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
