rp2/modmachine: Re-sync time_ns offset when coming out of lightsleep.

dpgeorge · dpgeorge · commit 120ac0f8d25f · 2024-10-24T23:24:09.000+11:00
Prior to this fix, `tests/extmod/vfs_lfs_mtime.py` would fail when run
after the `tests/ports/rp2/rp2_lightsleep.py` test, because
`time.time_ns()` would have a large and constant offset from `time.time()`.

Fix this by re-syncing the time-ns offset when coming out of lightsleep.

Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/ports/rp2/modmachine.c b/ports/rp2/modmachine.c
@@ -261,6 +261,9 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
     // Bring back all clocks.
     runtime_init_clocks_optional_usb(disable_usb);
     MICROPY_END_ATOMIC_SECTION(my_interrupts);
+
+    // Re-sync mp_hal_time_ns() counter with aon timer.
+    mp_hal_time_ns_set_from_rtc();
 }
 
 NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args) {

Original file line number	Diff line number	Diff line change
`@@ -261,6 +261,9 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {`
`261`	`261`	`// Bring back all clocks.`
`262`	`262`	`runtime_init_clocks_optional_usb(disable_usb);`
`263`	`263`	`MICROPY_END_ATOMIC_SECTION(my_interrupts);`
	`264`	`+`
	`265`	`+ // Re-sync mp_hal_time_ns() counter with aon timer.`
	`266`	`+ mp_hal_time_ns_set_from_rtc();`
`264`	`267`	`}`
`265`	`268`
`266`	`269`	`NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args) {`