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-rw-r--r--drivers/i2c/chips/pcf8574.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c
index 4956e9effd7..cfcf6465408 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);
@@ -79,9 +79,7 @@ static struct i2c_driver pcf8574_driver = {
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);