From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Shijie Subject: [PATCH V2 0/4] mtd: spi-nor: add a new framework for SPI NOR Date: Fri, 6 Dec 2013 16:32:40 +0800 Message-ID: <1386318764-15882-1-git-send-email-b32955@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , , , , Huang Shijie To: Return-path: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: 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. Add spi_nor_xfer_cfg {} for the fundamental primitives: read_xfer/write_xfer. Make the m25p80.c use the new APIs. Let's discuss the SPI nor framework in the new thread. :) 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. v1 --> v2: [1] follow Angus's advice, add more hooks and data structrures. [2] others. Huang Shijie (4): mtd: spi-nor: copy the SPI NOR commands to a new header file mtd: spi-nor: add the basic data structures mtd: spi-nor: add the framework for SPI NOR mtd: m25p80: use the SPI nor framework drivers/mtd/Kconfig | 2 + drivers/mtd/Makefile | 1 + drivers/mtd/devices/Kconfig | 2 +- drivers/mtd/devices/m25p80.c | 1261 +++-------------------------------------- drivers/mtd/spi-nor/Kconfig | 6 + drivers/mtd/spi-nor/Makefile | 1 + drivers/mtd/spi-nor/spi-nor.c | 1042 ++++++++++++++++++++++++++++++++++ include/linux/mtd/spi-nor.h | 132 +++++ 8 files changed, 1277 insertions(+), 1170 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 -- 1.7.2.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html