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authorBaolin Wang <baolin.wang@linaro.org>2017-04-19 16:55:45 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-04-19 19:59:16 +0200
commitb0c69b4bace3703a29e08dda2b5a10e1073cb9cd (patch)
treefa90faddd1559ccee248c84dbdbab19bdf8cc141 /drivers/usb/host/xhci-plat.c
parent21470e32ca7f976bf131aa3c7b54019d07f7d821 (diff)
usb: host: plat: Enable xHCI plat runtime PM
Enable the xHCI plat runtime PM for parent device to suspend/resume xHCI. Also call pm_runtime_forbid() in probe() function to force users to explicitly enable runtime pm using power/control in sysfs, in case some parent devices didn't implement runtime PM callbacks. [set do_wakeup to true when runtime suspending -Mathias] Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-plat.c')
-rw-r--r--drivers/usb/host/xhci-plat.c53
1 files changed, 46 insertions, 7 deletions
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 62e71b8a8b55..60aeaca5b1dc 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -197,10 +197,16 @@ static int xhci_plat_probe(struct platform_device *pdev)
return ret;
}
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_noresume(&pdev->dev);
+
hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), NULL);
- if (!hcd)
- return -ENOMEM;
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto disable_runtime;
+ }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
@@ -278,6 +284,13 @@ static int xhci_plat_probe(struct platform_device *pdev)
goto dealloc_usb2_hcd;
device_enable_async_suspend(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
+ /*
+ * Prevent runtime pm from being on as default, users should enable
+ * runtime pm using power/control in sysfs.
+ */
+ pm_runtime_forbid(&pdev->dev);
return 0;
@@ -298,6 +311,10 @@ disable_clk:
put_hcd:
usb_put_hcd(hcd);
+disable_runtime:
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
return ret;
}
@@ -319,6 +336,9 @@ static int xhci_plat_remove(struct platform_device *dev)
clk_disable_unprepare(clk);
usb_put_hcd(hcd);
+ pm_runtime_set_suspended(&dev->dev);
+ pm_runtime_disable(&dev->dev);
+
return 0;
}
@@ -346,14 +366,33 @@ static int xhci_plat_resume(struct device *dev)
return xhci_resume(xhci, 0);
}
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM
+static int xhci_plat_runtime_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_suspend(xhci, true);
+}
+
+static int xhci_plat_runtime_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_resume(xhci, 0);
+}
+#endif /* CONFIG_PM */
static const struct dev_pm_ops xhci_plat_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
+
+ SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
+ xhci_plat_runtime_resume,
+ NULL)
};
-#define DEV_PM_OPS (&xhci_plat_pm_ops)
-#else
-#define DEV_PM_OPS NULL
-#endif /* CONFIG_PM */
static const struct acpi_device_id usb_xhci_acpi_match[] = {
/* XHCI-compliant USB Controller */
@@ -368,7 +407,7 @@ static struct platform_driver usb_xhci_driver = {
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "xhci-hcd",
- .pm = DEV_PM_OPS,
+ .pm = &xhci_plat_pm_ops,
.of_match_table = of_match_ptr(usb_xhci_of_match),
.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
},