Add dt-bindings, driver and dts additions to support the touchscreen on
Fairphone (Gen. 6).

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Changes in v2:
- dt-bindings: Move additionalProperties down just before the examples
- driver: Fix some memcpy undefined behavior, and various potential
  issues with malformed or malicious touchscreen response data
- Pick up tags
- Link to v1: https://patch.msgid.link/20260911-eswin-eph8621-v1-0-db447ff9e445@fairphone.com

---
Luca Weiss (3):
      dt-bindings: input: touchscreen: document ESWIN EPH8621
      Input: Add driver for ESWIN EPH8621 touchscreen IC
      arm64: dts: qcom: milos-fairphone-fp6: Add touchscreen

 .../bindings/input/touchscreen/eswin,eph8621.yaml  |  79 +++++
 arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts   |  29 +-
 drivers/input/touchscreen/Kconfig                  |  12 +
 drivers/input/touchscreen/Makefile                 |   1 +
 drivers/input/touchscreen/eswin_eph8621.c          | 333 +++++++++++++++++++++
 5 files changed, 453 insertions(+), 1 deletion(-)
---
base-commit: c2cd463d6ee7d55a3ec0719d93c49ff99022d58f
change-id: 20260911-eswin-eph8621-5d3d766e2b0c

Best regards,
--  
Luca Weiss <luca.weiss@fairphone.com>