Eric Lee / smarc-fsl-linux-kernel

19 Dec, 2011

1 commit

  • 2f0778afa   ARM: 7205/2: sched_clock: allow sched_clock to be selected at runtime ... Browse Code »
    86

    sched_clock() is yet another blocker on the road to the single
    image. This patch implements an idea by Russell King:

    http://www.spinics.net/lists/linux-omap/msg49561.html

    Instead of asking the platform to implement both sched_clock()
    itself and the rollover callback, simply register a read()
    function, and let the ARM code care about sched_clock() itself,
    the conversion to ns and the rollover. sched_clock() uses
    this read() function as an indirection to the platform code.
    If the platform doesn't provide a read(), the code falls back
    to the jiffy counter (just like the default sched_clock).

    This allow some simplifications and possibly some footprint gain
    when multiple platforms are compiled in. Among the drawbacks,
    the removal of the *_fixed_sched_clock optimization which could
    negatively impact some platforms (sa1100, tegra, versatile
    and omap).

    Tested on 11MPCore, OMAP4 and Tegra.

    Cc: Imre Kaloz
    Cc: Eric Miao
    Cc: Colin Cross
    Cc: Erik Gilling
    Cc: Olof Johansson
    Cc: Sascha Hauer
    Cc: Alessandro Rubini
    Cc: STEricsson
    Cc: Lennert Buytenhek
    Cc: Ben Dooks
    Tested-by: Jamie Iles
    Tested-by: Tony Lindgren
    Tested-by: Kyungmin Park
    Acked-by: Linus Walleij
    Acked-by: Nicolas Pitre
    Acked-by: Krzysztof Halasa
    Acked-by: Kukjin Kim
    Signed-off-by: Marc Zyngier
    Signed-off-by: Russell King

    Marc Zyngier
     

21 Jul, 2011

2 commits

20 Jul, 2011

1 commit

06 Jul, 2011

1 commit

  • 27ea7fd28   ARM: S5P: Fix bug on init of PWMTimers for HRTimer ... Browse Code »

    This patch fixes following.

    [ 0.000000] sched_clock: 32 bits at 33MHz, ...
    [ 128.651309] Calibrating delay loop...

    There is a big jump. The reason is that PWM Timer which
    is for HRTimer was used before its initialization.

    So this patch changes its order and following is kernel
    boot log message after this.

    [ 0.000000] sched_clock: 32 bits at 33MHz, ...
    [ 0.000088] Calibrating delay loop...

    Signed-off-by: Sangbeom Kim
    Signed-off-by: Kukjin Kim

    Sangbeom Kim
     

24 May, 2011

1 commit

  • df4c144f7   ARM: s5p: consolidate selection of timer register ... Browse Code »

    s5p duplicates the runtime selection of the timer register three times.
    Move this out into a separate function.

    FIXME: It is unclear whether this code needs to support true runtime
    selection of the timer register, or whether it can be selected once at
    init time.

    Acked-by: Kukjin Kim
    Signed-off-by: Russell King

    Russell King
     

12 Mar, 2011

1 commit

  • f8bfff8e4   ARM: S5P: HRT support ... Browse Code »

    This patch adds support HR-Timer(High Resolution Timer) and dynamic
    tick system for S5P SoCs. There are many clock sources for HR-Timer
    on S5P SoCs. The PWM timer, RTC, System Timer, and MCT can be used
    for clock source.
    This patch can only support PWM timer for clock source of S5P64X0
    and S5PV210.

    Signed-off-by: Sangbeom Kim
    Signed-off-by: Kukjin Kim

    Sangbeom Kim