static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct ttc_timer *ttc = to_ttc_timer(nb);
struct ttc_timer_clockevent *ttcce = container_of(ttc,
struct ttc_timer_clockevent, ttc);
switch (event) {
case POST_RATE_CHANGE:
{
unsigned long flags;
/*
* clockevents_update_freq should be called with IRQ disabled on
* the CPU the timer provides events for. The timer we use is
* common to both CPUs, not sure if we need to run on both
* cores.
*/
local_irq_save(flags);
clockevents_update_freq(&ttcce->ce,
ndata->new_rate / PRESCALE);
local_irq_restore(flags);
/* fall through */
}
case PRE_RATE_CHANGE:
case ABORT_RATE_CHANGE:
default:
return NOTIFY_DONE;
}
}
static int sun5i_rate_cb_clkevt(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct sun5i_timer *timer = to_sun5i_timer(nb);
struct sun5i_timer_clkevt *ce = container_of(timer, struct sun5i_timer_clkevt, timer);
if (event == POST_RATE_CHANGE) {
clockevents_update_freq(&ce->clkevt, ndata->new_rate);
ce->timer.ticks_per_jiffy = DIV_ROUND_UP(ndata->new_rate, HZ);
}
return NOTIFY_DONE;
}
static void gt_clockevent_update_freq(void *info)
{
unsigned long *clk_rate = info;
clockevents_update_freq(this_cpu_ptr(gt_evt), *clk_rate);
}
/*
* Updates clockevent frequency when the cpu frequency changes.
* Called on the cpu that is changing frequency with interrupts disabled.
*/
static void twd_update_frequency(void *data)
{
twd_timer_rate = clk_get_rate(twd_clk);
clockevents_update_freq(*__this_cpu_ptr(twd_evt), twd_timer_rate);
}
/*
* Updates clockevent frequency when the cpu frequency changes.
* Called on the cpu that is changing frequency with interrupts disabled.
*/
static void twd_update_frequency(void *data)
{
twd_timer_rate = clk_get_rate(twd_clk);
clockevents_update_freq(__get_cpu_var(twd_ce), twd_timer_rate);
}
/*
* Updates clockevent frequency when the cpu frequency changes.
* Called on the cpu that is changing frequency with interrupts disabled.
*/
static void twd_update_frequency(void *new_rate)
{
twd_timer_rate = *((unsigned long *) new_rate);
clockevents_update_freq(*__this_cpu_ptr(twd_evt), twd_timer_rate);
}
static void gic_update_frequency(void *data)
{
unsigned long rate = (unsigned long)data;
clockevents_update_freq(this_cpu_ptr(&gic_clockevent_device), rate);
}