[PATCH 0/4] mtd: spi-nor: add a new framework for SPI NOR
Brian Norris
computersforpeace at gmail.com
Tue Nov 26 23:32:53 EST 2013
+ Lee Jones, others
I'd like to keep a similar CC list for the various conversations going
on about SPI NOR frameworks.
On Tue, Nov 26, 2013 at 02:32:51PM +0800, Huang Shijie wrote:
> 1.) Why add a new framework for SPI NOR?
> The SPI-NOR controller such as Freescale's Quadspi controller is working
> in a different way from the SPI bus. It should knows the NOR commands to
> find the right LUT sequence. Unfortunately, the current code can not meet
> this requirement.
>
> 2.) How does this patch set do?
> This patch set adds a new spi-nor layer.
> Before this patch, the layer is like:
>
> MTD
> ------------------------
> m25p80
> ------------------------
> spi bus driver
> ------------------------
> SPI NOR chip
>
> After this patch, the layer is like:
> MTD
> ------------------------
> spi-nor
> ------------------------
> m25p80
> ------------------------
> spi bus driver
> ------------------------
> SPI NOR chip
>
> With the spi-nor controller driver(Freescale Quadspi), it looks like:
> MTD
> ------------------------
> spi-nor
> ------------------------
> fsl-quadspi
> ------------------------
> SPI NOR chip
>
> 3.) more details
> This patch set adds a new data structrue spi_nor{}, clones most the common
> code to spi-nor.c. Make the m25p80.c use the new APIs.
>
> 4.) TODO list:
> 3.1) add the new spi_nor_device{} for the spi-nor controller's device.
> 3.2) add the Freescale Quadspi driver.
>
>
> Huang Shijie (4):
> mtd: spi-nor: move the SPI NOR commands to a new header file
> mtd: spi-nor: add a new data structrue spi_nor{}
> mtd: spi-nor: add the framework for SPI NOR
> mtd: m25p80: use the new spi-nor APIs
>
> drivers/mtd/Kconfig | 2 +
> drivers/mtd/Makefile | 1 +
> drivers/mtd/devices/Kconfig | 2 +-
> drivers/mtd/devices/m25p80.c | 1249 +++--------------------------------------
> drivers/mtd/spi-nor/Kconfig | 6 +
> drivers/mtd/spi-nor/Makefile | 1 +
> drivers/mtd/spi-nor/spi-nor.c | 1057 ++++++++++++++++++++++++++++++++++
> include/linux/mtd/spi-nor.h | 101 ++++
> 8 files changed, 1239 insertions(+), 1180 deletions(-)
> create mode 100644 drivers/mtd/spi-nor/Kconfig
> create mode 100644 drivers/mtd/spi-nor/Makefile
> create mode 100644 drivers/mtd/spi-nor/spi-nor.c
> create mode 100644 include/linux/mtd/spi-nor.h
>
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