integration time is in seconds; it controls the measurement
time and influences the gain of a sensor
used by adjd_s311, tsl4531
the following drivers have similar controls:
* tsl2563 (integration time is controlled via CALIBSCALE among other things)
* tsl2583 (has integration_time device_attr, but driver doesn't use channels yet)
* tsl2x7x (has integration_time attr)
Signed-off-by: Peter Meerwald <pmeerw@xxxxxxxxxx>
Cc: Jon Brenner <jon.brenner@xxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-iio | 12 ++++++++++++
drivers/iio/industrialio-core.c | 1 +
include/linux/iio/iio.h | 1 +
include/linux/iio/sysfs.h | 15 +++++++++++++++
4 files changed, 29 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 5caaab9..d75147c 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -800,3 +800,15 @@ Description:
Writing '1' stores the current device configuration into
on-chip EEPROM. After power-up or chip reset the device will
automatically load the saved configuration.
+
+What: /sys/.../iio:deviceX/in_intensity_red_integration_time
+What: /sys/.../iio:deviceX/in_intensity_green_integration_time
+What: /sys/.../iio:deviceX/in_intensity_blue_integration_time
+What: /sys/.../iio:deviceX/in_intensity_clear_integration_time
+What: /sys/.../iio:deviceX/in_illuminance_integration_time
+KernelVersion: 3.12
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ This attribute is used to get/set the integration time in
+ seconds.
+
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 97f0297..2cb4841 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -101,6 +101,7 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_PHASE] = "phase",
[IIO_CHAN_INFO_HARDWAREGAIN] = "hardwaregain",
[IIO_CHAN_INFO_HYSTERESIS] = "hysteresis",
+ [IIO_CHAN_INFO_INT_TIME] = "integration_time",
};
const struct iio_chan_spec
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 09ebe0a..45a99ef 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -36,6 +36,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_PHASE,
IIO_CHAN_INFO_HARDWAREGAIN,
IIO_CHAN_INFO_HYSTERESIS,
+ IIO_CHAN_INFO_INT_TIME,
};
enum iio_endian {
diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h
index 2958c96..8a1d186 100644
--- a/include/linux/iio/sysfs.h
+++ b/include/linux/iio/sysfs.h
@@ -100,6 +100,21 @@ struct iio_const_attr {
#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
IIO_CONST_ATTR(sampling_frequency_available, _string)
+/**
+ * IIO_DEV_ATTR_INT_TIME_AVAIL - list available integration times
+ * @_show: output method for the attribute
+ **/
+#define IIO_DEV_ATTR_INT_TIME_AVAIL(_show) \
+ IIO_DEVICE_ATTR(integration_time_available, S_IRUGO, _show, NULL, 0)
+/**
+ * IIO_CONST_ATTR_INT_TIME_AVAIL - list available integration times
+ * @_string: frequency string for the attribute
+ *
+ * Constant version
+ **/
+#define IIO_CONST_ATTR_INT_TIME_AVAIL(_string) \
+ IIO_CONST_ATTR(integration_time_available, _string)
+
#define IIO_DEV_ATTR_TEMP_RAW(_show) \
IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0)
--
1.8.3.4
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