1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c
index 48b4e22eaffe..cfcf64654080 100644
--- a/drivers/i2c/chips/pcf8574.c
+++ b/drivers/i2c/chips/pcf8574.c
@@ -57,7 +57,7 @@ SENSORS_INSMOD_2(pcf8574, pcf8574a);
 struct pcf8574_data {
         struct i2c_client client;
 
-        u8 read, write;                 /* Register values */
+        u8 write;                       /* Remember last written value */
 };
 
 static int pcf8574_attach_adapter(struct i2c_adapter *adapter);
@@ -76,23 +76,21 @@ static struct i2c_driver pcf8574_driver = {
 };
 
 /* following are the sysfs callback functions */
-static ssize_t show_read(struct device *dev, char *buf)
+static ssize_t show_read(struct device *dev, struct device_attribute *attr, char *buf)
 {
         struct i2c_client *client = to_i2c_client(dev);
-        struct pcf8574_data *data = i2c_get_clientdata(client);
-        data->read = i2c_smbus_read_byte(client); 
-        return sprintf(buf, "%u\n", data->read);
+        return sprintf(buf, "%u\n", i2c_smbus_read_byte(client));
 }
 
 static DEVICE_ATTR(read, S_IRUGO, show_read, NULL);
 
-static ssize_t show_write(struct device *dev, char *buf)
+static ssize_t show_write(struct device *dev, struct device_attribute *attr, char *buf)
 {
         struct pcf8574_data *data = i2c_get_clientdata(to_i2c_client(dev));
         return sprintf(buf, "%u\n", data->write);
 }
 
-static ssize_t set_write(struct device *dev, const char *buf,
+static ssize_t set_write(struct device *dev, struct device_attribute *attr, const char *buf,
                          size_t count)
 {
         struct i2c_client *client = to_i2c_client(dev);