From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753990AbaIXQUY (ORCPT ); Wed, 24 Sep 2014 12:20:24 -0400 Received: from mail.kmu-office.ch ([178.209.48.102]:40445 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751577AbaIXQUT (ORCPT ); Wed, 24 Sep 2014 12:20:19 -0400 From: Stefan Agner To: shawn.guo@freescale.com, kernel@pengutronix.de, daniel.lezcano@linaro.org, tglx@linutronix.de Cc: festevam@gmail.com, jingchang.lu@freescale.com, bpringlemeir@nbsps.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH v2 1/3] clocksource: vf_pit_timer: Support shutdown mode Date: Wed, 24 Sep 2014 18:20:08 +0200 Message-Id: <1411575610-20895-2-git-send-email-stefan@agner.ch> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1411575610-20895-1-git-send-email-stefan@agner.ch> References: <1411575610-20895-1-git-send-email-stefan@agner.ch> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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