Commit 81759360 authored Oct 02, 2018 by Anton Blanchard Committed by Michael Ellerman Oct 04, 2018

powerpc/time: Add set_state_oneshot_stopped decrementer callback



If CONFIG_PPC_WATCHDOG is enabled we always cap the decrementer to
0x7fffffff:

       if (IS_ENABLED(CONFIG_PPC_WATCHDOG))
                set_dec(0x7fffffff);
        else
                set_dec(decrementer_max);

If there are no future events, we don't reprogram the decrementer
after this and we end up with 0x7fffffff even on a large decrementer
capable system.

As suggested by Nick, add a set_state_oneshot_stopped callback
so we program the decrementer with decrementer_max if there are
no future events.

Signed-off-by: Anton Blanchard <anton@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 8b78fdb0

arch/powerpc/kernel/time.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -111,6 +111,7 @@ struct clock_event_device decrementer_clockevent = {
	.rating = 200,		.rating = 200,
	.irq = 0,		.irq = 0,
	.set_next_event = decrementer_set_next_event,		.set_next_event = decrementer_set_next_event,
			.set_state_oneshot_stopped = decrementer_shutdown,
	.set_state_shutdown = decrementer_shutdown,		.set_state_shutdown = decrementer_shutdown,
	.tick_resume = decrementer_shutdown,		.tick_resume = decrementer_shutdown,
	.features = CLOCK_EVT_FEAT_ONESHOT \|		.features = CLOCK_EVT_FEAT_ONESHOT \|