[MTD] physmap: add power management support

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Commit:     17c2dae3aaff9b1e5d83996a5f098ad693f3aeca
Parent:     25f0c659fe64832d8ee06aa623fffaad708dcf8b
commit 17c2dae3aaff9b1e5d83996a5f098ad693f3aeca
Author:     Lennert Buytenhek <buytenh at wantstofly.org>
AuthorDate: Thu Sep 21 23:16:48 2006 +0200
Commit:     David Woodhouse <dwmw2 at infradead.org>
CommitDate: Fri Sep 22 10:26:56 2006 +0100

    [MTD] physmap: add power management support
    
    Implement PM handling for physmap.  Idea from Steven Scholz, patch
    by David Anders.
    
    Signed-off-by: Lennert Buytenhek <buytenh at wantstofly.org>
    Signed-off-by: David Woodhouse <dwmw2 at infradead.org>
---
 drivers/mtd/maps/physmap.c |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index 7799a25..bc7cc71 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -158,9 +158,42 @@ err_out:
 	return err;
 }
 
+#ifdef CONFIG_PM
+static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct physmap_flash_info *info = platform_get_drvdata(dev);
+	int ret = 0;
+
+	if (info)
+		ret = info->mtd->suspend(info->mtd);
+
+	return ret;
+}
+
+static int physmap_flash_resume(struct platform_device *dev)
+{
+	struct physmap_flash_info *info = platform_get_drvdata(dev);
+	if (info)
+		info->mtd->resume(info->mtd);
+	return 0;
+}
+
+static void physmap_flash_shutdown(struct platform_device *dev)
+{
+	struct physmap_flash_info *info = platform_get_drvdata(dev);
+	if (info && info->mtd->suspend(info->mtd) == 0)
+		info->mtd->resume(info->mtd);
+}
+#endif
+
 static struct platform_driver physmap_flash_driver = {
 	.probe		= physmap_flash_probe,
 	.remove		= physmap_flash_remove,
+#ifdef CONFIG_PM
+	.suspend	= physmap_flash_suspend,
+	.resume		= physmap_flash_resume,
+	.shutdown	= physmap_flash_shutdown,
+#endif
 	.driver		= {
 		.name	= "physmap-flash",
 	},