linux-kernel - [PATCH 4/4] mtd: nand: omap2: Low power transition support

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Date:	Wed, 23 Jan 2013 15:15:46 +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 4/4] mtd: nand: omap2: Low power transition support

Add support for Low power transition support in nand driver. Also
ensures the current transaction finishes before going to low power mode
with _suspend support in mtd layer.

Signed-off-by: Philip Avinash <avinashphilip@...com>
---
 drivers/mtd/nand/omap2.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 8e820dd..790215b 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -2103,9 +2103,28 @@ static int omap_nand_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int omap_nand_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct mtd_info *mtd = platform_get_drvdata(pdev);
+
+	mtd->_suspend(mtd);
+	return 0;
+}
+
+static int omap_nand_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+#endif
+
 static struct platform_driver omap_nand_driver = {
 	.probe		= omap_nand_probe,
 	.remove		= omap_nand_remove,
+#ifdef CONFIG_PM
+	.suspend	= omap_nand_suspend,
+	.resume		= omap_nand_resume,
+#endif
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.owner	= THIS_MODULE,
-- 
1.7.9.5

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