On Thu, Apr 16, 2026 at 8:28 PM Jakub Kicinski <[email protected]> wrote:
> Remove CAIF (Communication CPU to Application CPU Interface), the
> ST-Ericsson modem protocol. The subsystem has been orphaned since 2013.
> The last meaningful changes from the maintainers were in March 2013:
> a8c7687bf216 ("caif_virtio: Check that vringh_config is not null")
> b2273be8d2df ("caif_virtio: Use vringh_notify_enable correctly")
> 0d2e1a2926b1 ("caif_virtio: Introduce caif over virtio")
>
> Not-so-coincidentally, according to "the Internet" ST-Ericsson officially
> shut down its modem joint venture in Aug 2013.
Reviewed-by: Linus Walleij <[email protected]>
This specific code was used out-of-tree for modems M5730,
M5740 etc used for minor Android phone brands such as Sharp,
Motorola, Philips.
However it is also used in the Samsung Galaxy S 4G, so
let's page [email protected] so the possible
audience knows. PostmarketOS is not actively supporting
it.
I remember that I advised Sjur to use virtio for this project and it lives
on through the generic contributions to virtio that resulted.
Yours,
Linus Walleij
