[PATCH v1 0/4] serdev: Stop using device_driver callbacks

["Uwe Kleine-König" <u.kleine-koenig@baylibre.com>]

Hello,

the serdev subsystem currently doesn't provide a shutdown callback, thus
drivers that want being notified on shutdown have to implement the
respective callback in struct device_driver. This (and more)
functionality can be provided by a bus method as it already done for
.probe() and .remove().

The eventual goal is to remove .shutdown() (and .probe() and .remove())
from struct device_driver.

Note that the first patch introduces a warning when the three affected
drivers are registered (in driver_register() because `drv->bus->shutdown
&& drv->shutdown`). Patches #2 - #4 fix these warnings. So from a user
perspective it would be good to get the whole series in during a single
merge window---either by creating an immutable branch containing patch
#1 that is merged into the respective subsystems before applying the
following patches, or merging the complete series via a single tree.

At a later point in time the added check in
__serdev_device_driver_register() and the function
serdev_legacy_shutdown() can be dropped. I intend to cope for that in
the merge window that removes the callbacks from struct device_driver
because drivers that I might have missed to convert or that are rebased
over that change break silently as long as struct
device_driver::shutdown exists.

Best regards
Uwe

Uwe Kleine-König (4):
  serdev: Provide a bustype shutdown function
  Bluetooth: hci_aml: Migrate to serdev specific shutdown function
  Bluetooth: hci_qca: Migrate to serdev specific shutdown function
  platform/surface: Migrate to serdev specific shutdown function

 drivers/bluetooth/hci_aml.c                | 16 ++++++++--------
 drivers/bluetooth/hci_qca.c                |  5 ++---
 drivers/platform/surface/aggregator/core.c |  6 +++---
 drivers/tty/serdev/core.c                  | 21 +++++++++++++++++++++
 include/linux/serdev.h                     |  1 +
 5 files changed, 35 insertions(+), 14 deletions(-)


base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
-- 
2.47.3