admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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: Yao Zi <ziyao@disroot.org>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Yanteng Si <siyanteng@cqsoftware.com.cn>
Link: https://patch.msgid.link/20251124160417.51514-2-ziyao@disroot.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yao Zi
2025-11-24 16:04:15 +00:00
committed by Jakub Kicinski
parent fdaf715b1a
commit 4440bf5f2e
4 changed files with 66 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/ethernet/stmicro/stmmac/Kconfig
View File

@@ -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

1
drivers/net/ethernet/stmicro/stmmac/Makefile
View File

@@ -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

48
drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c Normal file
View File

@@ -0,0 +1,48 @@
// 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");

12
drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h Normal file
View File

@@ -0,0 +1,12 @@
/* 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__ */