Zepp-Hanzj opened a new pull request, #19514:
URL: https://github.com/apache/nuttx/pull/19514
## Summary
Registering `/dev/rtc0` from `up_rtc_initialize()` creates its
PseudoFS inode before `clock_inittime()` synchronizes
`CLOCK_REALTIME`. As a result, the inode timestamp is zero and
`ls -l /dev` omits the date for `rtc0`.
Keep the RTC lower-half setup in the early initialization path so it
can still provide the system time. Defer registration of the RTC
character device to `up_initialize()`, after clock initialization has
completed.
Fixes #19504.
## Impact
This change only affects the SIM RTC initialization order. The
`/dev/rtc0` inode now receives a valid creation timestamp. RTC time
synchronization and the RTC driver interface are unchanged.
## Testing
Host:
- Ubuntu 20.04.6 LTS under WSL2, x86_64
- Board configuration: `sim:nsh`
The baseline and fixed builds used identical `.config` files, verified
with `cmp`.
Before this change on `master`:
```text
nsh> ls -l /dev
crw------- 0 rtc0
nsh> date
Fri, Jul 24 02:24:43 2026
```
After this change:
```text
nsh> ls -l /dev
crw------- 0 2026-07-24 02:16 rtc0
nsh> date
Fri, Jul 24 02:16:59 2026
```
Additional checks:
- `./tools/checkpatch.sh -f` passes for all modified files.
- `sim:nsh` builds successfully.
- `sim:ostest`, which does not enable RTC support, builds successfully.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
