[v15,0/3] Input: Add TouchNetix axiom touchscreen driver

Message

Kamel Bouhara June 27, 2024, 6:54 a.m. UTC

Add a new driver for the TouchNetix's axiom family of touchscreen
controller. This driver only support i2c and can be later adapted for
SPI and USB support.
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Changes in v15:
 - Fix report ABS_MT_TRACKING_ID after input_mt_slot

Changes in v14:
 - Fix is_report/present as booleans
 - Add a comment to describe the boolean variable insert
 - Remove not needed packed attributed from struct axiom_cmd_header
 - Remove duplicate target event checking
 - Only emit ABS_MT_DISTANCE/ABS_MT_PRESSURE
 - Remove input_report_key() as a mean to indicate firs reported contact
 - Remove EV_REL only need for u46 aka debug data
 - Report only MT_TOOL_FINGER instead of MT_TOOL_MAX
 - Remove unused EV_REL
 - Remove emit BTN_TOUCH as a way to indicate first target report
 - Remove unjustified delay after read access
 - Remove falling back to polling mode when no irq acquired in ACPI/DT
 - Remove handle of u46 report as it's not used
 - Remove touchscreen_report_pos() call as it generates extra dummy events
 - Rebase on v6.10-rc5

Changes in v13:
 - Fix CRC16 not selected reported in:https://lore.kernel.org/oe-kbuild-all/[e-mail]/
 - Rebase on v6.10-rc2

Changes in v12:
 - Fix REGMAP_I2C not selected
 - Rebase on v6.10-rc1

Changes in v11:
 - Fix regulators name to match dt-binding
 - Enable regulators before reset is asserted

Changes in v10:
 - Set regulators as required
 - Enable power supply before reset
 - Fix ref count due to regulator requested twice
 - Rebase on v6.9-rc4

Changes in v9:
 - Fix issue reported in https://lore.kernel.org/oe-kbuild-all/[e-mail]/
 - Rebase on v6.8-rc2

Changes in v8:
 - Fix missing call to input_report_slot_state()
 - Fix issue reported in https://lore.kernel.org/oe-kbuild-all/[e-mail]/

Changes in v7:
 - Remove startup time from dt-binding
 - Fix usage table not correctly populated

Changes in v6:
 - Fix missing unevaluatedProperties.in dt-binding
 - Use __le16 to correctly deal with device endianness
 - Use standart kernel types s/char/u8/
 - Use regmap api as driver might support spi later
 - Use get_unaligned_le16() for the sake of clarity
 - Use devm_regulator_enable_optional()

Changes in v5:
 - Fix wrong message constructed in axiom_i2c_read
 - Delay required between i2c reads is >= 250us
 - Do not split report reading in two phases as we'll
   have to wait 500us
 - Use lower-case in properties names
 - Make regulators properties are required in dt-binding
 - Fix bug report: https://lore.kernel.org/lkml/[e-mail]/
 - Fix bug report: https://lore.kernel.org/lkml/[e-mail]/

Changes in v4:
 - Cleanup unused headers and macros
 - Use standard kernel type
 - Namespace structures and functions
 - Use packed struct when possible to avoid bitfield operators
 - Fix missing break when address is found in axiom_populate_target_address()
 - Split reads in two steps for the reports, first length then report
   itself so we only read required bytes
 - Get poll-interval from devicetree
 - Add VDDI/VDDA regulators
 - Add a startup delay of 110 ms required after VDDA/VDDI is applied
 - Remove axiom_i2c_write() as it is no more used

Changes in v3:
 - Remove irq-gpios property in dt-binding
 - Use a generic node name
 - Fix issues reported in https://lore.kernel.org/oe-kbuild-all/[e-mail]/

Changes in v2:
 - Add device tree binding documentation
 - Move core functions in axiom_i2c as we only care about i2c support now
 - Use static function when required
 - Use syntax dev_err_probe()
 - Add an hardware based reset

Kamel Bouhara (3):
  dt-bindings: vendor-prefixes: Add TouchNetix AS
  dt-bindings: input: Add TouchNetix axiom touchscreen
  Input: Add TouchNetix axiom i2c touchscreen driver

 .../input/touchscreen/touchnetix,ax54a.yaml   |  62 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   8 +
 drivers/input/touchscreen/Kconfig             |  14 +
 drivers/input/touchscreen/Makefile            |   1 +
 drivers/input/touchscreen/touchnetix_axiom.c  | 616 ++++++++++++++++++
 6 files changed, 703 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/touchnetix,ax54a.yaml
 create mode 100644 drivers/input/touchscreen/touchnetix_axiom.c

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2.25.1