Hi,

this adds the support for the TouchNetix aXiom touchcontroller family.

The following features are added:
 - I2C communication
 - Input event handling
 - Touchcontroller firmware (AXFW) updates
 - Touchcontroller config (TH2CFGBIN) updates
 - Poll or IRQ support

Many thanks for Dmitry's input on my v5. I included all changes
requested from him.

Regards,
  Marco

Changes in v7:
- Link to v6: https://lore.kernel.org/all/20260303-v6-10-topic-touchscreen-axiom-v6-0-8ac755add12b@pengutronix.de/ (local)
- Rebased on top of 7.2-rc1
- Fix U33 rev.6 usage (Mamta)
- Fix bootloader mode handling, required to disable the IRQ (Andrew)
- Fix bug in usage table population which led to a nullptr bug (Andrew)

Changes in v6:
- Link to v5: https://lore.kernel.org/r/20260111-v6-10-topic-touchscreen-axiom-v5-0-f94e0ae266cb@pengutronix.de (local)
- Fix update POLL mode
- Fix max. input values
- Resolve some "TODO" and "Downstream" comments (Andrew)
- Add 0d, xl fw_variant (Andrew)
- Use 2sec timeout for u02 swreset (Andrew)
- Fix IRQ-runmode input-device registration after FW update
- Drop legacy ALC firmware support, since no fw sanity check could be performed
  which is bad for user experience if they provided the wrong file accidentally.
- drop BLP_PRE_MODE
- make AXIOM_U31 rev.1 required
- axiom_usage_supported: drop iter and instead use new usage_table_by_baseaddr
- axiom_axfw_fw_write: drop goto error handling
- adapt comments
- rework axiom_i2c_probe (Dmitry)
- rework axiom_power_*_device and axiom_parse_firmware (Dmitry)
- rework axiom_register_input_dev (Dmitry)
- rework axiom_register_fwl (Dmitry)
- rework axiom_cfg_fw_cancel (Dmitry)
- rework axiom_cfg_fw_write (Dmitry)
- rework axiom_verify_volatile_mem (Dmitry)
- rework axiom_write_cfg_chunk (Dmitry)
- rework axiom_cfg_fw_prepare (Dmitry)
- rework axiom_axfw_fw_* functions (Dmitry)
- rework axiom_blp_reset (Dmitry)
- rework axiom_blp_write_chunk (Dmitry)
- rework axiom_enter_bootloader_mode (Dmitry)
- rework axiom_axfw_fw_prepare (Dmitry)
- rework regmap_read/write (Dmitry)
- rework axiom_u34_rev1_process_report (Dmitry)
- rework axiom_cdu_wait_idle (Dmitry)
- rework axiom_u64_cds_enabled (Dmitry)
- rework axiom_u42_get_touchslots (Dmitry)
- rework axiom_u33_read (s/ret/error/) (Dmitry)
- rework axiom_u31_device_discover (Dmitry)
- simple s/ret/error/ (Dmitry)
- rework u04 handling (Dmitry)
- rework u02 handling (Dmitry)
- align function name accordingly (Dmitry)
- fix indentation (Dmitry)

Changes in v5:
- Link to v4: https://lore.kernel.org/r/20260106-v6-10-topic-touchscreen-axiom-v4-0-9e9b69c84926@pengutronix.de (local)
- fix sysfs documentation description indentation and date

Changes in v4:
- Link to v3: https://lore.kernel.org/r/20250821-v6-10-topic-touchscreen-axiom-v3-0-940ccee6dba3@pengutronix.de (local)
- rebased on top of v6.19-rc1
- collect r-b tags

Changes in v3:
- Link to v2: https://lore.kernel.org/r/20250529-v6-10-topic-touchscreen-axiom-v2-0-a5edb105a600@pengutronix.de (local)
- firmware: fix commit message (Russ)
- dt-bindings: Add ack from Krzysztof
- dt-bindings: make use of GPIO_ACTIVE_LOW (Krzysztof)
- dt-bindings: drop 'panel: true' property (Krzysztof)
- driver: make use of sysfs_emit (Greg)
- driver: s/WARN()/dev_warn()/ to not take down the system (Greg)
- driver: fix build dependency error by adding "depends on DRM || !DRM"
- driver: harmonize usage printing to u%02X

Changes in v2:
- Link to v1: https://lore.kernel.org/r/20241119-v6-10-topic-touchscreen-axiom-v1-0-6124925b9718@pengutronix.de (local)
- Rework the firmware-duplicate handling -> expose the error to the
  userspace
- Drop Krzysztof Kozlowski ACK and RB
- Add panel-follower support
- Add sysfs-driver-input-touchnetix-axiom documentation
- Add support for new firmware 4.8.9
- Add support to handle 2D and 3D firmware

---
Kamel Bouhara (2):
      dt-bindings: vendor-prefixes: Add TouchNetix AS
      dt-bindings: input: Add TouchNetix axiom touchscreen

Marco Felsch (2):
      firmware_loader: expand firmware error codes with up-to-date error
      Input: Add TouchNetix aXiom I2C Touchscreen support

 .../testing/sysfs-driver-input-touchnetix-axiom    |   80 +
 .../input/touchscreen/touchnetix,ax54a.yaml        |   62 +
 .../devicetree/bindings/vendor-prefixes.yaml       |    2 +
 drivers/base/firmware_loader/sysfs_upload.c        |    1 +
 drivers/input/touchscreen/Kconfig                  |   17 +
 drivers/input/touchscreen/Makefile                 |    1 +
 drivers/input/touchscreen/touchnetix_axiom.c       | 3141 ++++++++++++++++++++
 include/linux/firmware.h                           |    2 +
 lib/test_firmware.c                                |    1 +
 9 files changed, 3307 insertions(+)
---
base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
change-id: 20240704-v6-10-topic-touchscreen-axiom-105761e81011

Best regards,
-- 
Marco Felsch [off-list ref]