linux-kernel - [PATCH 3/4] arm: gpmc: Low power transition support

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Message-ID: <1358934346-16822-4-git-send-email-avinashphilip@ti.com>
Date:	Wed, 23 Jan 2013 15:15:45 +0530
From:	Philip Avinash <avinashphilip@...com>
To:	<khilman@...com>, <tony@...mide.com>, <linux@....linux.org.uk>,
	<dwmw2@...radead.org>
CC:	<afzal@...com>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
	<nsekhar@...com>, <gururaja.hebbar@...com>,
	Philip Avinash <avinashphilip@...com>
Subject: [PATCH 3/4] arm: gpmc: Low power transition support

With GPMC converted to platform driver recently, adds low power
transition support in driver itself.

Signed-off-by: Philip Avinash <avinashphilip@...com>
---
 arch/arm/mach-omap2/gpmc.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index aed958a..af10617 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -1357,9 +1357,29 @@ static __devexit int gpmc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int gpmc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	omap3_gpmc_save_context();
+	clk_disable_unprepare(gpmc_l3_clk);
+	return 0;
+}
+
+static int gpmc_resume(struct platform_device *pdev)
+{
+	clk_prepare_enable(gpmc_l3_clk);
+	omap3_gpmc_restore_context();
+	return 0;
+}
+#endif
+
 static struct platform_driver gpmc_driver = {
 	.probe		= gpmc_probe,
 	.remove		= __devexit_p(gpmc_remove),
+#ifdef CONFIG_PM
+	.suspend	= gpmc_suspend,
+	.resume		= gpmc_resume,
+#endif
 	.driver		= {
 		.name	= DEVICE_NAME,
 		.owner	= THIS_MODULE,
-- 
1.7.9.5

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