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[MIPS] Jazz clockevent driver 

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Ralf Baechle 2007-10-11 23:46:09 +01:00
parent ea5804015c
commit 584d98be3b
2 changed files with 48 additions and 7 deletions
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48
arch/mips/jazz/irq.c
View File

@ -6,6 +6,7 @@
* Copyright (C) 1992 Linus Torvalds
* Copyright (C) 1994 - 2001, 2003 Ralf Baechle
*/
#include <linux/clockchips.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@ -105,3 +106,50 @@ asmlinkage void plat_irq_dispatch(void)
panic("Unimplemented loc_no_irq handler");
}
}
static void r4030_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
/* Nothing to do ... */
}
struct clock_event_device r4030_clockevent = {
.name = "r4030",
.features = CLOCK_EVT_FEAT_PERIODIC,
.rating = 100,
.irq = JAZZ_TIMER_IRQ,
.cpumask = CPU_MASK_CPU0,
.set_mode = r4030_set_mode,
};
static irqreturn_t r4030_timer_interrupt(int irq, void *dev_id)
{
r4030_clockevent.event_handler(&r4030_clockevent);
return IRQ_HANDLED;
}
static struct irqaction r4030_timer_irqaction = {
.handler = r4030_timer_interrupt,
.flags = IRQF_DISABLED,
.mask = CPU_MASK_CPU0,
.name = "timer",
};
void __init plat_timer_setup(struct irqaction *ignored)
{
struct irqaction *irq = &r4030_timer_irqaction;
BUG_ON(HZ != 100);
/*
* Set clock to 100Hz.
*
* The R4030 timer receives an input clock of 1kHz which is divieded by
* a programmable 4-bit divider. This makes it fairly inflexible.
*/
r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
setup_irq(JAZZ_TIMER_IRQ, irq);
clockevents_register_device(&r4030_clockevent);
}

7
arch/mips/jazz/setup.c
View File

@ -39,13 +39,6 @@ extern asmlinkage void jazz_handle_int(void);
extern void jazz_machine_restart(char *command);
void __init plat_timer_setup(struct irqaction *irq)
{
/* set the clock to 100 Hz */
r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
setup_irq(JAZZ_TIMER_IRQ, irq);
}
static struct resource jazz_io_resources[] = {
{
.start = 0x00,