linux-kernel - [PATCH] sata_fsl: Add power mgmt support

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Message-Id: <1244692417-18484-1-git-send-email-galak@kernel.crashing.org>
Date:	Wed, 10 Jun 2009 22:53:37 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	jeff@...zik.org
Cc:	linuxppc-dev@...abs.org, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, Dave Liu <daveliu@...escale.com>
Subject: [PATCH] sata_fsl: Add power mgmt support

From: Dave Liu <daveliu@...escale.com>

Signed-off-by: Dave Liu <daveliu@...escale.com>
Signed-off-by: Liu Yu <yu.liu@...escale.com>
Signed-off-by: Kumar Gala <galak@...nel.crashing.org>
---
 drivers/ata/sata_fsl.c |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 36b8629..94eaa43 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1378,6 +1378,37 @@ static int sata_fsl_remove(struct of_device *ofdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int sata_fsl_suspend(struct of_device *op, pm_message_t state)
+{
+	struct ata_host *host = dev_get_drvdata(&op->dev);
+	return ata_host_suspend(host, state);
+}
+
+static int sata_fsl_resume(struct of_device *op)
+{
+	struct ata_host *host = dev_get_drvdata(&op->dev);
+	struct sata_fsl_host_priv *host_priv = host->private_data;
+	int ret;
+	void __iomem *hcr_base = host_priv->hcr_base;
+	struct ata_port *ap = host->ports[0];
+	struct sata_fsl_port_priv *pp = ap->private_data;
+
+	ret = sata_fsl_init_controller(host);
+	if (ret) {
+		dev_printk(KERN_ERR, &op->dev,
+			"Error initialize hardware\n");
+		return ret;
+	}
+
+	/* Recovery the CHBA register in host controller cmd register set */
+	iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
+
+	ata_host_resume(host);
+	return 0;
+}
+#endif
+
 static struct of_device_id fsl_sata_match[] = {
 	{
 		.compatible = "fsl,pq-sata",
@@ -1392,6 +1423,10 @@ static struct of_platform_driver fsl_sata_driver = {
 	.match_table	= fsl_sata_match,
 	.probe		= sata_fsl_probe,
 	.remove		= sata_fsl_remove,
+#ifdef CONFIG_PM
+	.suspend	= sata_fsl_suspend,
+	.resume		= sata_fsl_resume,
+#endif
 };
 
 static int __init sata_fsl_init(void)
-- 
1.6.0.6

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