diff options
Diffstat (limited to 'lib/utils/timer/fdt_timer_mtimer.c')
| -rw-r--r-- | lib/utils/timer/fdt_timer_mtimer.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/lib/utils/timer/fdt_timer_mtimer.c b/lib/utils/timer/fdt_timer_mtimer.c index e1fd0519..1f29f3a2 100644 --- a/lib/utils/timer/fdt_timer_mtimer.c +++ b/lib/utils/timer/fdt_timer_mtimer.c @@ -39,6 +39,7 @@ static int timer_mtimer_cold_init(const void *fdt, int nodeoff, struct aclint_mtimer_data *mt; const struct timer_mtimer_quirks *quirks = match->data; bool is_clint = quirks && quirks->is_clint; + bool is_ref = false; mtn = sbi_zalloc(sizeof(*mtn)); if (!mtn) @@ -110,13 +111,16 @@ static int timer_mtimer_cold_init(const void *fdt, int nodeoff, } /* - * Select first MTIMER device with no associated HARTs as our - * reference MTIMER device. This is only a temporary strategy - * of selecting reference MTIMER device. In future, we might - * define an optional DT property or some other mechanism to - * help us select the reference MTIMER device. + * If we have a DT property to indicate which MTIMER is the reference, + * select the first MTIMER device that has it. Otherwise, select the + * first MTIMER device with no associated HARTs as our reference. */ - if (!mt->hart_count && !mt_reference) { + if (fdt_getprop(fdt, nodeoff, "riscv,reference-mtimer", NULL)) + is_ref = true; + else if (!mt->hart_count) + is_ref = true; + + if (is_ref && !mt_reference) { mt_reference = mt; /* * Set reference for already propbed MTIMER devices |