[PATCH 0/7] Input: edt-ft5x06 - add SPI transport and FocalTech FT8722 support

[Luka Panio <lukapanio@gmail.com>]

The FocalTech FT8722 is a touch and display driver (TDDI) found in the
Nexphone (QCM6490). Its touch controller speaks the usual FocalTech
register protocol handled by edt-ft5x06, but it is connected over SPI,
has no flash and runs its firmware from RAM, and shares its power and
reset with the display panel.

This series:

 - splits the bus independent core of edt-ft5x06 from the I2C driver
   (patch 1) and moves the controller bring-up into a helper (patch 2),
 - adds an optional per-chip boot hook, used to download the firmware
   after every reset (patch 3), and a per-chip touch data register
   (patch 4),
 - documents the FT8722 touch controller as focaltech,ft8722-ts, keeping
   it distinct from the display side of the chip (patch 5),
 - adds an SPI transport with the FT8722 firmware loader (patch 6),
 - lets the driver follow a DRM panel, like i2c-hid does, so the touch
   controller is powered down and re-initialised together with the panel
   (patch 7).

Tested on the Nexphone by Nex Computers. A board DTS using it will
follow separately.

Luka Panio (7):
  Input: edt-ft5x06 - split the bus independent core from the I2C driver
  Input: edt-ft5x06 - move the controller bring-up into a helper
  Input: edt-ft5x06 - add an optional controller boot hook
  Input: edt-ft5x06 - allow a chip specific touch data register
  dt-bindings: input: touchscreen: edt-ft5x06: Add FocalTech FT8722
  Input: edt-ft5x06 - add SPI transport and FT8722 support
  Input: edt-ft5x06 - support following a DRM panel

 .../input/touchscreen/edt-ft5x06.yaml         |  37 ++
 drivers/input/touchscreen/Kconfig             |  15 +
 drivers/input/touchscreen/Makefile            |   1 +
 drivers/input/touchscreen/edt-ft5x06-spi.c    | 475 ++++++++++++++
 drivers/input/touchscreen/edt-ft5x06.c        | 585 ++++++++++++------
 drivers/input/touchscreen/edt-ft5x06.h        |  33 +
 6 files changed, 957 insertions(+), 189 deletions(-)
 create mode 100644 drivers/input/touchscreen/edt-ft5x06-spi.c
 create mode 100644 drivers/input/touchscreen/edt-ft5x06.h


base-commit: d419d682257d813f6cb7a28e42b35d0edf4ad038
-- 
2.55.0