On 10/28/21 10:10 PM, Tom Rini wrote:
On Fri, Oct 29, 2021 at 09:28:01AM +0800, Peng Fan (OSS) wrote:
From: Peng Fan <peng....@nxp.com>
Current code has a force clk_set_defaults in multiple stages,
U-Boot reuse the same device tree and Linux Kernel device tree,
but we not register all the clks as Linux Kernel, so clk_set_defaults
will fail and cause the clk provider registeration fail.
So introduce a new property to ignore the default settings which could
be used by any node that wanna ignore default settings.
Reviewed-by: Simon Glass <s...@chromium.org>
Signed-off-by: Peng Fan <peng....@nxp.com>
---
V2:
Add R-b tag
Tom, Simon
After a thought, I think still put it as a u-boot thing. assigned-clock-x is
actually Linux specific, however I could not add the new property to Linux,
because we are supporting SystemReady-IR, we need the assigned-clock-x
property
in linux working and ignore it in U-Boot.
OK, right, so... it should be a generic property to say what, early
firmware should ignore this clock unless otherwise required and use the
preconfigured value?
The issue is that for platforms sharing devicetrees between U-Boot and
Linux, Linux may add assigned-clocks which are not implemented in
U-Boot. Although assigning a specific frequency or parent to a clock may
not be necessary to use the device, it will fail to probe because the
clock cannot be found. I believe this property is intended for these
cases.
--Sean