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path: root/drivers/mfd/wm831x-i2c.c
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Diffstat (limited to 'drivers/mfd/wm831x-i2c.c')
-rw-r--r--drivers/mfd/wm831x-i2c.c76
1 files changed, 20 insertions, 56 deletions
diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c
index a06cbc739716..ac8da1d439da 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);
}
@@ -109,6 +65,13 @@ static int wm831x_i2c_suspend(struct device *dev)
return wm831x_device_suspend(wm831x);
}
+static void wm831x_i2c_shutdown(struct i2c_client *i2c)
+{
+ struct wm831x *wm831x = i2c_get_clientdata(i2c);
+
+ wm831x_device_shutdown(wm831x);
+}
+
static const struct i2c_device_id wm831x_i2c_id[] = {
{ "wm8310", WM8310 },
{ "wm8311", WM8311 },
@@ -133,6 +96,7 @@ static struct i2c_driver wm831x_i2c_driver = {
},
.probe = wm831x_i2c_probe,
.remove = wm831x_i2c_remove,
+ .shutdown = wm831x_i2c_shutdown,
.id_table = wm831x_i2c_id,
};