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author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-05-17 10:15:02 +0300 |
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committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-06-20 12:32:38 +0300 |
commit | e9af9229098d92145d0b894b78878bbc6ac7c910 (patch) | |
tree | 34672f39edb0025e7920da4f8bb26056202b9d40 /drivers/usb/dwc3/dwc3-pci.c | |
parent | fc8bb91bc83ef82868533e75f5a11abc1158ec81 (diff) | |
download | linux-e9af9229098d92145d0b894b78878bbc6ac7c910.tar.gz linux-e9af9229098d92145d0b894b78878bbc6ac7c910.tar.bz2 linux-e9af9229098d92145d0b894b78878bbc6ac7c910.zip |
usb: dwc3: pci: add Power Management dummy hooks
Allow for dwc3-pci to reach D3 and enable pm_runtime
by providing dummy PM hooks. Without them, PCI
subsystem won't put device to D3.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3/dwc3-pci.c')
-rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index 14196cd416b3..a7b6a1c8bc81 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -20,6 +20,7 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/pci.h> +#include <linux/pm_runtime.h> #include <linux/platform_device.h> #include <linux/gpio/consumer.h> #include <linux/acpi.h> @@ -180,7 +181,11 @@ static int dwc3_pci_probe(struct pci_dev *pci, goto err; } + device_init_wakeup(dev, true); + device_set_run_wake(dev, true); pci_set_drvdata(pci, dwc3); + pm_runtime_put(dev); + return 0; err: platform_device_put(dwc3); @@ -189,6 +194,8 @@ err: static void dwc3_pci_remove(struct pci_dev *pci) { + device_init_wakeup(&pci->dev, false); + pm_runtime_get(&pci->dev); acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); platform_device_unregister(pci_get_drvdata(pci)); } @@ -219,11 +226,43 @@ static const struct pci_device_id dwc3_pci_id_table[] = { }; MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); +#ifdef CONFIG_PM +static int dwc3_pci_runtime_suspend(struct device *dev) +{ + if (device_run_wake(dev)) + return 0; + + return -EBUSY; +} + +static int dwc3_pci_pm_dummy(struct device *dev) +{ + /* + * There's nothing to do here. No, seriously. Everything is either taken + * care either by PCI subsystem or dwc3/core.c, so we have nothing + * missing here. + * + * So you'd think we didn't need this at all, but PCI subsystem will + * bail out if we don't have a valid callback :-s + */ + return 0; +} +#endif /* CONFIG_PM */ + +static struct dev_pm_ops dwc3_pci_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy) + SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy, + NULL) +}; + static struct pci_driver dwc3_pci_driver = { .name = "dwc3-pci", .id_table = dwc3_pci_id_table, .probe = dwc3_pci_probe, .remove = dwc3_pci_remove, + .driver = { + .pm = &dwc3_pci_dev_pm_ops, + } }; MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |