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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
2021-08-09 16:08:17 +02:00
parent 96e5888110
commit a2d950044d
8 changed files with 243 additions and 0 deletions
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libfprint/drivers/elanmoc/elanmoc.c
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@@ -1121,6 +1121,7 @@ fpi_device_elanmoc_class_init (FpiDeviceElanmocClass *klass)
dev_class->scan_type = FP_SCAN_TYPE_PRESS;
dev_class->id_table = id_table;
dev_class->nr_enroll_stages = ELAN_MOC_ENROLL_TIMES;
dev_class->temp_hot_seconds = -1;
dev_class->open = elanmoc_open;
dev_class->close = elanmoc_close;