sata_rcar: extend PM methods

In order to make it possible to restore from hibernation not only in Linux but
also in e.g. U-Boot, we have to extend  sata_rcar_{suspend|resume}() to {freeze|
thaw}() PM  methods and implement  the  restore() PM method.

Signed-off-by: Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
[Sergei: killed unused variable, changed the order of initializers, modified
copyrights, renamed, modified changelog.]
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 23 insertions, 2 deletions

diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index cb0d2e644af5..d49a5193b7de 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -2,8 +2,8 @@
  * Renesas R-Car SATA driver
  *
  * Author: Vladimir Barinov <source@cogentembedded.com>
- * Copyright (C) 2013 Cogent Embedded, Inc.
- * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013-2015 Cogent Embedded, Inc.
+ * Copyright (C) 2013-2015 Renesas Solutions Corp.
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -992,9 +992,30 @@ static int sata_rcar_resume(struct device *dev)
         return 0;
 }
 
+static int sata_rcar_restore(struct device *dev)
+{
+        struct ata_host *host = dev_get_drvdata(dev);
+        struct sata_rcar_priv *priv = host->private_data;
+
+        clk_prepare_enable(priv->clk);
+
+        sata_rcar_setup_port(host);
+
+        /* initialize host controller */
+        sata_rcar_init_controller(host);
+
+        ata_host_resume(host);
+
+        return 0;
+}
+
 static const struct dev_pm_ops sata_rcar_pm_ops = {
         .suspend        = sata_rcar_suspend,
         .resume         = sata_rcar_resume,
+        .freeze         = sata_rcar_suspend,
+        .thaw           = sata_rcar_resume,
+        .poweroff       = sata_rcar_suspend,
+        .restore        = sata_rcar_restore,
 };
 #endif