Hi Marek, On Sun, 26 Apr 2020 at 04:52, Marek Vasut <[email protected]> wrote: > > Add another flag to the DM core which could be assigned to drivers and > which makes those drivers call their remove callbacks last, just before > booting OS and after all the other drivers finished with their remove > callbacks. This is necessary for things like clock drivers, where the > other drivers might depend on the clock driver in their remove callbacks. > Prime example is the mmc subsystem, which can reconfigure a card from HS > mode to slower modes in the remove callback and for that it needs to > reconfigure the controller clock. > > Signed-off-by: Marek Vasut <[email protected]> > Cc: Simon Glass <[email protected]> > Cc: Tom Rini <[email protected]> > --- > arch/arm/lib/bootm.c | 1 + > drivers/core/device-remove.c | 11 ++++++++--- > drivers/core/root.c | 2 ++ > include/dm/device.h | 4 ++++ > 4 files changed, 15 insertions(+), 3 deletions(-)
I think this solution is simpler than trying to track device dependencies, something that driver model currently makes no attempt to do. It does need a test though. Regards, Simon
