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Date:   Thu, 13 Apr 2017 19:15:55 +0200
From:   Ludovic Barre <>
To:     Cyrille Pitchen <>,
        Marek Vasut <>
CC:     David Woodhouse <>,
        Brian Norris <>,
        Boris Brezillon <>,
        Richard Weinberger <>,
        Alexandre Torgue <>,
        Rob Herring <>,
        <>, <>,
Subject: [PATCH v4 0/2] mtd: spi-nor: add stm32 qspi driver

From: Ludovic Barre <>

This patch set adds a SPI-NOR driver for stm32 QSPI controller.
It is a specialized SPI interface for serial Flash devices.
It supports 1 or 2 Flash device with single, dual and quad SPI Flash memories.

It can operate in any of the following modes:
-indirect mode: all the operations are performed using the quadspi
-read memory-mapped mode: the external Flash memory is mapped to the
  microcontroller address space and is seen by the system as if it was
  an internal memory

Changes in v4:
-unsigned bitfields: (1U << 8)
-remove "mtd->priv"
-error management: issue on no mtd device registered
-remove braces in stm32_qspi_mtd_free 

Changes in v3:
-dt-bindings: qspi_mm not optional
-dt-bindings: see ../spi/spi-bus.txt
-dt-bindings: spi@...
-cmd flat struct
-macro to avoid hard value "25"

Changes in v2:
-awful construct: s/u32/u8
-add define for timeout
-Use a helper variable
-add comment on "stm32 qspi controller fsize issue

Ludovic Barre (2):
  dt-bindings: Document the STM32 QSPI bindings
  mtd: spi-nor: add driver for STM32 quad spi flash controller

 .../devicetree/bindings/mtd/stm32-quadspi.txt      |  43 ++
 drivers/mtd/spi-nor/Kconfig                        |   7 +
 drivers/mtd/spi-nor/Makefile                       |   1 +
 drivers/mtd/spi-nor/stm32-quadspi.c                | 694 +++++++++++++++++++++
 4 files changed, 745 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/stm32-quadspi.txt
 create mode 100644 drivers/mtd/spi-nor/stm32-quadspi.c


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