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device: Add simple temperature model for devices

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This temperature model has three states:
 * COLD
 * WARM
 * HOT

Device drivers can define the time it requires for the device to get HOT
and COLD. The underlying model assumes an exponential warming and
cooling process and enforces a cool-off time after the device has
reached the HOT state. This cool down period is however shorter than the
specified time in the driver.
This commit is contained in:
Benjamin Berg
2021-04-21 17:16:03 +02:00
parent 96e5888110
commit a2d950044d
8 changed files with 243 additions and 0 deletions
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libfprint/drivers/goodixmoc/goodix.c
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@@ -1565,6 +1565,7 @@ fpi_device_goodixmoc_class_init (FpiDeviceGoodixMocClass *klass)
dev_class->scan_type = FP_SCAN_TYPE_PRESS;
dev_class->id_table = id_table;
dev_class->nr_enroll_stages = DEFAULT_ENROLL_SAMPLES;
dev_class->temp_hot_seconds = -1;
dev_class->open = gx_fp_init;
dev_class->close = gx_fp_exit;