Patchwork sata_fsl: Add power mgmt support

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Submitter Kumar Gala
Date June 11, 2009, 3:53 a.m.
Message ID <1244692417-18484-1-git-send-email-galak@kernel.crashing.org>
Download mbox | patch
Permalink /patch/28546/
State Accepted
Delegated to: Kumar Gala
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Comments

Kumar Gala - June 11, 2009, 3:53 a.m.
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(-)
Sergei Shtylyov - June 11, 2009, 9:29 a.m.
Hello.

Kumar Gala wrote:

> 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");
>   

   May be "initializing"?

> +		return ret;
> +	}
> +
> +	/* Recovery the CHBA register in host controller cmd register set */
>   

   Maybe "Recover"?

> +	iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
> +
> +	ata_host_resume(host);
> +	return 0;
> +}
> +#endif
>   

MBR, Sergei
Jeff Garzik - June 23, 2009, 5:57 a.m.
Kumar Gala wrote:
> 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(-)

applied

Patch

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)