--- /dev/null
+From 041cf8356a4eb91ee8118004b2bc9c78cdd7866c Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Mon, 20 Jan 2014 15:52:07 +0100
+Subject: [PATCH] ahci-platform: "Library-ise" suspend / resume functionality
+
+Split suspend / resume code into host suspend / resume functionality and
+resource enable / disabling phases, and export the new suspend_ / resume_host
+functions.
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/ata/ahci_platform.c | 109 ++++++++++++++++++++++++++++++++++++------
+ include/linux/ahci_platform.h | 5 ++
+ 2 files changed, 99 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 7f3f2ac..bdadec1 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -452,14 +452,26 @@ static void ahci_host_stop(struct ata_host *host)
+ }
+
+ #ifdef CONFIG_PM_SLEEP
+-static int ahci_suspend(struct device *dev)
++/**
++ * ahci_platform_suspend_host - Suspend an ahci-platform host
++ * @dev: device pointer for the host
++ *
++ * This function does all the usual steps needed to suspend an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be disabled after calling this.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_suspend_host(struct device *dev)
+ {
+- struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ void __iomem *mmio = hpriv->mmio;
+ u32 ctl;
+- int rc;
+
+ if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
+ dev_err(dev, "firmware update required for suspend/resume\n");
+@@ -476,7 +488,64 @@ static int ahci_suspend(struct device *dev)
+ writel(ctl, mmio + HOST_CTL);
+ readl(mmio + HOST_CTL); /* flush */
+
+- rc = ata_host_suspend(host, PMSG_SUSPEND);
++ return ata_host_suspend(host, PMSG_SUSPEND);
++}
++EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
++
++/**
++ * ahci_platform_resume_host - Resume an ahci-platform host
++ * @dev: device pointer for the host
++ *
++ * This function does all the usual steps needed to resume an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be initialized / enabled before calling this.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_resume_host(struct device *dev)
++{
++ struct ata_host *host = dev_get_drvdata(dev);
++ int rc;
++
++ if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
++ rc = ahci_reset_controller(host);
++ if (rc)
++ return rc;
++
++ ahci_init_controller(host);
++ }
++
++ ata_host_resume(host);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
++
++/**
++ * ahci_platform_suspend - Suspend an ahci-platform device
++ * @dev: the platform device to suspend
++ *
++ * This function suspends the host associated with the device, followed
++ * by disabling all the resources of the device.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_suspend(struct device *dev)
++{
++ struct ahci_platform_data *pdata = dev_get_platdata(dev);
++ struct ata_host *host = dev_get_drvdata(dev);
++ struct ahci_host_priv *hpriv = host->private_data;
++ int rc;
++
++ rc = ahci_platform_suspend_host(dev);
+ if (rc)
+ return rc;
+
+@@ -487,8 +556,22 @@ static int ahci_suspend(struct device *dev)
+
+ return 0;
+ }
++EXPORT_SYMBOL_GPL(ahci_platform_suspend);
+
+-static int ahci_resume(struct device *dev)
++/**
++ * ahci_platform_resume - Resume an ahci-platform device
++ * @dev: the platform device to resume
++ *
++ * This function enables all the resources of the device followed by
++ * resuming the host associated with the device.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_resume(struct device *dev)
+ {
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+@@ -505,15 +588,9 @@ static int ahci_resume(struct device *dev)
+ goto disable_resources;
+ }
+
+- if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
+- rc = ahci_reset_controller(host);
+- if (rc)
+- goto disable_resources;
+-
+- ahci_init_controller(host);
+- }
+-
+- ata_host_resume(host);
++ rc = ahci_platform_resume_host(dev);
++ if (rc)
++ goto disable_resources;
+
+ return 0;
+
+@@ -522,9 +599,11 @@ static int ahci_resume(struct device *dev)
+
+ return rc;
+ }
++EXPORT_SYMBOL_GPL(ahci_platform_resume);
+ #endif
+
+-static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
++static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
++ ahci_platform_resume);
+
+ static const struct of_device_id ahci_of_match[] = {
+ { .compatible = "snps,spear-ahci", },
+diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
+index b80c51c..542f268 100644
+--- a/include/linux/ahci_platform.h
++++ b/include/linux/ahci_platform.h
+@@ -50,4 +50,9 @@ int ahci_platform_init_host(struct platform_device *pdev,
+ unsigned int force_port_map,
+ unsigned int mask_port_map);
+
++int ahci_platform_suspend_host(struct device *dev);
++int ahci_platform_resume_host(struct device *dev);
++int ahci_platform_suspend(struct device *dev);
++int ahci_platform_resume(struct device *dev);
++
+ #endif /* _AHCI_PLATFORM_H */
+--
+1.8.5.5
+
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