static ssize_t als_lux0_input_data_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct als_data *data = i2c_get_clientdata(client);
int ret_val;
int temp;
/* Protect against parallel reads */
pm_runtime_get_sync(dev);
mutex_lock(&data->mutex);
/* clear EOC interrupt status */
i2c_smbus_write_byte(client, 0x40);
/* start measurement */
temp = i2c_smbus_read_byte_data(client, 0x81);
i2c_smbus_write_byte_data(client, 0x81, temp | 0x08);
ret_val = als_wait_for_data_ready(dev);
if (ret_val < 0)
goto failed;
temp = i2c_smbus_read_byte_data(client, 0x8C); /* LSB data */
if (temp < 0) {
ret_val = temp;
goto failed;
}
ret_val = i2c_smbus_read_byte_data(client, 0x8D); /* MSB data */
if (ret_val < 0)
goto failed;
mutex_unlock(&data->mutex);
pm_runtime_put_sync(dev);
temp = (ret_val << 8) | temp;
return sprintf(buf, "%d\n", temp);
failed:
mutex_unlock(&data->mutex);
pm_runtime_put_sync(dev);
return ret_val;
}
static int als_set_default_config(struct i2c_client *client)
{
int ret_val;
/* Write the command and then switch on */
ret_val = i2c_smbus_write_byte_data(client, 0x80, 0x01);
if (ret_val < 0) {
dev_err(&client->dev, "failed default switch on write\n");
return ret_val;
}
/* detection range: 1~64K Lux, maunal measurement */
ret_val = i2c_smbus_write_byte_data(client, 0x81, 0x08);
if (ret_val < 0)
dev_err(&client->dev, "failed default LUX on write\n");
/* We always get 0 for the 1st measurement after system power on,
* so make sure it is finished before user asks for data.
*/
als_wait_for_data_ready(&client->dev);
return ret_val;
}
static int als_set_default_config(struct i2c_client *client)
{
int ret_val;
/* */
ret_val = i2c_smbus_write_byte_data(client, 0x80, 0x01);
if (ret_val < 0) {
dev_err(&client->dev, "failed default switch on write\n");
return ret_val;
}
/* */
ret_val = i2c_smbus_write_byte_data(client, 0x81, 0x08);
if (ret_val < 0)
dev_err(&client->dev, "failed default LUX on write\n");
/*
*/
als_wait_for_data_ready(&client->dev);
return ret_val;
}
