[PATCH v5] add mtk matrix keypad driver for keypad on MTK SoC

[Fengping yu]

Change since v4:
- remove extra space and redundant lines
- remove disable_irq_nosync and enable_irq in irq handler
- put defconfig as a single patch
- unified device properties interface for ACPI and device trees
- fixed other issue according reviewer comments

fengping.yu (3):
  dt-bindings: add matrix keypad documentation
  arm64: configs: defconfig: enable mtk keypad config
  drivers: input: keyboard: add mtk keypad driver

 .../devicetree/bindings/input/mtk-kpd.txt     |  61 +++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/input/keyboard/Kconfig                |   9 +
 drivers/input/keyboard/Makefile               |   1 +
 drivers/input/keyboard/mtk-kpd.c              | 242 ++++++++++++++++++
 5 files changed, 314 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.txt
 create mode 100644 drivers/input/keyboard/mtk-kpd.c

--
2.18.0