linux-kernel - [PATCH v4 2/7] ARM: imx: Add comments to tzic_enable

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Message-Id: <1337135616-8988-3-git-send-email-rob.lee@linaro.org>
Date:	Tue, 15 May 2012 21:33:31 -0500
From:	Robert Lee <rob.lee@...aro.org>
To:	kernel@...gutronix.de
Cc:	shawn.guo@...aro.org, u.kleine-koenig@...gutronix.de,
	richard.zhao@...escale.com, amit.kucheria@...aro.org,
	daniel.lezcano@...aro.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	patches@...aro.org, jj@...osbits.net
Subject: [PATCH v4 2/7] ARM: imx: Add comments to tzic_enable_waker()

Add additional comments to the tzic_enable_wake() funciton to
clarify its intended usage.

Signed-off-by: Robert Lee <rob.lee@...aro.org>
---
 arch/arm/plat-mxc/tzic.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/plat-mxc/tzic.c b/arch/arm/plat-mxc/tzic.c
index 98308ec..a45dbea 100644
--- a/arch/arm/plat-mxc/tzic.c
+++ b/arch/arm/plat-mxc/tzic.c
@@ -190,6 +190,10 @@ void __init tzic_init_irq(void __iomem *irqbase)
  * tzic_enable_wake() - enable wakeup interrupt
  *
  * @return			0 if successful; non-zero otherwise
+ *
+ * This function provides an interrupt synchronization point that is required
+ * by tzic enabled platforms before entering imx specific low power modes (ie,
+ * those low power modes beyond the WAIT_CLOCKED basic ARM WFI only mode).
  */
 int tzic_enable_wake(void)
 {
-- 
1.7.10

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