diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-pci.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index 54343fbd85ee..3ba11136ebf0 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /** * dwc3-pci.c - PCI Specific glue layer * @@ -5,21 +6,13 @@ * * Authors: Felipe Balbi <balbi@ti.com>, * Sebastian Andrzej Siewior <bigeasy@linutronix.de> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 of - * the License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/pci.h> +#include <linux/workqueue.h> #include <linux/pm_runtime.h> #include <linux/platform_device.h> #include <linux/gpio/consumer.h> @@ -61,6 +54,7 @@ struct dwc3_pci { guid_t guid; unsigned int has_dsm_for_pm:1; + struct work_struct wakeup_work; }; static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; @@ -174,6 +168,22 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc) return 0; } +#ifdef CONFIG_PM +static void dwc3_pci_resume_work(struct work_struct *work) +{ + struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work); + struct platform_device *dwc3 = dwc->dwc3; + int ret; + + ret = pm_runtime_get_sync(&dwc3->dev); + if (ret) + return; + + pm_runtime_mark_last_busy(&dwc3->dev); + pm_runtime_put_sync_autosuspend(&dwc3->dev); +} +#endif + static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) { @@ -232,6 +242,9 @@ static int dwc3_pci_probe(struct pci_dev *pci, device_init_wakeup(dev, true); pci_set_drvdata(pci, dwc); pm_runtime_put(dev); +#ifdef CONFIG_PM + INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work); +#endif return 0; err: @@ -243,6 +256,9 @@ static void dwc3_pci_remove(struct pci_dev *pci) { struct dwc3_pci *dwc = pci_get_drvdata(pci); +#ifdef CONFIG_PM + cancel_work_sync(&dwc->wakeup_work); +#endif device_init_wakeup(&pci->dev, false); pm_runtime_get(&pci->dev); platform_device_unregister(dwc->dwc3); @@ -318,14 +334,15 @@ static int dwc3_pci_runtime_suspend(struct device *dev) static int dwc3_pci_runtime_resume(struct device *dev) { struct dwc3_pci *dwc = dev_get_drvdata(dev); - struct platform_device *dwc3 = dwc->dwc3; int ret; ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); if (ret) return ret; - return pm_runtime_get(&dwc3->dev); + queue_work(pm_wq, &dwc->wakeup_work); + + return 0; } #endif /* CONFIG_PM */ |