Eric Lee / smarc-fsl-linux-kernel

31 Jul, 2010

1 commit

  • 7cfe24947   ARM: AMBA: Add pclk support to AMBA bus infrastructure ... Browse Code »

    Some platforms gate the pclk (APB - the bus - clock) to the peripherals
    for power saving, along with the functional clock. When devices are
    accessed without pclk enabled, the kernel will oops.

    This gives them two options:

    1. Leave all clocks on all the time.
    2. Attempt to gate pclk along with the functional clock.

    (With some hardware, pclk and the functional clock are gated by a single
    bit in a register.)

    (1) has the disadvantage that it causes increased power usage, which is
    bad news for battery operated devices. (2) can lead to kernel oops if
    registers are accessed without the functional clock being enabled.

    So, introduce the apb_pclk signal in such a way existing drivers don't
    need to be updated. Essentially, this means we guarantee that:

    1. pclk will be enabled whenever the driver is bound to a device -
    from probe() to remove() time.
    2. pclk will also be enabled when reading the primecell IDs from the device.

    In order to allow drivers to be incrementally updated to achieve greater
    power savings, we provide two additional calls to allow drivers to
    manage the pclk - amba_pclk_enable()/amba_pclk_disable().

    Signed-off-by: Russell King

    Russell King
     

12 Sep, 2009

1 commit

02 Sep, 2009

1 commit

06 Jul, 2009

1 commit

  • 557dca5f4   [ARM] amba: fix amba device resources ... Browse Code »

    AMBA device resources were being reported as:

    10004000-10004fff :

    This is because dev_name() was returning NULL prior to device_register.
    Ensure that the struct device is properly initialized, and the name is
    set before adding it to the device tree.

    Signed-off-by: Russell King

    Russell King
     

25 Mar, 2009

1 commit

09 Jan, 2009

1 commit

  • 934848daa   [ARM] Fix realview build ... Browse Code »

    arch/arm/mach-realview/platsmp.c:140: error: 'jiffies' undeclared (first use in this function)
    drivers/amba/bus.c:246: error: 'NO_IRQ' undeclared (first use in this function)

    Signed-off-by: Russell King

    Russell King
     

13 Oct, 2007

1 commit

  • 7eff2e7a8   Driver core: change add_uevent_var to use a struct ... Browse Code »

    This changes the uevent buffer functions to use a struct instead of a
    long list of parameters. It does no longer require the caller to do the
    proper buffer termination and size accounting, which is currently wrong
    in some places. It fixes a known bug where parts of the uevent
    environment are overwritten because of wrong index calculations.

    Many thanks to Mathieu Desnoyers for finding bugs and improving the
    error handling.

    Signed-off-by: Kay Sievers
    Cc: Mathieu Desnoyers
    Cc: Cornelia Huck
    Signed-off-by: Greg Kroah-Hartman

    Kay Sievers
     

28 Apr, 2007

1 commit

30 Nov, 2006

1 commit

28 Jun, 2006

1 commit

09 Jan, 2006

1 commit

07 Jan, 2006

1 commit