From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 2 Apr 2013 21:09:38 +0000 (+0200)
Subject: clk: Fixup errorhandling for clk_set_parent
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~129^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=031dcc9bd4164a7482b89987d5b9ecb3af5e9033;p=pandora-kernel.git

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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