1 files changed, 12 insertions, 56 deletions

diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c
index a06cbc73971..3ec6085d5fc 100644
--- a/drivers/mfd/wm831x-i2c.c
+++ b/drivers/mfd/wm831x-i2c.c
@@ -18,67 +18,17 @@
 #include <linux/delay.h>
 #include <linux/mfd/core.h>
 #include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
 
 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/pdata.h>
 
-static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
-				  int bytes, void *dest)
-{
-	struct i2c_client *i2c = wm831x->control_data;
-	int ret;
-	u16 r = cpu_to_be16(reg);
-
-	ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
-	if (ret < 0)
-		return ret;
-	if (ret != 2)
-		return -EIO;
-
-	ret = i2c_master_recv(i2c, dest, bytes);
-	if (ret < 0)
-		return ret;
-	if (ret != bytes)
-		return -EIO;
-	return 0;
-}
-
-/* Currently we allocate the write buffer on the stack; this is OK for
- * small writes - if we need to do large writes this will need to be
- * revised.
- */
-static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
-				   int bytes, void *src)
-{
-	struct i2c_client *i2c = wm831x->control_data;
-	struct i2c_msg xfer[2];
-	int ret;
-
-	reg = cpu_to_be16(reg);
-
-	xfer[0].addr = i2c->addr;
-	xfer[0].flags = 0;
-	xfer[0].len = 2;
-	xfer[0].buf = (char *)&reg;
-
-	xfer[1].addr = i2c->addr;
-	xfer[1].flags = I2C_M_NOSTART;
-	xfer[1].len = bytes;
-	xfer[1].buf = (char *)src;
-
-	ret = i2c_transfer(i2c->adapter, xfer, 2);
-	if (ret < 0)
-		return ret;
-	if (ret != 2)
-		return -EIO;
-
-	return 0;
-}
-
 static int wm831x_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct wm831x *wm831x;
+	int ret;
 
 	wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
 	if (wm831x == NULL)
@@ -86,9 +36,15 @@ static int wm831x_i2c_probe(struct i2c_client *i2c,
 
 	i2c_set_clientdata(i2c, wm831x);
 	wm831x->dev = &i2c->dev;
-	wm831x->control_data = i2c;
-	wm831x->read_dev = wm831x_i2c_read_device;
-	wm831x->write_dev = wm831x_i2c_write_device;
+
+	wm831x->regmap = regmap_init_i2c(i2c, &wm831x_regmap_config);
+	if (IS_ERR(wm831x->regmap)) {
+		ret = PTR_ERR(wm831x->regmap);
+		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
+			ret);
+		kfree(wm831x);
+		return ret;
+	}
 
 	return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
 }