bus: ti-sysc: Fix gpt12 system timer issue with reserved status

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[ Upstream commit 3ff340e24c ]

Jarkko Nikula <jarkko.nikula@bitmer.com> reported that Beagleboard
revision c2 stopped booting. Jarkko bisected the issue down to
commit 6cfcd5563b ("clocksource/drivers/timer-ti-dm: Fix suspend
and resume for am3 and am4").

Let's fix the issue by tagging system timers as reserved rather than
ignoring them. And let's not probe any interconnect target module child
devices for reserved modules.

This allows PM runtime to keep track of clocks and clockdomains for
the interconnect target module, and prevent the system timer from idling
as we already have SYSC_QUIRK_NO_IDLE and SYSC_QUIRK_NO_IDLE_ON_INIT
flags set for system timers.

Fixes: 6cfcd5563b ("clocksource/drivers/timer-ti-dm: Fix suspend and resume for am3 and am4")
Reported-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Tested-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Tony Lindgren 2021-06-11 08:42:50 +03:00 • committed by Greg Kroah-Hartman

parent e32a291736

commit 8efe3a635f

1 changed files with 13 additions and 7 deletions

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drivers/bus/ti-sysc.c

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