static ssize_t lightsensor_lux_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned int result;
struct bh1721_data *bh1721 = dev_get_drvdata(dev);
/*
* POWER ON command is possible to omit.
*/
if (!(bh1721->power_state & LIGHT_ENABLED)){
if((bh1721_write_command(bh1721->i2c_client, &POWER_ON))>0)
light_enable = ON;
bh1721_write_command(bh1721->i2c_client, &AUTO_RESOLUTION_1);
/* Maximum measurement time */
msleep(180);
}
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
if ( !(bh1721->power_state & LIGHT_ENABLED) ){
if((bh1721_write_command(bh1721->i2c_client, &POWER_DOWN))>0)
light_enable = OFF;
}
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
result = (result * 10) / 12;
result = result * 139 / 13;
return sprintf(buf, "%d\n", result);
}
/*For Factory Test Mode*/
static ssize_t lightsensor_file_state_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct bh1721_data *bh1721 = dev_get_drvdata(dev);
unsigned int result;
/*
* POWER ON command is possible to omit.
*/
printk("[%s] lightsensor_file_state_show \n", __func__);
bh1721_write_command(bh1721->i2c_client, &POWER_ON);
bh1721_write_command(bh1721->i2c_client, &H_RESOLUTION_2);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
bh1721_write_command(bh1721->i2c_client, &POWER_DOWN);
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
result = (result*10)/12;
/* apply hysteresis */
printk("[%s] original lux = %u\n", __func__, result);
result = get_next_level(result);
printk("[%s] representative lux = %u\n", __func__, result);
return sprintf(buf, "%d\n", result);
}
static unsigned int lightsensor_get_adcvalue(struct bh1721_data *bh1721)
{
unsigned int result;
bh1721_write_command(bh1721->i2c_client, &H_RESOLUTION_2);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
result = (result*10)/12;
result = get_next_level(result);
return result;
}
/*For Factory Test Mode*/
static ssize_t lightsensor_file_state_show(struct device *dev, struct device_attribute *attr, char *buf)
{
unsigned int result;
/*
* POWER ON command is possible to omit.
*/
if((bh1721_write_command(chip->client, &POWER_ON))>0)
light_enable = ON;
bh1721_write_command(chip->client, &H_RESOLUTION_2);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(chip->client, chip->illuminance_data);
if((bh1721_write_command(chip->client, &POWER_DOWN))>0)
light_enable = OFF;
result = chip->illuminance_data[0] << 8 | chip->illuminance_data[1];
result = (result*10)/12;
return sprintf(buf, "%d\n", result);
}
/*For Factory Test Mode*/
static ssize_t bh1721_show_illuminance(struct device *dev, struct device_attribute *attr, char *buf)
{
struct bh1721_data *bh1721 = dev_get_drvdata(dev);
unsigned int result;
/*
* POWER ON command is possible to omit.
*/
if((bh1721_write_command(bh1721->i2c_client, &POWER_ON))>0)
light_enable = ON;
bh1721_write_command(bh1721->i2c_client, &AUTO_RESOLUTION_1);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
if((bh1721_write_command(bh1721->i2c_client, &POWER_DOWN))>0)
light_enable = OFF;
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
return sprintf(buf, "%d\n", result);
}