linux-kernel - [PATCH 5/5] ARM: tegra: cpuidle: use firmware call for power down

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Date:	Tue, 21 Jan 2014 19:10:16 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Russell King <linux@....linux.org.uk>
CC:	Olof Johansson <olof@...om.net>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<gnurou@...il.com>, Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH 5/5] ARM: tegra: cpuidle: use firmware call for power down

Invoke the do_idle() firmware call before suspending a CPU so that the
underlying firmware (if any) can take necessary action.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 arch/arm/mach-tegra/cpuidle-tegra114.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
index e0b87300243d..c42fd41065d2 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra114.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -19,6 +19,7 @@
 #include <linux/cpuidle.h>
 #include <linux/cpu_pm.h>
 #include <linux/clockchips.h>
+#include <asm/firmware.h>
 
 #include <asm/cpuidle.h>
 #include <asm/suspend.h>
@@ -45,6 +46,8 @@ static int tegra114_idle_power_down(struct cpuidle_device *dev,
 
 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);
 
+	call_firmware_op(do_idle);
+
 	cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
 
 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
-- 
1.8.5.3

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