linux-kernel - [PATCH v3 0/3] spi-nor: Add support for Intel SPI serial flash controller

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Date:	Mon, 15 Aug 2016 10:10:41 +0300
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	linux-mtd@...ts.infradead.org
Cc:	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Lee Jones <lee.jones@...aro.org>,
	Peter Tyser <ptyser@...-inc.com>, key.seong.lim@...el.com,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] spi-nor: Add support for Intel SPI serial flash controller

Hi,

This is third version of the series. Previous versions can be found:

  v2: http://lists.infradead.org/pipermail/linux-mtd/2016-June/068277.html
  v1: https://lkml.org/lkml/2016/6/14/269

This series adds support for the Intel SPI serial flash controller found on
many recent Intel CPUs including Baytrail and Braswell. This driver makes
it possible to access the BIOS and other platform data which is stored on
the SPI serial flash. It is also possible to upgrade the BIOS using this
driver if it has not been protected by special hardware bits.

The patch [1/3] includes documentation how to upgrade BIOS on MinnowBoard
MAX.

Since poking the SPI serial flash can brick the machine, this driver can
only be enabled when CONFIG_EXPERT=y and even then it will remain read-only
unless instructed othwerwise by module parameter.

Lee can you ACK/NACK the MFD parts so that we can merge the whole series
through the MTD tree?

Changes from v2:

  * Rebased on top of v4.8-rc2

  * Updated intel_spi_read/write() according spi-nor core changes which
    drops retlen parameter and returns number of bytes read/written.

Changes from v1:

[1/3] spi-nor: Add support for Intel SPI serial flash controller

  * Older hardware does not support 64k erase command so added erase_64k
    flag which is set only for Broxton (BXT).

  * Fix protection range offset for Broxton. Now there is ispi->pregs
    pointing to the start of the protection registers.

  * Change naming of constants from BCR_BYT -> BYT_BCR and so on.

[2/3] mfd: lpc_ich: Add support for SPI serial flash host controller

  * Drop lpc_ich_finalize_spi_cell() and initialize cell directly in
    lpc_ich_init_spi().

  * Use info->type in switch in lpc_ich_init_spi().

  * Add defines for magic numbers used in lpc_ich_init_spi().

  * Use PLATFORM_DEVID_NONE with mfd_add_devices().

[3/3] mfd: lpc_ich: Add support for Intel Apollo Lake SoC

  * No changes

Mika Westerberg (3):
  spi-nor: Add support for Intel SPI serial flash controller
  mfd: lpc_ich: Add support for SPI serial flash host controller
  mfd: lpc_ich: Add support for Intel Apollo Lake SoC

 Documentation/mtd/intel-spi.txt          |  88 ++++
 drivers/mfd/lpc_ich.c                    | 131 ++++++
 drivers/mtd/spi-nor/Kconfig              |  20 +
 drivers/mtd/spi-nor/Makefile             |   2 +
 drivers/mtd/spi-nor/intel-spi-platform.c |  57 +++
 drivers/mtd/spi-nor/intel-spi.c          | 780 +++++++++++++++++++++++++++++++
 drivers/mtd/spi-nor/intel-spi.h          |  24 +
 include/linux/mfd/lpc_ich.h              |   3 +
 include/linux/platform_data/intel-spi.h  |  31 ++
 9 files changed, 1136 insertions(+)
 create mode 100644 Documentation/mtd/intel-spi.txt
 create mode 100644 drivers/mtd/spi-nor/intel-spi-platform.c
 create mode 100644 drivers/mtd/spi-nor/intel-spi.c
 create mode 100644 drivers/mtd/spi-nor/intel-spi.h
 create mode 100644 include/linux/platform_data/intel-spi.h

-- 
2.8.1