Hi,
On Saturday, February 22, 2014 04:53:37 PM Hans de Goede wrote:
> This avoids the ugliness of creating a nested platform device from probe.
>
> While moving it around anyways, move the mk6q phy init code from probe
> to imx_sata_enable, as the phy needs to be re-initialized on resume too,
> otherwise the drive won't be recognized after resume.
>
> Tested on a wandboard i.mx6 quad.
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> .../devicetree/bindings/ata/ahci-platform.txt | 9 +-
> drivers/ata/ahci_imx.c | 331 ++++++++-------------
> 2 files changed, 134 insertions(+), 206 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
> index 499bfed..d86e854 100644
> --- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
> +++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
> @@ -5,8 +5,9 @@ Each SATA controller should have its own node.
>
> Required properties:
> - compatible : compatible list, one of "snps,spear-ahci",
> - "snps,exynos5440-ahci", "ibm,476gtr-ahci", or
> - "allwinner,sun4i-a10-ahci"
> + "snps,exynos5440-ahci", "ibm,476gtr-ahci",
> + "allwinner,sun4i-a10-ahci", "fsl,imx53-ahci" or
> + "fsl,imx6q-ahci"
> - interrupts : <interrupt mapping for SATA IRQ>
> - reg : <registers mapping>
>
> @@ -15,6 +16,10 @@ Optional properties:
> - clocks : a list of phandle + clock specifier pairs
> - target-supply : regulator for SATA target power
>
> +"fsl,imx53-ahci", "fsl,imx6q-ahci" required properties:
> +- clocks : must contain the sata, sata_ref and ahb clocks
> +- clock-names : must contain "ahb" for the ahb clock
> +
> Examples:
> sata@ffe08000 {
> compatible = "snps,spear-ahci";
> diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
> index dd4d6f7..3cb5d69 100644
> --- a/drivers/ata/ahci_imx.c
> +++ b/drivers/ata/ahci_imx.c
[...]
> +static void ahci_imx_host_stop(struct ata_host *host)
> +{
> + struct ahci_host_priv *hpriv = host->private_data;
>
> - ret = platform_device_add_resources(ahci_pdev, res, 2);
> - if (ret)
> - goto err_out;
> + imx_sata_disable(hpriv);
> +}
>
> - ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata));
> - if (ret)
> - goto err_out;
> +static int imx_ahci_suspend(struct device *dev)
> +{
> + struct ata_host *host = dev_get_drvdata(dev);
> + struct ahci_host_priv *hpriv = host->private_data;
> + int ret;
>
> - ret = platform_device_add(ahci_pdev);
> - if (ret) {
> -err_out:
> - platform_device_put(ahci_pdev);
> + ret = ahci_platform_suspend_host(dev);
> + if (ret)
> return ret;
> - }
> +
> + imx_sata_disable(hpriv);
>
> return 0;
> }
>
> -static int imx_ahci_remove(struct platform_device *pdev)
> +static int imx_ahci_resume(struct device *dev)
> {
> - struct imx_ahci_priv *imxpriv = platform_get_drvdata(pdev);
> - struct platform_device *ahci_pdev = imxpriv->ahci_pdev;
> + struct ata_host *host = dev_get_drvdata(dev);
> + struct ahci_host_priv *hpriv = host->private_data;
> + int ret;
>
> - platform_device_unregister(ahci_pdev);
> - return 0;
> + ret = imx_sata_enable(hpriv);
> + if (ret)
> + return ret;
> +
> + return ahci_platform_resume_host(dev);
> }
The code above introduces two new warnings for CONFIG_PM_SLEEP=n:
drivers/ata/ahci_imx.c:284:12: warning: ‘imx_ahci_suspend’ defined but not used [-Wunused-function]
drivers/ata/ahci_imx.c:299:12: warning: ‘imx_ahci_resume’ defined but not used [-Wunused-function]
[ There needs to be CONFIG_PM_SLEEP ifdef around imh_ahci_suspend()
and imx_ahci_resume(). ]
All the rest looks good.
> +static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
> +
> static struct platform_driver imx_ahci_driver = {
> .probe = imx_ahci_probe,
> - .remove = imx_ahci_remove,
> + .remove = ata_platform_remove_one,
> .driver = {
> .name = "ahci-imx",
> .owner = THIS_MODULE,
> .of_match_table = imx_ahci_of_match,
> + .pm = &ahci_imx_pm_ops,
> },
> };
> module_platform_driver(imx_ahci_driver);
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
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