On 23/09/2019 09:58:47-0700, Stephen Boyd wrote:

Quoting Alexandre Belloni (2019-09-20 08:39:06)

quoted

It is not allowed to sleep to early in the boot process and this may lead
to kernel issues if the bootloader didn't prepare the slow clock and main
clock.

This results in the following error and dump stack on the AriettaG25:
   bad: scheduling from the idle thread!

Ensure it is possible to sleep, else simply have a delay.

Reported-by: Uwe Kleine-König <redacted>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---

Note that this was already discussed a while ago and Arnd said this approach was
reasonable:
  https://lore.kernel.org/lkml/6120818.MyeJZ74hYa@wuerfel/ (local)

Does this need a Fixes: tag?

I'm not sure how far this can get backported

Fixes: 80eded6ce8bb ("clk: at91: add slow clks driver")


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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