diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0115-ahci-platform-Library-ise-suspend-resume-functionali.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0115-ahci-platform-Library-ise-suspend-resume-functionali.patch | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0115-ahci-platform-Library-ise-suspend-resume-functionali.patch b/target/linux/ipq806x/patches/0115-ahci-platform-Library-ise-suspend-resume-functionali.patch new file mode 100644 index 0000000000..9a9cb074e8 --- /dev/null +++ b/target/linux/ipq806x/patches/0115-ahci-platform-Library-ise-suspend-resume-functionali.patch @@ -0,0 +1,180 @@ +From 8121ed9c7ea2d56f5e0a98c2db396214f85d7485 Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Sat, 22 Feb 2014 16:53:35 +0100 +Subject: [PATCH 115/182] 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. + +tj: Minor comment formatting updates. + +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +Signed-off-by: Tejun Heo <tj@kernel.org> +--- + drivers/ata/ahci_platform.c | 97 ++++++++++++++++++++++++++++++++++------- + include/linux/ahci_platform.h | 5 +++ + 2 files changed, 87 insertions(+), 15 deletions(-) + +diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c +index 19e9eaa..01f7bbe 100644 +--- a/drivers/ata/ahci_platform.c ++++ b/drivers/ata/ahci_platform.c +@@ -432,14 +432,23 @@ 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. ++ * ++ * 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"); +@@ -456,7 +465,58 @@ 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. ++ * ++ * 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. ++ * ++ * 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; + +@@ -467,8 +527,19 @@ 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. ++ * ++ * 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); +@@ -485,15 +556,9 @@ 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; + +@@ -502,9 +567,11 @@ 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 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 */ +-- +1.7.10.4 + |