On Fri, Nov 01, 2024 at 12:50:26PM +0100, Simon Glass wrote: > Rather than doing autoprobe within the driver model code, move it out to > the board-init code. This makes it clear that it is a separate step from > binding devices. > > For now this is always done twice, before and after relocation, but we > should discuss whether it might be possible to drop the post-relocation > probe. > > For boards with SPL, the autoprobe is still done there as well. > > Note that with this change, autoprobe happens after the > EVT_DM_POST_INIT_R/F events are sent, rather than before. > > Update the docs a little, for this feature. > > Signed-off-by: Simon Glass <[email protected]>
This commit is where we need: Link: https://lore.kernel.org/u-boot/[email protected]/ So that it's easy to go from git to fuller history. > diff --git a/doc/develop/driver-model/design.rst > b/doc/develop/driver-model/design.rst > index 8c2c81d7ac9..1dcac1408ff 100644 > --- a/doc/develop/driver-model/design.rst > +++ b/doc/develop/driver-model/design.rst > @@ -842,6 +842,21 @@ steps (see device_probe()): > cause the uclass to do some housekeeping to record the device as > activated and 'known' by the uclass. > > +For some platforms, certain devices must be probed to get the platform into > +a working state. To help with this, drivers marked with > +``DM_FLAG_PROBE_AFTER_BIND`` will be probed immediately after all devices are > +bound. For now, this happens in each xPL build as well as in U-Boot proper, > +both before relocation and after relocation. See the call to > ``dm_autoprobe()`` > +for where this is done. > + > +Note that autoprobe happens after the ``EVT_DM_POST_INIT_R`` and > +``EVT_DM_POST_INIT_F`` events are sent, since these events relate to > +device-binding. > + > +See here for discussion of this feature: > + > +:Link: > https://patchwork.ozlabs.org/project/uboot/patch/[email protected]/ There's 40+ messages in the thread (but I know not all of them were about design), so is the above really a sufficient summary? -- Tom
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