linux-kernel - [PATCH v3 0/3] Support GPIO controller of Loongson-2K0300 SoC

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Message-ID: <20250904013438.2405-1-ziyao@disroot.org>
Date: Thu,  4 Sep 2025 01:34:35 +0000
From: Yao Zi <ziyao@...root.org>
To: Yinbo Zhu <zhuyinbo@...ngson.cn>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	loongarch@...ts.linux.dev,
	Mingcong Bai <jeffbai@...c.io>,
	Kexy Biscuit <kexybiscuit@...c.io>,
	Yao Zi <ziyao@...root.org>
Subject: [PATCH v3 0/3] Support GPIO controller of Loongson-2K0300 SoC

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
LS2K1500 and LS2K2000.

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 v2:
- Adjust SoC naming style
- Fold some multi-line calls to dev_err_probe() in the driver into a
  single line
- Collect review tags
- Link to v2: https://lore.kernel.org/all/20250901133804.38433-1-ziyao@disroot.org/
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 LS2K0300 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            | 189 +++++++++++++++++-
 4 files changed, 230 insertions(+), 8 deletions(-)

-- 
2.50.1