linux-kernel - [PATCH 06/13] clocksource: vf_pit

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Date:	Mon, 29 Sep 2014 02:23:39 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	tglx@...utronix.de, mingo@...nel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 06/13] clocksource: vf_pit_timer: Support shutdown mode

From: Stefan Agner <stefan@...er.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.

[dlezcano] : remove superfluous empty line

Signed-off-by: Stefan Agner <stefan@...er.ch>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Acked-by: Bill Pringlemeir <bpringlemeir@...ps.com>
---
 drivers/clocksource/vf_pit_timer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index a918bc4..b45ac62 100644
--- a/drivers/clocksource/vf_pit_timer.c
+++ b/drivers/clocksource/vf_pit_timer.c
@@ -93,6 +93,10 @@ static void pit_set_mode(enum clock_event_mode 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;
 	}
-- 
1.9.1

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