On 04/12/14 13:00, Teodora Baluta wrote: > This patchset adds support for fingerprint sensors through the IIO interface. > This way userspace applications collect information in a uniform way. All > processing would be done in the upper layers as suggested in [0]. > > In order to test out this proposal, a minimal implementation for UPEK's > TouchChip Fingerprint Sensor via USB is also available. Although there is an > existing implementation in userspace for USB fingerprint devices, including this > particular device, the driver represents a proof of concept of how fingerprint > sensors could be integrated in the IIO framework regardless of the used bus. For > lower power requirements, the SPI bus is preferred and a kernel driver > implementation makes more sense. So why not v4l? These are effectively image sensors.. > > A sysfs trigger is enabled and the device starts scanning. As soon as an image > is available it is written in the character device /dev/iio:deviceX. > > Userspace applications will be able to calculate the expected image size using > the fingerprint attributes height, width and bit depth. Other attributes > introduced for the fingerprint channel in IIO represent information that aids in > the fingerprint image processing. Besides these, the proposed interface offers > userspace a way to read a feedback after a scan (like the swipe was too slow or > too fast) through a modified fingerprint_status channel. > > [0] http://www.spinics.net/lists/linux-iio/msg11463.html > > Teodora Baluta (3): > iio: core: add support for fingerprint devices > iio: core: change channel's storagebits/realbits to u32 > iio: fingerprint: add fingerprint sensor via USB > > Documentation/ABI/testing/sysfs-bus-iio | 51 +++ > drivers/iio/Kconfig | 1 + > drivers/iio/Makefile | 1 + > drivers/iio/fingerprint/Kconfig | 15 + > drivers/iio/fingerprint/Makefile | 5 + > drivers/iio/fingerprint/fp_tc.c | 162 +++++++++ > drivers/iio/fingerprint/fp_tc.h | 22 ++ > drivers/iio/fingerprint/fp_tc_usb.c | 618 ++++++++++++++++++++++++++++++++ > drivers/iio/fingerprint/fp_tc_usb.h | 144 ++++++++ > drivers/iio/industrialio-core.c | 9 + > include/linux/iio/iio.h | 11 +- > include/linux/iio/types.h | 10 + > 12 files changed, 1047 insertions(+), 2 deletions(-) > create mode 100644 drivers/iio/fingerprint/Kconfig > create mode 100644 drivers/iio/fingerprint/Makefile > create mode 100644 drivers/iio/fingerprint/fp_tc.c > create mode 100644 drivers/iio/fingerprint/fp_tc.h > create mode 100644 drivers/iio/fingerprint/fp_tc_usb.c > create mode 100644 drivers/iio/fingerprint/fp_tc_usb.h > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
