[PATCH v2 0/7] Input: mt6779-keypad - double keys support

[Mattijs Korpershoek]

The MediaTek keypad controller has multiple operating modes:
* single key detection (currently implemented)
* double key detection

With double key detection, each (row,column) is a group that can detect
two keys in the key matrix.
This minimizes the overall pin counts for cost reduction.
However, pressing multiple keys in the same group will not be
detected properly.

On some boards, like mt8183-pumpkin, double key detection is used.

Signed-off-by: Mattijs Korpershoek <mkorpershoek at baylibre.com>

---
Changes in v2:
- bindings: add matrix-keymap justification in commit message (Krzysztof)
- bindings: switch from double-keys(boolean) to keys-per-group(uint32) (Krzysztof)
- driver: add a function pointer for row/column calculation (Angelo)
- Link to v1: https://lore.kernel.org/r/20220720-mt8183-keypad-v1-0-ef9fc29dbff4@baylibre.com

---
Fabien Parent (2):
      arm64: dts: mediatek: mt8183: add keyboard node
      arm64: dts: mediatek: mt8183-pumpkin: add keypad support

Mattijs Korpershoek (5):
      MAINTAINERS: input: add mattijs for mt6779-keypad
      dt-bindings: mediatek,mt6779-keypad: use unevaluatedProperties
      dt-bindings: mediatek,mt6779-keypad: add mediatek,keys-per-group
      Input: mt6779-keypad - prepare double keys support with calc_row_col
      Input: mt6779-keypad - support double keys matrix

 .../bindings/input/mediatek,mt6779-keypad.yaml     |  8 ++++-
 MAINTAINERS                                        |  6 ++++
 arch/arm64/boot/dts/mediatek/mt8183-pumpkin.dts    | 21 +++++++++++
 arch/arm64/boot/dts/mediatek/mt8183.dtsi           |  9 +++++
 drivers/input/keyboard/mt6779-keypad.c             | 41 ++++++++++++++++++++--
 5 files changed, 82 insertions(+), 3 deletions(-)
---
base-commit: 668af1b6548837b44a2bfe65dcbae6b250adbf63
change-id: 20220720-mt8183-keypad-20aa77106ff0

Best regards,
-- 
Mattijs Korpershoek <mkorpershoek at baylibre.com>