From: stefan@agner.ch (Stefan Agner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/3] clocksource: vf_pit_timer: Support shutdown mode
Date: Wed, 24 Sep 2014 18:20:08 +0200 [thread overview]
Message-ID: <1411575610-20895-2-git-send-email-stefan@agner.ch> (raw)
In-Reply-To: <1411575610-20895-1-git-send-email-stefan@agner.ch>
In order to avoid waking up the system in a low power mode, the
clocksource should not generate interrupts anymore. Disable the PIT
timer interrupt when changing into the CLOCK_EVT_MODE_SHUTDOWN mode.
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
drivers/clocksource/vf_pit_timer.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index a918bc4..eb354b4 100644
--- a/drivers/clocksource/vf_pit_timer.c
+++ b/drivers/clocksource/vf_pit_timer.c
@@ -89,10 +89,15 @@ static int pit_set_next_event(unsigned long delta,
static void pit_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
+
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
pit_set_next_event(cycle_per_jiffy, evt);
break;
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_UNUSED:
+ pit_timer_disable();
+ break;
default:
break;
}
--
2.1.0
next prev parent reply other threads:[~2014-09-24 16:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-24 16:20 [PATCH v2 0/3] ARM: vf610: Fix/add clocksource Stefan Agner
2014-09-24 16:20 ` Stefan Agner [this message]
2014-09-25 12:19 ` [PATCH v2 1/3] clocksource: vf_pit_timer: Support shutdown mode Sergei Shtylyov
2014-09-24 16:20 ` [PATCH v2 2/3] ARM: dts: vf610: Add ARM Global Timer Stefan Agner
2014-09-26 1:41 ` Shawn Guo
2014-09-24 16:20 ` [PATCH v2 3/3] ARM: vf610: Add ARM Global Timer clocksource option Stefan Agner
2014-09-26 1:45 ` Shawn Guo
2014-09-29 11:51 ` Shawn Guo
2014-09-29 12:18 ` Stefan Agner
2014-09-24 17:06 ` [PATCH v2 0/3] ARM: vf610: Fix/add clocksource Bill Pringlemeir
2014-09-26 7:01 ` Daniel Lezcano
2014-09-26 7:24 ` Stefan Agner
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