diff options
| -rw-r--r-- | drivers/staging/iio/Documentation/sysfs-bus-iio-light | 8 | ||||
| -rw-r--r-- | drivers/staging/iio/light/isl29018.c | 35 |
2 files changed, 42 insertions, 1 deletions
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light index 21d27740581..edbf470e4e3 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light @@ -75,3 +75,11 @@ KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: This property gets/sets the sensors ADC analog integration time. + +What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale +KernelVersion: 2.6.37 +Contact: linux-iio@vger.kernel.org +Description: + Hardware or software applied calibration scale factor assumed + to account for attenuation due to industrial design (glass + filters or aperture holes). diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c index fc5712ab126..cc6d71837e1 100644 --- a/drivers/staging/iio/light/isl29018.c +++ b/drivers/staging/iio/light/isl29018.c @@ -56,6 +56,7 @@ struct isl29018_chip { struct i2c_client *client; struct mutex lock; + unsigned int lux_scale; unsigned int range; unsigned int adc_bit; int prox_scheme; @@ -165,7 +166,7 @@ static int isl29018_read_lux(struct i2c_client *client, int *lux) if (lux_data < 0) return lux_data; - *lux = (lux_data * chip->range) >> chip->adc_bit; + *lux = (lux_data * chip->range * chip->lux_scale) >> chip->adc_bit; return 0; } @@ -263,6 +264,34 @@ static ssize_t get_sensor_data(struct device *dev, char *buf, int mode) } /* Sysfs interface */ +/* lux_scale */ +static ssize_t show_lux_scale(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct isl29018_chip *chip = indio_dev->dev_data; + + return sprintf(buf, "%d\n", chip->lux_scale); +} + +static ssize_t store_lux_scale(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct isl29018_chip *chip = indio_dev->dev_data; + unsigned long lval; + + lval = simple_strtoul(buf, NULL, 10); + if (lval == 0) + return -EINVAL; + + mutex_lock(&chip->lock); + chip->lux_scale = lval; + mutex_unlock(&chip->lock); + + return count; +} + /* range */ static ssize_t show_range(struct device *dev, struct device_attribute *attr, char *buf) @@ -411,6 +440,8 @@ static IIO_DEVICE_ATTR(proximity_on_chip_ambient_infrared_supression, show_prox_infrared_supression, store_prox_infrared_supression, 0); static IIO_DEVICE_ATTR(illuminance0_input, S_IRUGO, show_lux, NULL, 0); +static IIO_DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR, + show_lux_scale, store_lux_scale, 0); static IIO_DEVICE_ATTR(intensity_infrared_raw, S_IRUGO, show_ir, NULL, 0); static IIO_DEVICE_ATTR(proximity_raw, S_IRUGO, show_proxim_ir, NULL, 0); @@ -423,6 +454,7 @@ static struct attribute *isl29018_attributes[] = { ISL29018_CONST_ATTR(adc_resolution_available), ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_supression), ISL29018_DEV_ATTR(illuminance0_input), + ISL29018_DEV_ATTR(illuminance0_calibscale), ISL29018_DEV_ATTR(intensity_infrared_raw), ISL29018_DEV_ATTR(proximity_raw), NULL @@ -479,6 +511,7 @@ static int __devinit isl29018_probe(struct i2c_client *client, mutex_init(&chip->lock); + chip->lux_scale = 1; chip->range = 1000; chip->adc_bit = 16; |