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Subject[PATCH] sata_fsl: Add power mgmt support
Date
From: Dave Liu <daveliu@freescale.com>

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.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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