This series adds support for Loongson 2K0300's GPIO controller. While
being mostly identical to previous implementation, its interrupt
functionality hasn't been implemented in gpio-loongson-64bit.c. PATCH 2
implements its interrupt support with an IRQCHIP, and the code could be
reused for other Loongson SoCs with similar interrupt functionality like
2K1500 and 2K2000.

Tested on CTCISZ Forever Pi, reading/writing GPIOs works correctly, and
both level and edge interrupts could be triggered.

The devicetree patch depends on series "Support reset controller of
Loongson 2K0300 SoC"[1] for a clean apply. Thanks for your time and
review.

Changed from v1:
- Rebase on top of gpio/for-next, adapt changes that convert
  gpio-loongson-64bit.c to use generic gpiochip.
- Collect review tags
- Link to v1: https://lore.kernel.org/all/20250816035027.11727-2-ziyao@disroot.org/

[1]: https://lore.kernel.org/all/20250816033327.11359-2-ziyao@disroot.org/

Yao Zi (3):
  dt-bindings: gpio: loongson: Document GPIO controller of 2K0300 SoC
  gpio: loongson-64bit: Add support for Loongson 2K0300 SoC
  LoongArch: dts: Add GPIO controller for Loongson 2K0300

 .../bindings/gpio/loongson,ls-gpio.yaml       |  28 ++-
 arch/loongarch/boot/dts/loongson-2k0300.dtsi  |  20 ++
 drivers/gpio/Kconfig                          |   1 +
 drivers/gpio/gpio-loongson-64bit.c            | 191 +++++++++++++++++-
 4 files changed, 232 insertions(+), 8 deletions(-)

-- 
2.50.1