• Grant Likely's avatar
    of: Reorder device tree changes and notifiers · 259092a3
    Grant Likely authored
    Currently, devicetree reconfig notifiers get emitted before the change
    is applied to the tree, but that behaviour is problematic if the
    receiver wants the determine the new state of the tree. The current
    users don't care, but the changeset code to follow will be making
    multiple changes at once. Reorder notifiers to get emitted after the
    change has been applied to the tree so that callbacks see the new tree
    state.
    
    At the same time, fixup the existing callbacks to expect the new order.
    There are a few callbacks that compare the old and new values of a
    changed property. Put both property pointers into the of_prop_reconfig
    structure.
    
    The current notifiers also allow the notifier callback to fail and
    cancel the change to the tree, but that feature isn't actually used.
    It really isn't valid to ignore a tree modification provided by firmware
    anyway, so remove the ability to cancel a change to the tree.
    Signed-off-by: default avatarGrant Likely <grant.likely@linaro.org>
    Cc: Nathan Fontenot <nfont@austin.ibm.com>
    259092a3
nx-842.c 43.5 KB