Re: [PATCH 0/4] clk: mvebu: fix clk init order
From: Jason Cooper
Date: Wed Feb 05 2014 - 12:43:38 EST
On Wed, Feb 05, 2014 at 06:08:02AM -0800, Mike Turquette wrote:
> Quoting Sebastian Hesselbarth (2014-01-25 10:19:06)
> > This patch set fixes clk init order that went upside-down with
> > v3.14. I haven't really investigated what caused this, but I assume
> > it is related with DT node reordering by addresses.
> >
> > Anyway, with v3.14 for MVEBU SoCs, the clock gating driver gets
> > registered before core clocks driver. Unfortunately, we cannot
> > return -EPROBE_DEFER in drivers initialized by clk_of_init. As the
> > init order for our drivers is always core clocks before clock gating,
> > we maintain init order ourselves by hooking CLK_OF_DECLARE to one
> > init function that will register core clocks before clock gating
> > driver.
> >
> > This patch is based on pre-v3.14-rc1 mainline and should go in as
> > fixes for it. As we now send MVEBU clk pull-requests to Mike directly,
> > I suggest Jason picks it up as a topic branch.
>
> Sebastian,
>
> These patches look OK to me. I'd rather take Gregory Clement's "respect
> the clock dependencies in of_clk_init" patch towards 3.15, so this fix
> will still be necessary for the current -rc's.
>
> Jason, will you be sending a PR?
Ahh, just saw this now. ignore my previous comments about using
Gregory's series as the fix.
Sure, I'll put this together for a pr to the clk tree.
thx,
Jason.
> > The patches have been boot tested on Dove and compile-tested only
> > for Kirkwood, Armada 370 and XP.
> >
> > Sebastian Hesselbarth (4):
> > clk: mvebu: armada-370: maintain clock init order
> > clk: mvebu: armada-xp: maintain clock init order
> > clk: mvebu: dove: maintain clock init order
> > clk: mvebu: kirkwood: maintain clock init order
> >
> > drivers/clk/mvebu/armada-370.c | 21 ++++++++++-----------
> > drivers/clk/mvebu/armada-xp.c | 20 +++++++++-----------
> > drivers/clk/mvebu/dove.c | 19 +++++++++----------
> > drivers/clk/mvebu/kirkwood.c | 34 ++++++++++++++++------------------
> > 4 files changed, 44 insertions(+), 50 deletions(-)
> >
> > ---
> > Cc: Mike Turquette <mturquette@xxxxxxxxxx>
> > Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
> > Cc: Andrew Lunn <andrew@xxxxxxx>
> > Cc: Gregory Clement <gregory.clement@xxxxxxxxxxxxxxxxxx>
> > Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
> > Cc: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > --
> > 1.8.5.2
> >
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