linux-kernel - [PATCH 0/3] Realtek SPI-NAND controller

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Message-ID: <20241006233347.333586-1-chris.packham@alliedtelesis.co.nz>
Date: Mon,  7 Oct 2024 12:33:44 +1300
From: Chris Packham <chris.packham@...iedtelesis.co.nz>
To: broonie@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	tsbogend@...ha.franken.de
Cc: linux-spi@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mips@...r.kernel.org,
	Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH 0/3] Realtek SPI-NAND controller

This series adds support for the SPI-NAND flash controller on the RTL9300
family of SoCs.

There are 2 physical chip selects which are called SPI_MST_CS0 and SPI_MST_CS1
in the datasheet. Via some pin-strapping these can be assigned to either the
SPI-NOR controller or the SPI-NAND controller. Which means you can end up with
the following permutations

  SPI-Flash
  Boot Model SPI_MST_CS0 SPI_MST_CS1
  ---------- ----------- -----------
  NOR x1     NOR-CS0     X
  NOR x2     NOR-CS0     NOR-CS1
  NAND x1    NAND-CS0    X
  NAND x2    NAND-CS0    NAND-CS1
  NOR+NAND   NOR-CS0     NAND-CS0

Chris Packham (3):
  dt-bindings: spi: Add realtek,rtl9300-snand
  mips: dts: realtek: Add SPI NAND controller
  spi: spi-mem: Add Realtek SPI-NAND controller

 .../bindings/spi/realtek,rtl9300-snand.yaml   |  58 +++
 MAINTAINERS                                   |   6 +
 arch/mips/boot/dts/realtek/rtl930x.dtsi       |  12 +
 drivers/spi/Kconfig                           |  11 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-realtek-rtl-snand.c           | 408 ++++++++++++++++++
 6 files changed, 496 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/realtek,rtl9300-snand.yaml
 create mode 100644 drivers/spi/spi-realtek-rtl-snand.c

-- 
2.46.2