Hello Teodora, On 23.01.2015 14:05, Baluta, Teodora wrote: > The fingerprint sensor acts more like a scanner device, so the > closest type is the V4L2_CAP_VIDEO_CAPTURE. However, this is not a > perfect match because the driver only sends an image, once, when > triggered. Would it be a better alternative to define a new > capability type? Or it would be acceptable to simply have a video > device with no frame buffer or frame rate and the user space > application to read from the character device /dev/videoX? Sorry if I jump in here right in the middle of this discussion, but some time ago, I wrote a fingerprint sensor driver for the Siemens ID Mouse (still part of the kernel AFAICT) which acts as a misc device and just creates a character device node that can be used to directly read a PGM file. Maybe this would be a slightly simpler approach than pulling in all the streaming-optimized features of V4L2? Best, Florian -- SENT FROM MY DEC VT50 TERMINAL
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