diff options
| author | Benedikt Spranger <b.spranger@linutronix.de> | 2010-03-06 17:47:10 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2011-11-14 12:10:59 -0500 |
| commit | ca34d5d6a18f8a8e24d6a1fd565d7d4816d93674 (patch) | |
| tree | 85c02a3ce99161ab72fad94172934b6dd4195db4 | |
| parent | 18066292b5036556f167b3f2f98218348b08779a (diff) | |
| download | linux-rt-ca34d5d6a18f8a8e24d6a1fd565d7d4816d93674.tar.gz | |
ARM: AT91: PIT: Remove irq handler when clock event is unused
Setup and remove the interrupt handler in clock event mode selection.
This avoids calling the (shared) interrupt handler when the device is
not used.
Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/arm/mach-at91/at91rm9200_time.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-at91/at91sam926x_time.c | 6 |
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c index 1dd69c85dfec..06665701bebf 100644 --- a/arch/arm/mach-at91/at91rm9200_time.c +++ b/arch/arm/mach-at91/at91rm9200_time.c @@ -114,6 +114,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev) last_crtr = read_CRTR(); switch (mode) { case CLOCK_EVT_MODE_PERIODIC: + setup_irq(AT91_ID_SYS, &at91rm9200_timer_irq); /* PIT for periodic irqs; fixed rate of 1/HZ */ irqmask = AT91_ST_PITS; at91_sys_write(AT91_ST_PIMR, LATCH); @@ -127,6 +128,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev) break; case CLOCK_EVT_MODE_SHUTDOWN: case CLOCK_EVT_MODE_UNUSED: + remove_irq(AT91_ID_SYS, &at91rm9200_timer_irq); case CLOCK_EVT_MODE_RESUME: irqmask = 0; break; diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c index 4ba85499fa97..97d1e1459942 100644 --- a/arch/arm/mach-at91/at91sam926x_time.c +++ b/arch/arm/mach-at91/at91sam926x_time.c @@ -54,7 +54,7 @@ static struct clocksource pit_clk = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; - +static struct irqaction at91sam926x_pit_irq; /* * Clockevent device: interrupts every 1/HZ (== pit_cycles * MCK/16) */ @@ -63,6 +63,9 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) { switch (mode) { case CLOCK_EVT_MODE_PERIODIC: + /* Set up irq handler */ + setup_irq(AT91_ID_SYS, &at91sam926x_pit_irq); + /* update clocksource counter */ pit_cnt += pit_cycle * PIT_PICNT(at91_sys_read(AT91_PIT_PIVR)); at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN @@ -75,6 +78,7 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) case CLOCK_EVT_MODE_UNUSED: /* disable irq, leaving the clocksource active */ at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN); + remove_irq(AT91_ID_SYS, &at91sam926x_pit_irq); break; case CLOCK_EVT_MODE_RESUME: break; |