linux-kernel - [PATCH v4 0/8] Add clock support for Loongson 2K0300 SoC

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Message-ID: <20250919142649.58859-1-ziyao@disroot.org>
Date: Fri, 19 Sep 2025 14:26:41 +0000
From: Yao Zi <ziyao@...root.org>
To: Yinbo Zhu <zhuyinbo@...ngson.cn>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	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>
Cc: linux-clk@...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 v4 0/8] Add clock support for Loongson 2K0300 SoC

This series adds support for Loongson-2K0300's clock controller.
Loongson 2 clock driver is prepared to support more clock variants and
its flexibility is improved. All clock hardwares except the output one
for GMAC module are then defined.

A clock tree dump could be obtained here[1]. Devicetree changes (PATCH 7
and 8) depends on v3 of series "Initial support for CTCISZ Forever Pi"[2]
to apply.

[1]: https://gist.github.com/ziyao233/5261c5983d7ccb0a4299cfd7f26b2027
[2]: https://lore.kernel.org/all/20250523095408.25919-1-ziyao@disroot.org/

Changed from v3:
- Collect review tags
- Change "Loongson 2K0300" to "Loongson-2K0300", and "2K0300" to
  "LS2K0300" in commit messages
- dt-bindings
  - Merge loongson,ls2k0300-clk.h into loongson,ls2k-clk.h
  - Change LS2K0300_PLL_{NODE,DDR,PIX} to LS2K0300_{NODE,DDR,PIX}_PLL
    for consistency
- driver
  - Fold clock definition into a single line if possible
- Link to v3: https://lore.kernel.org/all/20250805150147.25909-1-ziyao@disroot.org/

Changed from v2:
- Disallow clock-names property for loongson,2k0300-clk's binding, avoid
  overriding content of clock-names property within an allOf block
- Correct clock-controller's MMIO-region size in SoC devicetree
- Link to v2: https://lore.kernel.org/all/20250617162426.12629-1-ziyao@disroot.org/

Changed from v1:
- Fold loongson,ls2k0300-clk.yaml into loongson,ls2k-clk.yaml
- Include the new binding header in MAINTAINERS
- Link to v1: https://lore.kernel.org/all/20250523104552.32742-1-ziyao@disroot.org/

Yao Zi (8):
  dt-bindings: clock: loongson2: Add Loongson-2K0300 compatible
  clk: loongson2: Allow specifying clock flags for gate clock
  clk: loongson2: Support scale clocks with an alternative mode
  clk: loongson2: Allow zero divisors for dividers
  clk: loongson2: Avoid hardcoding firmware name of the reference clock
  clk: loongson2: Add clock definitions for Loongson-2K0300 SoC
  LoongArch: dts: Add clock tree for Loongson-2K0300
  LoongArch: dts: Remove clock-frquency from UART0 of CTCISZ Forever Pi

 .../bindings/clock/loongson,ls2k-clk.yaml     |  18 ++-
 .../dts/loongson-2k0300-ctcisz-forever-pi.dts |   1 -
 arch/loongarch/boot/dts/loongson-2k0300.dtsi  |  16 ++-
 drivers/clk/clk-loongson2.c                   | 122 +++++++++++++++---
 include/dt-bindings/clock/loongson,ls2k-clk.h |  36 ++++++
 5 files changed, 166 insertions(+), 27 deletions(-)

-- 
2.50.1