xiaoxiang781216 edited a comment on pull request #4191:
URL: https://github.com/apache/incubator-nuttx/pull/4191#issuecomment-883941665
> Seems rather application-specific.
Yes, but it isn't too specific. If the board support A/B boot, something
like BOARDIOC_SWITCH_BOOT is required to commuicate the boot partition from
userspace(OTA subsystem) to board, so it's a common requirement for A/B boot:
1. Download the new image from the sever
2. Write the new image to the alternative partition
3. Call BOARDCTL_SWITCH_BOOT to the alternative system
This is even useful in the single boot partition case, if we want to
implement the reliable update:
1. Download the new image from the sever
2. Call BOARDCTL_SWITCH_BOOT and reboot to a small system
3. Write the new image to the main partition in the small system
4. Call BOARDCTL_SWITCH_BOOT again to the main system
You can see that it's key point to allow updater switch the boot partition
in either case.
> Have you considered the generic BOARDIOC_IOCTL instead?Sent from my Galaxy
Your meaning the system argument for board_switch_boot isn't generic?
```
int board_switch_boot(FAR const char *system);
```
It will be good if you have better suggestion.
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