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    Subject[PATCH 00/12] misc: xilinx sd-fec driver
    Date
    This patchset is adding the full Soft Decision Forward Error
    Correction (SD-FEC) driver implementation, driver DT binding and
    driver documentation.

    Forward Error Correction (FEC) codes such as Low Density Parity
    Check (LDPC) and turbo codes provide a means to control errors in
    data transmissions over unreliable or noisy communication
    channels. The SD-FEC Integrated Block is an optimized block for
    soft-decision decoding of these codes. Fixed turbo codes are
    supported directly, whereas custom and standardized LDPC codes
    are supported through the ability to specify the parity check
    matrix through an AXI4-Lite bus or using the optional programmable
    (PL)-based support logic. For the further information see
    https://www.xilinx.com/support/documentation/ip_documentation/
    sd_fec/v1_1/pg256-sdfec-integrated-block.pdf

    This driver is a platform device driver which supports SDFEC16
    (16nm) IP. SD-FEC driver supports LDPC decoding and encoding and
    Turbo code decoding. LDPC codes can be specified on
    a codeword-by-codeword basis, also a custom LDPC code can be used.

    The SD-FEC driver exposes a char device interface and supports
    file operations: open(), close(), poll() and ioctl(). The driver
    allows only one usage of the device, open() limits the number of
    driver instances. The driver also utilize Common Clock Framework
    (CCF).

    The control and monitoring is supported over ioctl system call.
    The features supported by ioctl():
    - enable or disable data pipes to/from device
    - configure the FEC algorithm parameters
    - set the order of data
    - provide a control of a SDFEC bypass option
    - activates/deactivates SD-FEC
    - collect and provide statistical data
    - enable/disable interrupt mode

    Poll can be utilized to detect errors on IRQ trigger rather than
    using looping status and stats ioctl's.

    Reviewed-by: Michal Simek <michal.simek@xilinx.com>
    Tested-by: Santhosh Dyavanapally <SDYAVANA@xilinx.com>
    Tested by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
    Tested-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
    Tested-by: Derek Kiernan <derek.kiernan@xilinx.com>
    Signed-off-by: Derek Kiernan <derek.kiernan@xilinx.com>
    Signed-off-by: Dragan Cvetic <dragan.cvetic@xilinx.com>

    Dragan Cvetic (12):
    dt-bindings: xilinx-sdfec: Add SDFEC binding
    misc: xilinx-sdfec: add core driver
    misc: xilinx_sdfec: Add CCF support
    misc: xilinx_sdfec: Add open, close and ioctl
    misc: xilinx_sdfec: Store driver config and state
    misc: xilinx_sdfec: Add ability to configure turbo mode
    misc: xilinx_sdfec: Add ability to configure LDPC
    misc: xilinx_sdfec: Add ability to get/set config
    misc: xilinx_sdfec: Support poll file operation
    misc: xilinx_sdfec: Add stats & status ioctls
    Docs: misc: xilinx_sdfec: Add documentation
    MAINTAINERS: add maintainer for SD-FEC support

    .../devicetree/bindings/misc/xlnx,sd-fec.txt | 58 +
    Documentation/misc-devices/index.rst | 1 +
    Documentation/misc-devices/xilinx_sdfec.rst | 286 ++++
    MAINTAINERS | 12 +
    drivers/misc/Kconfig | 12 +
    drivers/misc/Makefile | 1 +
    drivers/misc/xilinx_sdfec.c | 1683 ++++++++++++++++++++
    include/uapi/misc/xilinx_sdfec.h | 470 ++++++
    8 files changed, 2523 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt
    create mode 100644 Documentation/misc-devices/xilinx_sdfec.rst
    create mode 100644 drivers/misc/xilinx_sdfec.c
    create mode 100644 include/uapi/misc/xilinx_sdfec.h

    --
    2.7.4

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