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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/kernel/i8253.c |
Initial import
Diffstat (limited to 'arch/mips/kernel/i8253.c')
-rw-r--r-- | arch/mips/kernel/i8253.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c new file mode 100644 index 000000000..c5bc344fc --- /dev/null +++ b/arch/mips/kernel/i8253.c @@ -0,0 +1,39 @@ +/* + * i8253.c 8253/PIT functions + * + */ +#include <linux/clockchips.h> +#include <linux/i8253.h> +#include <linux/export.h> +#include <linux/smp.h> +#include <linux/irq.h> + +#include <asm/time.h> + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + i8253_clockevent.event_handler(&i8253_clockevent); + + return IRQ_HANDLED; +} + +static struct irqaction irq0 = { + .handler = timer_interrupt, + .flags = IRQF_NOBALANCING | IRQF_TIMER, + .name = "timer" +}; + +void __init setup_pit_timer(void) +{ + clockevent_i8253_init(true); + setup_irq(0, &irq0); +} + +static int __init init_pit_clocksource(void) +{ + if (num_possible_cpus() > 1) /* PIT does not scale! */ + return 0; + + return clocksource_i8253_init(); +} +arch_initcall(init_pit_clocksource); |