diff options
Diffstat (limited to 'drivers/clocksource/arm_arch_timer.c')
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 1ecd52f903b8..9ab8221ee3c6 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -880,10 +880,19 @@ static void __arch_timer_setup(unsigned type, clockevents_config_and_register(clk, arch_timer_rate, 0xf, max_delta); } -static void arch_timer_evtstrm_enable(int divider) +static void arch_timer_evtstrm_enable(unsigned int divider) { u32 cntkctl = arch_timer_get_cntkctl(); +#ifdef CONFIG_ARM64 + /* ECV is likely to require a large divider. Use the EVNTIS flag. */ + if (cpus_have_const_cap(ARM64_HAS_ECV) && divider > 15) { + cntkctl |= ARCH_TIMER_EVT_INTERVAL_SCALE; + divider -= 8; + } +#endif + + divider = min(divider, 15U); cntkctl &= ~ARCH_TIMER_EVT_TRIGGER_MASK; /* Set the divider and enable virtual event stream */ cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT) @@ -912,7 +921,7 @@ static void arch_timer_configure_evtstream(void) lsb++; /* enable event stream */ - arch_timer_evtstrm_enable(max(0, min(lsb, 15))); + arch_timer_evtstrm_enable(max(0, lsb)); } static void arch_counter_set_user_access(void) |