[PATCH v4 0/2] mtd: spi-nor: add stm32 qspi driver

[Ludovic Barre <ludovic.Barre-qxv4g6HH51o@public.gmane.org>]

From: Ludovic Barre <ludovic.barre-qxv4g6HH51o@public.gmane.org>

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
  registers
-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
-ratelimit
-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

-- 
2.7.4

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