diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 2133f9d59d06..6a79fc4f900c 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -462,7 +462,10 @@ static void __init arch_counter_register(unsigned type) /* Register the CP15 based counter if we have one */ if (type & ARCH_CP15_TIMER) { - arch_timer_read_counter = arch_counter_get_cntvct; + if (arch_timer_use_virtual) + arch_timer_read_counter = arch_counter_get_cntvct; + else + arch_timer_read_counter = arch_counter_get_cntpct; } else { arch_timer_read_counter = arch_counter_get_cntvct_mem; @@ -660,11 +663,11 @@ static bool __init arch_timer_probed(int type, const struct of_device_id *matches) { struct device_node *dn; - bool probed = false; + bool probed = true; dn = of_find_matching_node(NULL, matches); - if (dn && of_device_is_available(dn) && (arch_timers_present & type)) - probed = true; + if (dn && of_device_is_available(dn) && !(arch_timers_present & type)) + probed = false; of_node_put(dn); return probed; @@ -702,6 +705,14 @@ static void __init arch_timer_init(struct device_node *np) arch_timer_detect_rate(NULL, np); /* + * If we cannot rely on firmware initializing the timer registers then + * we should use the physical timers instead. + */ + if (IS_ENABLED(CONFIG_ARM) && + of_property_read_bool(np, "arm,cpu-registers-not-fw-configured")) + arch_timer_use_virtual = false; + + /* * If HYP mode is available, we know that the physical timer * has been configured to be accessible from PL1. Use it, so * that a guest can use the virtual timer instead. |