[PATCH v3 0/7] gpio: realtek: Add support for Realtek DHC RTD1625

[Yu-Chun Lin]

Hi all,

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.

To accommodate this, we extend the gpio-regmap core framework to handle
per-pin register operations, write-enable mechanisms, and add custom
set_config callback.

Best Regards,
Yu-Chun Lin
---
Changes in v3:

patch 1 (gpio: Replace "default y" with "default ARCH_REATLEK" in Kconfig):
- Chang "remove default y" to "replace it with default ARCH_REALTEK".

patch 2 (gpio: regmap: add gpio_regmap_get_gpiochip() accessor):
- New patch

patch 3 (gpio: regmap: Add gpio_regmap_operation and write-enable support):
- New patch
- Update all drivers utilizing the gpio-regmap framework to accommodate
the new reg_mask_xlate function signature.

patch 4 (gpio: regmap: Add set_config callback):
- New patch

patch 5 (dt-bindings: gpio: realtek: Add realtek,rtd1625-gpio):
- Remove description for reg.
- Add Reviewed-by tag from Krzysztof.

patch 6 (gpio: realtek: Add driver for Realtek DHC RTD1625 SoC):
- Refactor to utilize the gpio-regmap framework.
- Create a custom irqdomain.

patch 7(arm64: dts: realtek: Add GPIO support for RTD1625):
- Add Reviewed-by tag from Bartosz.

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 (5):
  gpio: Replace "default y" with "default ARCH_REALTEK" in Kconfig
  gpio: regmap: add gpio_regmap_get_gpiochip() accessor
  gpio: regmap: Add gpio_regmap_operation and write-enable support
  gpio: regmap: Add set_config callback
  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                          |  15 +-
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-104-idi-48.c                |  18 +-
 drivers/gpio/gpio-i8255.c                     |  13 +-
 drivers/gpio/gpio-idio-16.c                   |  16 +-
 drivers/gpio/gpio-max7360.c                   |  10 +
 drivers/gpio/gpio-pcie-idio-24.c              |  15 +-
 drivers/gpio/gpio-regmap.c                    |  80 ++-
 drivers/gpio/gpio-rtd1625.c                   | 608 ++++++++++++++++++
 drivers/iio/adc/ad7173.c                      |  32 +-
 drivers/iio/addac/stx104.c                    |  17 +-
 drivers/pinctrl/bcm/pinctrl-bcm63xx.c         |  12 +-
 drivers/pinctrl/pinctrl-tps6594.c             |  10 +
 include/linux/gpio/regmap.h                   |  51 +-
 16 files changed, 963 insertions(+), 45 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/gpio/realtek,rtd1625-gpio.yaml
 create mode 100644 drivers/gpio/gpio-rtd1625.c

-- 
2.34.1