Ulf Hansson 031dcc9bd4
clk: Fixup errorhandling for clk_set_parent ...
Fixup the broken feature of allowing reparent of a clk to the
orhpan list and vice verse. When operating on a single-parent
clk, the .set_parent callback for the clk hw is optional to
implement, but for a multi-parent clk it is mandatory.
Moreover improve the errorhandling by verifying the prerequisites
before triggering clk notifiers. This will prevent unnecessary
rollback with ABORT_RATE_CHANGE.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org >
Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org >
Signed-off-by: Mike Turquette <mturquette@linaro.org >
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031dcc9bd4