[PATCH v6 3/9] ARM: exynos: Consolidate time keeping and irq enable

Amit Kachhap amit.kachhap at linaro.org
Wed Feb 29 06:41:04 UTC 2012


Hi,

I verified this patch on exynos4 based origen board.

Tested-by: Amit Daniel <amit.kachhap at linaro.org>

Thanks,
Amit D

On 29 February 2012 08:41, Robert Lee <rob.lee at linaro.org> wrote:
> Enable core cpuidle timekeeping and irq enabling and remove that
> handling from this code.
>
> Signed-off-by: Robert Lee <rob.lee at linaro.org>
> ---
>  arch/arm/mach-exynos/cpuidle.c |   53 ++++-----------------------------------
>  1 files changed, 6 insertions(+), 47 deletions(-)
>
> diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
> index 9bf6743..75bb88b 100644
> --- a/arch/arm/mach-exynos/cpuidle.c
> +++ b/arch/arm/mach-exynos/cpuidle.c
> @@ -20,6 +20,7 @@
>  #include <asm/smp_scu.h>
>  #include <asm/suspend.h>
>  #include <asm/unified.h>
> +#include <asm/cpuidle.h>
>  #include <mach/regs-pmu.h>
>  #include <mach/pmu.h>
>
> @@ -34,22 +35,12 @@
>
>  #define S5P_CHECK_AFTR         0xFCBA0D10
>
> -static int exynos4_enter_idle(struct cpuidle_device *dev,
> -                       struct cpuidle_driver *drv,
> -                             int index);
>  static int exynos4_enter_lowpower(struct cpuidle_device *dev,
>                                struct cpuidle_driver *drv,
>                                int index);
>
>  static struct cpuidle_state exynos4_cpuidle_set[] = {
> -       [0] = {
> -               .enter                  = exynos4_enter_idle,
> -               .exit_latency           = 1,
> -               .target_residency       = 100000,
> -               .flags                  = CPUIDLE_FLAG_TIME_VALID,
> -               .name                   = "C0",
> -               .desc                   = "ARM clock gating(WFI)",
> -       },
> +       [0] = CPUIDLE_ARM_WFI_STATE,
>        [1] = {
>                .enter                  = exynos4_enter_lowpower,
>                .exit_latency           = 300,
> @@ -63,8 +54,9 @@ static struct cpuidle_state exynos4_cpuidle_set[] = {
>  static DEFINE_PER_CPU(struct cpuidle_device, exynos4_cpuidle_device);
>
>  static struct cpuidle_driver exynos4_idle_driver = {
> -       .name           = "exynos4_idle",
> -       .owner          = THIS_MODULE,
> +       .name                   = "exynos4_idle",
> +       .owner                  = THIS_MODULE,
> +       .en_core_tk_irqen       = 1,
>  };
>
>  /* Ext-GIC nIRQ/nFIQ is the only wakeup source in AFTR */
> @@ -103,13 +95,8 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev,
>                                struct cpuidle_driver *drv,
>                                int index)
>  {
> -       struct timeval before, after;
> -       int idle_time;
>        unsigned long tmp;
>
> -       local_irq_disable();
> -       do_gettimeofday(&before);
> -
>        exynos4_set_wakeupmask();
>
>        /* Set value of power down register for aftr mode */
> @@ -148,34 +135,6 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev,
>        /* Clear wakeup state register */
>        __raw_writel(0x0, S5P_WAKEUP_STAT);
>
> -       do_gettimeofday(&after);
> -
> -       local_irq_enable();
> -       idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
> -                   (after.tv_usec - before.tv_usec);
> -
> -       dev->last_residency = idle_time;
> -       return index;
> -}
> -
> -static int exynos4_enter_idle(struct cpuidle_device *dev,
> -                               struct cpuidle_driver *drv,
> -                               int index)
> -{
> -       struct timeval before, after;
> -       int idle_time;
> -
> -       local_irq_disable();
> -       do_gettimeofday(&before);
> -
> -       cpu_do_idle();
> -
> -       do_gettimeofday(&after);
> -       local_irq_enable();
> -       idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
> -                   (after.tv_usec - before.tv_usec);
> -
> -       dev->last_residency = idle_time;
>        return index;
>  }
>
> @@ -190,7 +149,7 @@ static int exynos4_enter_lowpower(struct cpuidle_device *dev,
>                new_index = drv->safe_state_index;
>
>        if (new_index == 0)
> -               return exynos4_enter_idle(dev, drv, new_index);
> +               return cpuidle_simple_enter(dev, drv, new_index);
>        else
>                return exynos4_enter_core0_aftr(dev, drv, new_index);
>  }
> --
> 1.7.1
>



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