diff options
Diffstat (limited to 'drivers/rtc/emul_rtc.c')
| -rw-r--r-- | drivers/rtc/emul_rtc.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/drivers/rtc/emul_rtc.c b/drivers/rtc/emul_rtc.c index c98c24bbb3..7e522103fd 100644 --- a/drivers/rtc/emul_rtc.c +++ b/drivers/rtc/emul_rtc.c @@ -8,6 +8,7 @@ #include <common.h> #include <div64.h> #include <dm.h> +#include <env.h> #include <generated/timestamp_autogenerated.h> #include <rtc.h> @@ -30,12 +31,6 @@ static int emul_rtc_get(struct udevice *dev, struct rtc_time *time) struct emul_rtc *priv = dev_get_priv(dev); u64 now; - if (!priv->offset_us) { - /* Use the build date as initial time */ - priv->offset_us = U_BOOT_EPOCH * 1000000ULL - timer_get_us(); - priv->isdst = -1; - } - now = timer_get_us() + priv->offset_us; do_div(now, 1000000); rtc_to_tm(now, time); @@ -63,6 +58,26 @@ static int emul_rtc_set(struct udevice *dev, const struct rtc_time *time) return 0; } +int emul_rtc_probe(struct udevice *dev) +{ + struct emul_rtc *priv = dev_get_priv(dev); + const char *epoch_str; + u64 epoch; + + epoch_str = env_get("rtc_emul_epoch"); + + if (epoch_str) { + epoch = simple_strtoull(epoch_str, NULL, 10); + } else { + /* Use the build date as initial time */ + epoch = U_BOOT_EPOCH; + } + priv->offset_us = epoch * 1000000ULL - timer_get_us(); + priv->isdst = -1; + + return 0; +} + static const struct rtc_ops emul_rtc_ops = { .get = emul_rtc_get, .set = emul_rtc_set, @@ -72,6 +87,7 @@ U_BOOT_DRIVER(rtc_emul) = { .name = "rtc_emul", .id = UCLASS_RTC, .ops = &emul_rtc_ops, + .probe = emul_rtc_probe, .priv_auto_alloc_size = sizeof(struct emul_rtc), }; |