[PATCH 10/10] ARM: imx6q: implement WAIT mode with coupled cpuidle

[Lorenzo Pieralisi]

On Tue, Oct 23, 2012 at 04:22:59PM +0100, Shawn Guo wrote:

[...]

> +/*
> + * For each cpu, setup the broadcast timer because local timer
> + * stops for the states other than WFI.
> + */
> +static void imx6q_setup_broadcast_timer(void *arg)
> +{
> +       int cpu = smp_processor_id();
> +
> +       clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ON, &cpu);
> +}

Can anyone explain to me please why this is needed ?

Is this snippet not enough ? If not why ?

clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);

[cpu sleep - power down]

clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu);

Thanks,
Lorenzo