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usb: host: plat: Enable xHCI plat runtime PM

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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>
This commit is contained in:
Baolin Wang 2017-04-19 16:55:45 +03:00 • committed by Greg Kroah-Hartman
parent 21470e32ca
commit b0c69b4bac
1 changed files with 46 additions and 7 deletions
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53
drivers/usb/host/xhci-plat.c
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@ -197,10 +197,16 @@ static int xhci_plat_probe(struct platform_device *pdev)
return ret; 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, hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), NULL); dev_name(&pdev->dev), NULL);
if (!hcd) if (!hcd) {
return -ENOMEM; ret = -ENOMEM;
goto disable_runtime;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, res); 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; goto dealloc_usb2_hcd;
device_enable_async_suspend(&pdev->dev); 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; return 0;
@ -298,6 +311,10 @@ disable_clk:
put_hcd: put_hcd:
usb_put_hcd(hcd); usb_put_hcd(hcd);
disable_runtime:
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return ret; return ret;
} }
@ -319,6 +336,9 @@ static int xhci_plat_remove(struct platform_device *dev)
clk_disable_unprepare(clk); clk_disable_unprepare(clk);
usb_put_hcd(hcd); usb_put_hcd(hcd);
pm_runtime_set_suspended(&dev->dev);
pm_runtime_disable(&dev->dev);
return 0; return 0;
} }
@ -346,14 +366,33 @@ static int xhci_plat_resume(struct device *dev)
return xhci_resume(xhci, 0); 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 = { static const struct dev_pm_ops xhci_plat_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) 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[] = { static const struct acpi_device_id usb_xhci_acpi_match[] = {
/* XHCI-compliant USB Controller */ /* XHCI-compliant USB Controller */
@ -368,7 +407,7 @@ static struct platform_driver usb_xhci_driver = {
.shutdown = usb_hcd_platform_shutdown, .shutdown = usb_hcd_platform_shutdown,
.driver = { .driver = {
.name = "xhci-hcd", .name = "xhci-hcd",
.pm = DEV_PM_OPS, .pm = &xhci_plat_pm_ops,
.of_match_table = of_match_ptr(usb_xhci_of_match), .of_match_table = of_match_ptr(usb_xhci_of_match),
.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
}, },