapter,
+                                     I2C_FUNC_SMBUS_WORD_DATA)) {
+                dev_err(&client->dev, "SMBUS Word Data not Supported\n");
+                return -EIO;
+        }
+
+        return ad_dpot_probe(&client->dev, &bdata, &dpot_id);
+}
+
+static int __devexit ad_dpot_i2c_remove(struct i2c_client *client)
+{
+        return ad_dpot_remove(&client->dev);
+}
+
+static const struct i2c_device_id ad_dpot_id[] = {
+        {"ad5258", AD5258_ID},
+        {"ad5259", AD5259_ID},
+        {"ad5251", AD5251_ID},
+        {"ad5252", AD5252_ID},
+        {"ad5253", AD5253_ID},
+        {"ad5254", AD5254_ID},
+        {"ad5255", AD5255_ID},
+        {"ad5241", AD5241_ID},
+        {"ad5242", AD5242_ID},
+        {"ad5243", AD5243_ID},
+        {"ad5245", AD5245_ID},
+        {"ad5246", AD5246_ID},
+        {"ad5247", AD5247_ID},
+        {"ad5248", AD5248_ID},
+        {"ad5280", AD5280_ID},
+        {"ad5282", AD5282_ID},
+        {"adn2860", ADN2860_ID},
+        {"ad5273", AD5273_ID},
+        {"ad5171", AD5171_ID},
+        {"ad5170", AD5170_ID},
+        {"ad5172", AD5172_ID},
+        {"ad5173", AD5173_ID},
+        {}
+};
+MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
+
+static struct i2c_driver ad_dpot_i2c_driver = {
+        .driver = {
+                .name   = "ad_dpot",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = ad_dpot_i2c_probe,
+        .remove         = __devexit_p(ad_dpot_i2c_remove),
+        .id_table       = ad_dpot_id,
+};
+
+static int __init ad_dpot_i2c_init(void)
+{
+        return i2c_add_driver(&ad_dpot_i2c_driver);
+}
+module_init(ad_dpot_i2c_init);
+
+static void __exit ad_dpot_i2c_exit(void)
+{
+        i2c_del_driver(&ad_dpot_i2c_driver);
+}
+module_exit(ad_dpot_i2c_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("i2c:ad_dpot");