1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * PCI bus helpers for STMMAC driver 4 * Copyright (C) 2025 Yao Zi <ziyao@disroot.org> 5 */ 6 7 #include <linux/device.h> 8 #include <linux/pci.h> 9 10 #include "stmmac_libpci.h" 11 12 int stmmac_pci_plat_suspend(struct device *dev, void *bsp_priv) 13 { 14 struct pci_dev *pdev = to_pci_dev(dev); 15 int ret; 16 17 ret = pci_save_state(pdev); 18 if (ret) 19 return ret; 20 21 pci_disable_device(pdev); 22 pci_wake_from_d3(pdev, true); 23 24 return 0; 25 } 26 EXPORT_SYMBOL_GPL(stmmac_pci_plat_suspend); 27 28 int stmmac_pci_plat_resume(struct device *dev, void *bsp_priv) 29 { 30 struct pci_dev *pdev = to_pci_dev(dev); 31 int ret; 32 33 pci_restore_state(pdev); 34 pci_set_power_state(pdev, PCI_D0); 35 36 ret = pci_enable_device(pdev); 37 if (ret) 38 return ret; 39 40 pci_set_master(pdev); 41 42 return 0; 43 } 44 EXPORT_SYMBOL_GPL(stmmac_pci_plat_resume); 45 46 MODULE_DESCRIPTION("STMMAC PCI helper library"); 47 MODULE_AUTHOR("Yao Zi <ziyao@disroot.org>"); 48 MODULE_LICENSE("GPL"); 49