Eric Lee / smarc-ti-linux-kernel

20 Oct, 2014

1 commit

16 Feb, 2014

1 commit

  • 78e39523b   spi: Remove explictly set bus_num and num_chipselect to default setting ... Browse Code »

    The purpose of commit 1e8a52e18cfb
    "spi: By default setup spi_masters with 1 chipselect and dynamics bus number"
    is to avoid setting default value for bus_num and num_chipselect in spi master
    drivers. So let's remove the duplicate code.

    Signed-off-by: Axel Lin
    Acked-by: Uwe Kleine-König
    Acked-By: David Daney
    Acked-by: Stephen Warren
    Signed-off-by: Mark Brown

    Axel Lin
     

18 Dec, 2013

1 commit

28 Nov, 2013

1 commit

15 Nov, 2013

2 commits

26 Sep, 2013

1 commit

23 Aug, 2013

1 commit

  • 7bc003100   spi: bcm2835: Add spi_master_get() call to prevent use after free ... Browse Code »

    The call to spi_unregister_master results in device memory being freed, it must
    no longer be accessed afterwards. Thus call spi_master_get() to get an extra
    reference to the device and call spi_master_put() only after the last access to
    device data.

    Note, current code has an extra spi_master_put() call in bcm2835_spi_remove().
    Thus this patch just adds an spi_master_get() to balance the reference count.

    Signed-off-by: Axel Lin
    Signed-off-by: Mark Brown

    Axel Lin
     

05 Aug, 2013

1 commit

24 Jul, 2013

1 commit

13 May, 2013

1 commit

01 Apr, 2013

1 commit

13 Mar, 2013

1 commit

  • f8043872e   spi: add driver for BCM2835 ... Browse Code »

    The BCM2835 contains two forms of SPI master controller (one known
    simply as SPI0, and the other known as the "Universal SPI Master", in
    the auxilliary block) and one form of SPI slave controller. This patch
    adds support for the SPI0 controller.

    This driver is taken from Chris Boot's repository at
    git://github.com/bootc/linux.git rpi-linear
    as of commit 6de2905 "spi-bcm2708: fix printf with spurious %s".
    In the first SPI-related commit there, Chris wrote:

    Thanks to csoutreach / A Robinson for his driver which I used as an
    inspiration. You can find his version here:
    http://piface.openlx.org.uk/raspberry-pi-spi-kernel-driver-available-for

    Changes made during upstreaming:
    * Renamed bcm2708 to bcm2835 as per upstream naming for this SoC.
    * Removed support for brcm,realtime property.
    * Increased transfer timeout to 30 seconds.
    * Return IRQ_NONE from the IRQ handler if no interrupt was handled.
    * Disable TA (Transfer Active) and clear FIFOs on a transfer timeout.
    * Wrote device tree binding documentation.
    * Request unnamed clock rather than "sys_pclk"; the DT will provide the
    correct clock.
    * Assume that tfr->speed_hz and tfr->bits_per_word are always set in
    bcm2835_spi_start_transfer(), bcm2835_spi_transfer_one(), so no need
    to check spi->speed_hz or tft->bits_per_word.
    * Re-ordered probe() to remove the need for temporary variables.
    * Call clk_disable_unprepare() rather than just clk_unprepare() on probe()
    failure.
    * Don't use devm_request_irq(), to ensure that the IRQ doesn't fire after
    we've torn down the device, but not unhooked the IRQ.
    * Moved probe()'s call to clk_prepare_enable() so we can be sure the clock
    is enabled if the IRQ handler fires immediately.
    * Remove redundant checks from bcm2835_spi_check_transfer() and
    bcm2835_spi_setup().
    * Re-ordered IRQ handler to check for RXR before DONE. Added comments to
    ISR.
    * Removed empty prepare/unprepare implementations.
    * Removed use of devinit/devexit.
    * Added BCM2835_ prefix to defines.

    Signed-off-by: Chris Boot
    Signed-off-by: Stephen Warren
    Signed-off-by: Mark Brown

    Chris Boot