[PATCH] ARM: exynos: Allow wake-up using GIC interrupts

[Abhilash Kesavan]

Hi Tomasz,

On Tue, Oct 15, 2013 at 10:12 PM, Tomasz Figa <t.figa at samsung.com> wrote:
> This patch restores the ability to receive wake-up events from internal
> GIC interrupts, e.g. RTC tick or alarm interrupts.
>
> Signed-off-by: Tomasz Figa <t.figa at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> ---
>  arch/arm/mach-exynos/include/mach/pm-core.h |  1 -
>  arch/arm/mach-exynos/pm.c                   | 55 +++++++++++++++++++++++++++++
>  2 files changed, 55 insertions(+), 1 deletion(-)
>

I don't see this patch in kgene's tree or linux-next. Was this handled
some other way ? I have been testing s2r with this patch on exynos5250
and it works fine.

> diff --git a/arch/arm/mach-exynos/include/mach/pm-core.h b/arch/arm/mach-exynos/include/mach/pm-core.h
> index 2b00833..be112ce 100644
> --- a/arch/arm/mach-exynos/include/mach/pm-core.h
> +++ b/arch/arm/mach-exynos/include/mach/pm-core.h
> @@ -66,7 +66,6 @@ static inline void samsung_pm_saved_gpios(void)
>
>  /* Compatibility definitions to make plat-samsung/pm.c compile */
>  #define IRQ_EINT_BIT(x)                1
> -#define s3c_irqwake_intallow   0
>  #define s3c_irqwake_eintallow  0
>
>  #endif /* __ASM_ARCH_PM_CORE_H */
> diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
> index c679db5..1f24e7f 100644
> --- a/arch/arm/mach-exynos/pm.c
> +++ b/arch/arm/mach-exynos/pm.c
> @@ -212,14 +212,69 @@ static struct subsys_interface exynos_pm_interface = {
>         .add_dev        = exynos_pm_add,
>  };
>
> +struct exynos_wkup_irq {
> +       unsigned int hwirq;
> +       u32 mask;
> +};
> +
> +static const struct exynos_wkup_irq exynos4_wkup_irq[] = {
> +       { 76, BIT(1) }, /* RTC alarm */
> +       { 77, BIT(2) }, /* RTC tick */
> +       { /* sentinel */ },
> +};
> +
> +static const struct exynos_wkup_irq exynos5250_wkup_irq[] = {
> +       { 75, BIT(1) }, /* RTC alarm */
> +       { 76, BIT(2) }, /* RTC tick */
> +       { /* sentinel */ },
> +};
> +
> +unsigned long s3c_irqwake_intallow;
> +
> +int s3c_irq_wake(struct irq_data *data, unsigned int state)
> +{
> +       const struct exynos_wkup_irq *wkup_irq;
> +
> +       if (soc_is_exynos5250())
> +               wkup_irq = exynos5250_wkup_irq;
> +       else
> +               wkup_irq = exynos4_wkup_irq;
> +
> +       while (wkup_irq->mask) {
> +               if (wkup_irq->hwirq == data->hwirq) {
> +                       if (!state)
> +                               s3c_irqwake_intmask |= wkup_irq->mask;
> +                       else
> +                               s3c_irqwake_intmask &= ~wkup_irq->mask;
> +                       return 0;
> +               }
> +               ++wkup_irq;
> +       }
> +
> +       return -ENOENT;
> +}
> +
>  static __init int exynos_pm_drvinit(void)
>  {
> +       const struct exynos_wkup_irq *wkup_irq;
>         struct clk *pll_base;
>         unsigned int tmp;
>
>         if (soc_is_exynos5440())
>                 return 0;
>
> +       if (soc_is_exynos5250())
> +               wkup_irq = exynos5250_wkup_irq;
> +       else
> +               wkup_irq = exynos4_wkup_irq;
> +
> +       while (wkup_irq->mask) {
> +               s3c_irqwake_intallow |= wkup_irq->mask;
> +               ++wkup_irq;
> +       }
> +
> +       gic_arch_extn.irq_set_wake = s3c_irq_wake;
> +
>         s3c_pm_init();
>
>         /* All wakeup disable */
> --
> 1.8.3.2

Regards,
Abhilash
>
>
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