[PATCH v2 0/4] Add ff-memless-next and make hid-lg4ff use it

Hi everybody,

this patch series is a result of my work to improve FFB support for memoryless
devices. ff-memless-next is an improvement over the currently available
ff-memless which is well suited for joypads but cannot handle more advanced
devices such as racing wheels properly. As I have explained in one of RFCs
regarding ff-memless-next, the extent of the changes makes implementing
ff-memless-next as a patch to ff-memless unfeasible. As of now there is a total
of 27 drivers using ff-memless (including lg4ff) - a lot of them joypads.
I do not have access to any FFB joypad at the moment so I cannot
implement the functionality required to handle joypads properly - namely FF_RUMBLE
and emulation of FF_PERIODIC through FF_RUMBLE.
The plan is to implement the missing functionality and replace ff-memless completely
in the future. 

Second part of this series ports lg4ff driver over to ff-memless-next.
The immediate benefit of this is support of all periodic effects and ramp effect.

v2 addresses a few issues that have not been noticed at the time v1 was
submitted. Specific fixes are mentioned in the respective patches.

Michal M.

 Michal Malý (4):
  INPUT: Add ff-memless-next module
  HID: Port hid-lg4ff to ff-memless-next
  HID: Add support for periodic effects in hid-lg4ff
  HID: Add support for ramp effect in hid-lg4ff

 Documentation/input/ff-memless-next.txt | 141 ++++++
 drivers/hid/Kconfig                     |   2 +-
 drivers/hid/hid-lg4ff.c                 |  93 ++--
 drivers/input/Kconfig                   |  11 +
 drivers/input/Makefile                  |   1 +
 drivers/input/ff-memless-next.c         | 789 ++++++++++++++++++++++++++++++++
 include/linux/input/ff-memless-next.h   |  32 ++
 7 files changed, 1033 insertions(+), 36 deletions(-)
--
 1.9.0

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