[PATCH v6] Add mtk matrix keypad driver for keypad on MTK SoC

[Fengping Yu]

Change since v5:
- remove unnecessary include files
- remove redundant comments and newlines
- use local irqnr variable instead of member variable of mtk_keypad struct
- use regmap to read and write registers
- drop kpd_get_dts_info directly into probe function
- use devm_add_action_or_reset to avoid goto error handling when do clk setting
- use devm_request_threaded_irq api to request irq
- remove platform_set_drvdata

fengping.yu (3):
  dt-bindings: Change keypad documentation schema
  drivers: input: keyboard: Add mtk keypad driver
  configs: defconfig: Add CONFIG_KEYBOARD_MTK_KPD=y

 .../devicetree/bindings/input/mtk-kpd.txt     |  61 -------
 .../devicetree/bindings/input/mtk-kpd.yaml    |  93 +++++++++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/input/keyboard/Kconfig                |   5 +-
 drivers/input/keyboard/mtk-kpd.c              | 151 ++++++++----------
 5 files changed, 163 insertions(+), 148 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.txt
 create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.yaml

--
2.18.0