[PATCH v6 08/18] ahci-platform: "Library-ise" suspend / resume functionality
From: Hans de Goede <hidden>
Date: 2014-02-19 12:01:50
Also in:
linux-devicetree, linux-ide
Subsystem:
libata sata ahci platform devices support, libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Hans de Goede, Damien Le Moal, Niklas Cassel, Linus Torvalds
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 <redacted> --- drivers/ata/ahci_platform.c | 55 +++++++++++++++++++++++++++++++------------ include/linux/ahci_platform.h | 5 ++++ 2 files changed, 45 insertions(+), 15 deletions(-)
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index b260ebe..ba93930 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c@@ -353,14 +353,12 @@ static void ahci_host_stop(struct ata_host *host) } #ifdef CONFIG_PM_SLEEP -static int ahci_suspend(struct device *dev) +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");
@@ -377,7 +375,37 @@ 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); + +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); + +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;
@@ -388,8 +416,9 @@ static int ahci_suspend(struct device *dev) return 0; } +EXPORT_SYMBOL_GPL(ahci_platform_suspend); -static int ahci_resume(struct device *dev) +int ahci_platform_resume(struct device *dev) { struct ahci_platform_data *pdata = dev_get_platdata(dev); struct ata_host *host = dev_get_drvdata(dev);
@@ -406,15 +435,9 @@ 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;
@@ -423,9 +446,11 @@ disable_resources: 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 1dc7602..7c683c7 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 */
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1.8.5.3