diff options
Diffstat (limited to 'drivers/i2c/chips/pcf8574.c')
| -rw-r--r-- | drivers/i2c/chips/pcf8574.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c index 48b4e22eaff..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); @@ -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); |