Re: [PATCH v5 3/3] iio: light: Add support for APDS9306 Light Sensor

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Hi Jonathan,

+
+static struct iio_event_spec apds9306_event_spec_als[] = {
+    {
+        .type = IIO_EV_TYPE_THRESH,
+        .dir = IIO_EV_DIR_RISING,
+        .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE),
+    }, {
+        .type = IIO_EV_TYPE_THRESH,
+        .dir = IIO_EV_DIR_FALLING,
+        .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE),
+    }, {
+        .type = IIO_EV_TYPE_THRESH,
+        .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD),
+    }, {
+        .type = IIO_EV_TYPE_THRESH_ADAPTIVE,
+        .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE) |
+            BIT(IIO_EV_INFO_ENABLE),
+    }, {
+        .mask_separate = BIT(IIO_EV_INFO_ENABLE),

What's the intent of this final entry?
The type will default to IIO_EV_TYPE_THRESH anyway but if that
the intent you should specify it.   There isn't an 'obvious'
default for type in the same way there sort of is for dir
(as it's either direction).
Understood, let me experiment and see the ABI difference, if any and get back to you.

This device has two channels - ALS and CLEAR. One interrupt enable option and
one Channel selection option (Clear or ALS). According to our previous discussions:
https://lore.kernel.org/all/20230415183543.6d5e3392@jic23-huawei/
the event_spec was updated to have two interrupt enable attributes - one for CLEAR and
one for ALS. (Intensity channel and Illuminance channel)

If I remove the final entry I am getting only one enable option (intensity channel):
/sys/bus/iio/devices/iio:device0/
|-- events
|   |-- in_intensity_clear_thresh_either_en
|   |-- thresh_adaptive_either_en
|   |-- thresh_adaptive_either_value
|   |-- thresh_adaptive_either_values_available
|   |-- thresh_either_period
|   |-- thresh_either_period_available
|   |-- thresh_falling_value
|   `-- thresh_rising_value

The last entry gives be the following event attributes, enable attributes for both
intensity and illuminance channels:
/sys/bus/iio/devices/iio:device0/
|-- events
|   |-- in_illuminance_thresh_either_en
|   |-- in_intensity_clear_thresh_either_en
|   |-- thresh_adaptive_either_en
|   |-- thresh_adaptive_either_value
|   |-- thresh_adaptive_either_values_available
|   |-- thresh_either_period
|   |-- thresh_either_period_available
|   |-- thresh_falling_value
|   `-- thresh_rising_value

Please let me know if this sounds ok to you.

Regards,
Subhajit Ghosh




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