On 08/01/2023 05:13, Laurent Pinchart wrote:
Hi Tomi,
Thank you for the patch.
On Thu, Jan 05, 2023 at 04:03:00PM +0200, Tomi Valkeinen wrote:
From: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx>
An adapter might need to know when a new device is about to be
added. This will soon bee needed to implement an "I2C address
translator" (ATR for short), a device that propagates I2C transactions
with a different slave address (an "alias" address). An ATR driver
needs to know when a slave is being added to find a suitable alias and
program the device translation map.
Add an attach/detach callback pair to allow adapter drivers to be
notified of clients being added and removed.
I've asked in the review of v6 if we could instead use the
BUS_NOTIFY_ADD_DEVICE and BUS_NOTIFY_DEL_DEVICE bus notifiers. There's
been a follow up discussion with Andy, but no reply from you AFAICS.
Have you given this a try ? It's not a mandatory requirement, but if it
can't be done (or shouldn't be done), I'd like to know why.
Sorry, I meant to mention this in the cover letter, but forgot:
I haven't looked at the bus notifiers yet, but will have a look. I
wanted to send a new revision due to the large amount of changes already
done.
Tomi
