clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspend

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The ARM specifies that the system counter "must be implemented in an
always-on power domain," and so we try to use the counter as a source of
timekeeping across suspend/resume. Unfortunately, some SoCs (e.g.,
Rockchip's RK3399) do not keep the counter ticking properly when
switched from their high-power clock to the lower-power clock used in
system suspend. Support this quirk by adding a new device tree property.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

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Brian Norris 2016-10-04 11:12:09 -07:00 • committed by Daniel Lezcano

parent baa73d9e47

commit d8ec7595a0

2 changed files with 13 additions and 1 deletions

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5

Documentation/devicetree/bindings/arm/arch_timer.txt

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9

drivers/clocksource/arm_arch_timer.c

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