Eric Lee / smarc-uboot

28 Oct, 2015

1 commit

15 Oct, 2013

1 commit

07 Aug, 2013

1 commit

24 Jul, 2013

1 commit

19 Mar, 2013

1 commit

19 Sep, 2012

1 commit

  • f138ca137   mpc8xxx_spi: fix SPI support on MPC8308RDB ... Browse Code »

    The MPC8308RDB Reference Manual states that no bits in the SPMODE
    register are allowed to change while the enable (EN) bit is set.

    This driver changes the character length bits (LEN) while the enable
    (EN) bit is set. Clearing the EN bit while changing the LEN bits makes
    the driver work correctly on MPC8308RDB.

    Signed-off-by: Ira W. Snyder
    Signed-off-by: Kim Phillips

    Ira W. Snyder
     

22 Apr, 2010

1 commit

  • a47a12bec   Move arch/ppc to arch/powerpc ... Browse Code »

    As discussed on the list, move "arch/ppc" to "arch/powerpc" to
    better match the Linux directory structure.

    Please note that this patch also changes the "ppc" target in
    MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
    is kept as an alias for now, to not break compatibility with
    scripts using this name.

    Signed-off-by: Stefan Roese
    Acked-by: Wolfgang Denk
    Acked-by: Detlev Zundel
    Acked-by: Kim Phillips
    Cc: Peter Tyser
    Cc: Anatolij Gustschin

    Stefan Roese
     

13 Apr, 2010

1 commit

19 Oct, 2008

1 commit

02 Jul, 2008

1 commit

04 Jun, 2008

1 commit

  • d255bb0e7   SPI API improvements ... Browse Code »

    This patch gets rid of the spi_chipsel table and adds a handful of new
    functions that makes the SPI layer cleaner and more flexible.

    Instead of the spi_chipsel table, each board that wants to use SPI
    gets to implement three hooks:
    * spi_cs_activate(): Activates the chipselect for a given slave
    * spi_cs_deactivate(): Deactivates the chipselect for a given slave
    * spi_cs_is_valid(): Determines if the given bus/chipselect
    combination can be activated.

    Not all drivers may need those extra functions however. If that's the
    case, the board code may just leave them out (assuming they know what
    the driver needs) or rely on the linker to strip them out (assuming
    --gc-sections is being used.)

    To set up communication parameters for a given slave, the driver needs
    to call spi_setup_slave(). This returns a pointer to an opaque
    spi_slave struct which must be passed as a parameter to subsequent SPI
    calls. This struct can be freed by calling spi_free_slave(), but most
    driver probably don't want to do this.

    Before starting one or more SPI transfers, the driver must call
    spi_claim_bus() to gain exclusive access to the SPI bus and initialize
    the hardware. When all transfers are done, the driver must call
    spi_release_bus() to make the bus available to others, and possibly
    shut down the SPI controller hardware.

    spi_xfer() behaves mostly the same as before, but it now takes a
    spi_slave parameter instead of a spi_chipsel function pointer. It also
    got a new parameter, flags, which is used to specify chip select
    behaviour. This may be extended with other flags in the future.

    This patch has been build-tested on all powerpc and arm boards
    involved. I have not tested NIOS since I don't have a toolchain for it
    installed, so I expect some breakage there even though I've tried
    fixing up everything I could find by visual inspection.

    I have run-time tested this on AVR32 ATNGW100 using the atmel_spi and
    DataFlash drivers posted as a follow-up. I'd like some help testing
    other boards that use the existing SPI API.

    But most of all, I'd like some comments on the new API. Is this stuff
    usable for everyone? If not, why?

    Changed in v4:
    - Build fixes for various boards, drivers and commands
    - Provide common struct spi_slave definition that can be extended by
    drivers
    - Pass a struct spi_slave * to spi_cs_activate and spi_cs_deactivate
    - Make default bus and mode build-time configurable
    - Override default SPI bus ID and mode on mx32ads and imx31_litekit.

    Changed in v3:
    - Add opaque struct spi_slave for controller-specific data associated
    with a slave.
    - Add spi_claim_bus() and spi_release_bus()
    - Add spi_free_slave()
    - spi_setup() is now called spi_setup_slave() and returns a
    struct spi_slave
    - soft_spi now supports four SPI modes (CPOL|CPHA)
    - Add bus parameter to spi_setup_slave()
    - Convert the new i.MX32 SPI driver
    - Convert the new MC13783 RTC driver

    Changed in v2:
    - Convert the mpc8xxx_spi driver and the mpc8349emds board to the
    new API.

    Signed-off-by: Haavard Skinnemoen
    Tested-by: Guennadi Liakhovetski

    Haavard Skinnemoen
     

30 Jan, 2008

1 commit

18 Jan, 2008

2 commits