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clocksource/drivers/sun4i-timer: Only register a sched_clock on sun4i and sun5i

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sun6i and newer have an arm arch timer which is a better
sched_clock source then the sun4i-timer, and sched_clock does
not have priorities, so do not register the sun4i-timer
sched_clock at all on sun6i and newer.

Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Hans de Goede 2015-03-30 22:17:10 +02:00 • committed by Ingo Molnar
commit 37b8b003c4
1 changed files with 9 additions and 1 deletions
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10
drivers/clocksource/sun4i_timer.c
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@ -170,7 +170,15 @@ static void __init sun4i_timer_init(struct device_node *node)
TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
timer_base + TIMER_CTL_REG(1));
sched_clock_register(sun4i_timer_sched_read, 32, rate);
/*
* sched_clock_register does not have priorities, and on sun6i and
* later there is a better sched_clock registered by arm_arch_timer.c
*/
if (of_machine_is_compatible("allwinner,sun4i-a10") ||
of_machine_is_compatible("allwinner,sun5i-a13") ||
of_machine_is_compatible("allwinner,sun5i-a10s"))
sched_clock_register(sun4i_timer_sched_read, 32, rate);
clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name,
rate, 350, 32, clocksource_mmio_readl_down);