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sata_rcar: extend PM methods

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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>
This commit is contained in:
Mikhail Ulyanov 2015-01-17 02:00:36 +03:00 committed by Tejun Heo
parent 2de5a9c004
commit 5bc27ef727
1 changed files with 23 additions and 2 deletions
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25
drivers/ata/sata_rcar.c
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@ -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