linux-kernel - [PATCH v2 0/3] Nuvoton WPCM450 FIU SPI flash controller

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Message-Id: <20221124191400.287918-1-j.neuschaefer@gmx.net>
Date:   Thu, 24 Nov 2022 20:13:57 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linux-spi@...r.kernel.org, openbmc@...ts.ozlabs.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] Nuvoton WPCM450 FIU SPI flash controller

This patchset adds DT bindings and a driver for the Flash Interface Unit
(FIU), the SPI flash controller in the Nuvoton WPCM450 BMC SoC. It
supports four chip selects, and direct (memory-mapped) access to 16 MiB
per chip. Larger flash chips can be accessed by software-defined SPI
transfers.

The existing NPCM7xx FIU driver is sufficitently incompatible with the
WPCM450 FIU that I decided to write a new driver.

Changelog for v2:

- Dropped the patches which have been applied in the meantime, leaving
  only three out of eight
- Changed the binding to require both items in the reg property, because
  there is no need to keep the second item optional, suggested by
  Krzysztof Kozlowski
- Various other cleanups suggested by Krzysztof Kozlowski and the kernel
  test robot


Jonathan


Jonathan Neuschäfer (3):
  dt-bindings: spi: Add Nuvoton WPCM450 Flash Interface Unit (FIU)
  spi: wpcm-fiu: Add driver for Nuvoton WPCM450 Flash Interface Unit
    (FIU)
  spi: wpcm-fiu: Add direct map support

 .../bindings/spi/nuvoton,wpcm450-fiu.yaml     |  66 +++
 drivers/spi/Kconfig                           |  11 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-wpcm-fiu.c                    | 508 ++++++++++++++++++
 4 files changed, 586 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,wpcm450-fiu.yaml
 create mode 100644 drivers/spi/spi-wpcm-fiu.c

--
2.35.1