[PATCH v4 0/7] mtd: rawnand: loongson: Add Loongson-2K nand controller support

From: Binbin Zhou <zhoubinbin@loongson.cn>
To: Binbin Zhou <zhoubb.aaron@gmail.com>,
	Huacai Chen <chenhuacai@loongson.cn>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Keguang Zhang <keguang.zhang@gmail.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
	Xuerui Wang <kernel@xen0n.name>,
	loongarch@lists.linux.dev, devicetree@vger.kernel.org,
	linux-mtd@lists.infradead.org,
	Binbin Zhou <zhoubinbin@loongson.cn>
Subject: [PATCH v4 0/7] mtd: rawnand: loongson: Add Loongson-2K nand controller support
Date: Thu,  4 Sep 2025 21:06:32 +0800	[thread overview]
Message-ID: <cover.1756991031.git.zhoubinbin@loongson.cn> (raw)

Hi all:

This patchset adds support for the Loongson-2K0500/Loongson-2K1000 NAND
controllers, which are similar to the Loongson-1C NAND controller.

They support a maximum capacity of 16GB FLASH per chip, with a maximum
page size of 8KB. The chip supports up to 4 chip selects and 4 RDY signals.

The key difference between the Loongson-2K NAND controllers is that the
Loongson-2K1000 explicitly configures the DMA controller routing, while
the Loongson-2K0500 defaults to using APBDMA0.

Summary of the patchset:
Ptach 1: Rename all prefixes from ls1x to loongson
Patch 2: Add 6-byte NAND ID reading
Patch 3: Add chip select support
Patch 4-5: Add Loongson-2K0500 NAND controller support
Patch 6-7: Add Loongson-2K1000 NAND controller support

Thanks.

-------
V4:
Patch (5/7):
  - Split the flags variable into dma_bits;
  - Chip selects set before requesting the DMA channel;
  - '|' should be last character on the previous line.
Patch (7/7):
  - Use devm_platform_ioremap_resource_byname();
  - Add the dma_config() function pointer to replace the previous flags.

Link to V3:
https://lore.kernel.org/all/cover.1755757841.git.zhoubinbin@loongson.cn/

V3:
Patch (1/7):
  - Merge the first two rename patches;
Patch (3/7)
  - Refact chip capacity calculation. Use a big switch-case
    for writesize, and sort the big switch-case by writesize;
  - Drop the redundant 'nand_cs = 0x0';
Patch (6/7)
  - Add Reviewed-by tag from Rob, thanks.

Link to V2:
https://lore.kernel.org/all/cover.1754890670.git.zhoubinbin@loongson.cn/

V2:
Patch (5/8):
  - Add Acked-by tag from Rob, thanks;
Patch (7/8):
  - Update reg-names attribute description.

Link to V1:
https://lore.kernel.org/all/cover.1753166096.git.zhoubinbin@loongson.cn/

Binbin Zhou (6):
  mtd: rawnand: loongson1: Rename the prefix from ls1x to loongson
  mtd: rawnand: loongson: Add nand chip select support
  dt-bindings: mtd: loongson,ls1b-nand-controller: Document the
    Loongson-2K0500 NAND controller
  mtd: rawnand: loongson: Add Loongson-2K0500 NAND controller support
  dt-bindings: mtd: loongson,ls1b-nand-controller: Document the
    Loongson-2K1000 NAND controller
  mtd: rawnand: loongson: Add Loongson-2K1000 NAND controller support

Keguang Zhang (1):
  mtd: rawnand: loongson: Add 6-byte NAND ID reading support

 .../mtd/loongson,ls1b-nand-controller.yaml    |   56 +-
 MAINTAINERS                                   |    2 +-
 drivers/mtd/nand/raw/Kconfig                  |    8 +-
 drivers/mtd/nand/raw/Makefile                 |    2 +-
 .../mtd/nand/raw/loongson-nand-controller.c   | 1024 +++++++++++++++++
 .../mtd/nand/raw/loongson1-nand-controller.c  |  836 --------------
 6 files changed, 1083 insertions(+), 845 deletions(-)
 create mode 100644 drivers/mtd/nand/raw/loongson-nand-controller.c
 delete mode 100644 drivers/mtd/nand/raw/loongson1-nand-controller.c

base-commit: c9f62564252c21d739a5003e9b2d6ad0828aa7bd
-- 
2.47.3

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