Eric Lee / smarc-fsl-linux-kernel

04 Dec, 2009

1 commit

  • af901ca18   tree-wide: fix assorted typos all over the place ... Browse Code »

    That is "success", "unknown", "through", "performance", "[re|un]mapping"
    , "access", "default", "reasonable", "[con]currently", "temperature"
    , "channel", "[un]used", "application", "example","hierarchy", "therefore"
    , "[over|under]flow", "contiguous", "threshold", "enough" and others.

    Signed-off-by: André Goddard Rosa
    Signed-off-by: Jiri Kosina

    André Goddard Rosa
     

23 Sep, 2009

1 commit

22 Apr, 2009

1 commit

  • 6e538aaf5   spi: documentation: emphasise spi_master.setup() semantics ... Browse Code »

    This is a doc-only patch which I hope will reduce the number of
    spi_master controller driver patches starting out with a common
    implementation bug.

    (As in: almost every spi_master driver I see starts out with its
    version of this bug. Sigh.)

    It just re-emphasizes that the setup() method may be called for one
    device while a transfer is active on another ... which means that most
    driver implementations shouldn't touch any registers.

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Brownell
     

02 Dec, 2008

1 commit

07 Aug, 2008

1 commit

09 Apr, 2008

1 commit

  • 6395bee7e   spi: documentation tweaks ... Browse Code »

    Update SPI documentation to clarify some areas of recent confusion: clock
    polarity takes effect when chipselect goes active; and zero length buffers are
    OK in certain cases.

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Brownell
     

17 Oct, 2007

1 commit

  • 49dce689a   spi doesn't need class_device ... Browse Code »

    Make the SPI framework and drivers stop using class_device. Update docs
    accordingly ... highlighting just which sysfs paths should be
    "safe"/stable.

    Signed-off-by: Tony Jones
    Signed-off-by: David Brownell
    Cc: Greg KH
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Tony Jones
     

24 May, 2007

1 commit

09 May, 2007

1 commit

  • 33e34dc6e   SPI kerneldoc ... Browse Code »

    Various documentation updates for the SPI infrastructure, to clarify things
    that may not have been clear, to cope with lack of editing, and fix
    omissions.

    Also, plug SPI into the kernel-api DocBook template, and fix all the
    resulting glitches in document generation.

    Signed-off-by: David Brownell
    Cc: "Randy.Dunlap"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Brownell
     

13 Feb, 2007

2 commits

04 Oct, 2006

1 commit

17 May, 2006

1 commit

  • a020ed752   [PATCH] SPI: busnum == 0 needs to work ... Browse Code »

    We need to be able to have a "SPI bus 0" matching chip numbering; but
    that number was wrongly used to flag dynamic allocation of a bus number.

    This patch resolves that issue; now negative numbers trigger dynamic alloc.

    It also updates the how-to-write-a-controller-driver overview to mention
    this stuff.

    Signed-off-by: David Brownell
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     

14 Jan, 2006

4 commits

  • 7111763d3   [PATCH] spi: misc fixes ... Browse Code »

    This collects some small SPI patches that seem to be missing from the MM tree:

    - spi_butterfly kbuild hooks got dropped somehow; this restores them
    - quick fix for a (theoretical?) m25p80_write() oops noted by Andrew
    - quick fix for a potential config-specific oops for mtd_dataflash()
    - minor doc tweaks

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     
  • 0c868461f   [PATCH] SPI core tweaks, bugfix ... Browse Code »

    This includes various updates to the SPI core:

    - Fixes a driver model refcount bug in spi_unregister_master() paths.

    - The spi_master structures now have wrappers which help keep drivers
    from needing class-level get/put for device data or for refcounts.

    - Check for a few setup errors that would cause oopsing later.

    - Docs say more about memory management. Highlights the use of DMA-safe
    i/o buffers, and zero-initializing spi_message and such metadata.

    - Provide a simple alloc/free for spi_message and its spi_transfer;
    this is only one of the possible memory management policies.

    Nothing to break code that already works.

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     
  • b885244eb   [PATCH] spi: add spi_driver to SPI framework ... Browse Code »

    This is a refresh of the "Simple SPI Framework" found in 2.6.15-rc3-mm1
    which makes the following changes:

    * There's now a "struct spi_driver". This increase the footprint
    of the core a bit, since it now includes code to do what the driver
    core was previously handling directly. Documentation and comments
    were updated to match.

    * spi_alloc_master() now does class_device_initialize(), so it can
    at least be refcounted before spi_register_master(). To match,
    spi_register_master() switched over to class_device_add().

    * States explicitly that after transfer errors, spi_devices will be
    deselected. We want fault recovery procedures to work the same
    for all controller drivers.

    * Minor tweaks: controller_data no longer points to readonly data;
    prevent some potential cast-from-null bugs with container_of calls;
    clarifies some existing kerneldoc,

    And a few small cleanups.

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     
  • 8ae12a0d8   [PATCH] spi: simple SPI framework ... Browse Code »

    This is the core of a small SPI framework, implementing the model of a
    queue of messages which complete asynchronously (with thin synchronous
    wrappers on top).

    - It's still less than 2KB of ".text" (ARM). If there's got to be a
    mid-layer for something so simple, that's the right size budget. :)

    - The guts use board-specific SPI device tables to build the driver
    model tree. (Hardware probing is rarely an option.)

    - This version of Kconfig includes no drivers. At this writing there
    are two known master controller drivers (PXA/SSP, OMAP MicroWire)
    and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
    mentions of other drivers in development.

    - No userspace API. There are several implementations to compare.
    Implement them like any other driver, and bind them with sysfs.

    The changes from last version posted to LKML (on 11-Nov-2005) are minor,
    and include:

    - One bugfix (removes a FIXME), with the visible effect of making device
    names be "spiB.C" where B is the bus number and C is the chipselect.

    - The "caller provides DMA mappings" mechanism now has kerneldoc, for
    DMA drivers that want to be fancy.

    - Hey, the framework init can be subsys_init. Even though board init
    logic fires earlier, at arch_init ... since the framework init is
    for driver support, and the board init support uses static init.

    - Various additional spec/doc clarifications based on discussions
    with other folk. It adds a brief "thank you" at the end, for folk
    who've helped nudge this framework into existence.

    As I've said before, I think that "protocol tweaking" is the main support
    that this driver framework will need to evolve.

    From: Mark Underwood

    Update the SPI framework to remove a potential priority inversion case by
    reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.

    Signed-off-by: David Brownell
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    David Brownell