From: Stefan Agner <stefan@agner.ch>
Date: Sun, 28 Sep 2014 23:50:05 +0000 (+0200)
Subject: clocksource: vf_pit_timer: Support shutdown mode
X-Git-Tag: firefly_0821_release~176^2~3104^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=04f7e3e5134b9517bd9a78a84a9ee0f982d3ebdd;p=firefly-linux-kernel-4.4.55.git

clocksource: vf_pit_timer: Support shutdown mode

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@agner.ch>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
---

diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index a918bc481c52..b45ac6229b57 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;
 	}