[PATCH v5 0/4] gpio: realtek: Add support for Realtek DHC RTD1625

[Yu-Chun Lin <eleanor.lin@realtek.com>]

This series adds GPIO support for the Realtek DHC RTD1625 SoC.

Unlike the existing driver (gpio-rtd.c) which uses shared bank registers,
the RTD1625 features a per-pin register architecture where each GPIO line
is managed by its own dedicated 32-bit control register. This distinct
hardware design requires a new, separate driver.

Best Regards,
Yu-Chun Lin
---
Changes in v5:

Patch 3 (driver):
- Add comment for @base_offset.
- Rename the local 'gpio_irq_chip' pointer to 'girq' to match common
GPIO IRQ naming.
- Drop the intermediate variable.

v4: https://lore.kernel.org/lkml/20260622092335.1166876-1-eleanor.lin@realtek.com/
v3: https://lore.kernel.org/lkml/20260512033317.1602537-1-eleanor.lin@realtek.com/
v2: https://lore.kernel.org/lkml/20260408025243.1155482-1-eleanor.lin@realtek.com/
v1: https://lore.kernel.org/lkml/20260331113835.3510341-1-eleanor.lin@realtek.com/

Tzuyi Chang (2):
  dt-bindings: gpio: realtek: Add realtek,rtd1625-gpio
  gpio: realtek: Add driver for Realtek DHC RTD1625 SoC

Yu-Chun Lin (2):
  gpio: Replace "default y" with "default ARCH_REALTEK" in Kconfig
  arm64: dts: realtek: Add GPIO support for RTD1625

 .../bindings/gpio/realtek,rtd1625-gpio.yaml   |  71 ++
 arch/arm64/boot/dts/realtek/kent.dtsi         |  39 ++
 drivers/gpio/Kconfig                          |  14 +-
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-rtd1625.c                   | 610 ++++++++++++++++++
 5 files changed, 734 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/gpio/realtek,rtd1625-gpio.yaml
 create mode 100644 drivers/gpio/gpio-rtd1625.c

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2.43.0