Commit 4440bf5f authored by Yao Zi's avatar Yao Zi Committed by Jakub Kicinski
Browse files

net: stmmac: Add generic suspend/resume helper for PCI-based controllers 



Most glue driver for PCI-based DWMAC controllers utilize similar
platform suspend/resume routines. Add a generic implementation to reduce
duplicated code.

Signed-off-by: default avatarYao Zi <ziyao@disroot.org>
Reviewed-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: default avatarYanteng Si <siyanteng@cqsoftware.com.cn>
Link: https://patch.msgid.link/20251124160417.51514-2-ziyao@disroot.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent fdaf715b

drivers/net/ethernet/stmicro/stmmac/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -349,6 +349,11 @@ config DWMAC_VISCONTI 


endif



config STMMAC_LIBPCI

	tristate

	help

	  This option enables the PCI bus helpers for the stmmac driver.



config DWMAC_INTEL

	tristate "Intel GMAC support"

	default X86

drivers/net/ethernet/stmicro/stmmac/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ obj-$(CONFIG_DWMAC_VISCONTI) += dwmac-visconti.o 
stmmac-platform-objs:= stmmac_platform.o

dwmac-altr-socfpga-objs := dwmac-socfpga.o



obj-$(CONFIG_STMMAC_LIBPCI)	+= stmmac_libpci.o

obj-$(CONFIG_STMMAC_PCI)	+= stmmac-pci.o

obj-$(CONFIG_DWMAC_INTEL)	+= dwmac-intel.o

obj-$(CONFIG_DWMAC_LOONGSON)	+= dwmac-loongson.o

drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c

0 → 100644
+48 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * PCI bus helpers for STMMAC driver

 * Copyright (C) 2025 Yao Zi <ziyao@disroot.org>

 */



#include <linux/device.h>

#include <linux/pci.h>



#include "stmmac_libpci.h"



int stmmac_pci_plat_suspend(struct device *dev, void *bsp_priv)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	int ret;



	ret = pci_save_state(pdev);

	if (ret)

		return ret;



	pci_disable_device(pdev);

	pci_wake_from_d3(pdev, true);



	return 0;

}

EXPORT_SYMBOL_GPL(stmmac_pci_plat_suspend);



int stmmac_pci_plat_resume(struct device *dev, void *bsp_priv)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	int ret;



	pci_restore_state(pdev);

	pci_set_power_state(pdev, PCI_D0);



	ret = pci_enable_device(pdev);

	if (ret)

		return ret;



	pci_set_master(pdev);



	return 0;

}

EXPORT_SYMBOL_GPL(stmmac_pci_plat_resume);



MODULE_DESCRIPTION("STMMAC PCI helper library");

MODULE_AUTHOR("Yao Zi <ziyao@disroot.org>");

MODULE_LICENSE("GPL");

drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (C) 2025 Yao Zi <ziyao@disroot.org>

 */



#ifndef __STMMAC_LIBPCI_H__

#define __STMMAC_LIBPCI_H__



int stmmac_pci_plat_suspend(struct device *dev, void *bsp_priv);

int stmmac_pci_plat_resume(struct device *dev, void *bsp_priv);



#endif /* __STMMAC_LIBPCI_H__ */