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[PATCH v4 0/4] Cypress PS/2 Trackpad driver

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This driver, submitted on behalf of Cypress Semiconductor Corporation and
additional contributors, provides support for the Cypress PS/2 Trackpad.

This [PATCH v4] version differs from my previous submitted version[2]:

  Patch #1 (cmdbuf to 8 bytes) and #3 (link in driver) are unchanged.

  Patch #2 (main driver) changes, as recommended by Henrik Rydberg,
  Dmitry Torokhov, and Dudley Du:

  - call input_mt_report_finger_count() directly; drop INPUT_MT_POINTER.
  - #ifdef out all the CYTP_RELATIVE_SUPPORT code.
  - convert CYTP_ macros to functions.
  - propagate error return codes.
  - fixed tp_res_y typo.
  - list Dudley Du <dudl@xxxxxxxxxxx> as the primary author of the driver.
  - additional misc cleanups.

  Patch #4 (selectable simulated multitouch instead of SEMI_MT):

  - this is now #ifdef-disabled by default but needed for (older?) userspace
    X/Unity-desktop which does not support the input_mt_report_finger_count
    events (e.g. BTN_TOOL_TRIPLETAP).

Remaining known problems (assistance or advice appreciated):

  - Patch #4 (simulated multitouch) does not work after rmmod/insmod, and
    stops working after suspend/resume.  Restarting X fixes it in both
    cases.  SEMI_MT appears to work normally in any case (per input-events).

  - cypress_reconnect() doesn't actually work after suspend/resume, but
    psmouse re-inits the driver after _reconnect fails.  Per Dudley Du,
    this routine does work when physically disconnecting the device though
    and its harmless regardless, so I am leaving it in pending further

 -Kamal Mostafa <kamal@xxxxxxxxxxxxx>

[0] PATCH v1:
[1] PATCH v2:
[2] PATCH v3:

Dudley Du (2):
  input: Cypress PS/2 Trackpad psmouse driver
  input: Cypress PS/2 Trackpad link into psmouse-base

Kamal Mostafa (2):
  input: increase struct ps2dev cmdbuf[] to 8 bytes
  input: Cypress PS/2 Trackpad simulated multitouch (disabled)

 drivers/input/mouse/Kconfig        |   10 +
 drivers/input/mouse/Makefile       |    1 +
 drivers/input/mouse/cypress_ps2.c  |  853 ++++++++++++++++++++++++++++++++++++
 drivers/input/mouse/cypress_ps2.h  |  231 ++++++++++
 drivers/input/mouse/psmouse-base.c |   32 ++
 drivers/input/mouse/psmouse.h      |    1 +
 include/linux/libps2.h             |    2 +-
 7 files changed, 1129 insertions(+), 1 deletion(-)
 create mode 100644 drivers/input/mouse/cypress_ps2.c
 create mode 100644 drivers/input/mouse/cypress_ps2.h


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