iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: ethernet: bgmac: driver power manangement

Browse Source 
Implement suspend/resume callbacks in the bgmac driver. This makes sure
that we de-initialize and re-initialize the hardware correctly before
entering suspend and when resuming.

Signed-off-by: Joey Zhong <zhongx@broadcom.com>
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joey Zhong 2017-02-28 13:51:01 -05:00 committed by David S. Miller
parent cb1b0f90ac
commit f3537b3494
3 changed files with 87 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/net/ethernet/broadcom/bgmac-platform.c
View File

@ -21,8 +21,12 @@
#include <linux/of_net.h>
#include "bgmac.h"
#define NICPM_PADRING_CFG 0x00000004
#define NICPM_IOMUX_CTRL 0x00000008
#define NICPM_PADRING_CFG_INIT_VAL 0x74000000
#define NICPM_IOMUX_CTRL_INIT_VAL_AX 0x21880000
#define NICPM_IOMUX_CTRL_INIT_VAL 0x3196e000
#define NICPM_IOMUX_CTRL_SPD_SHIFT 10
#define NICPM_IOMUX_CTRL_SPD_10M 0
@ -113,6 +117,10 @@ static void bgmac_nicpm_speed_set(struct net_device *net_dev)
if (!bgmac->plat.nicpm_base)
return;
/* SET RGMII IO CONFIG */
writel(NICPM_PADRING_CFG_INIT_VAL,
bgmac->plat.nicpm_base + NICPM_PADRING_CFG);
val = NICPM_IOMUX_CTRL_INIT_VAL;
switch (bgmac->net_dev->phydev->speed) {
default:
@ -244,6 +252,31 @@ static int bgmac_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int bgmac_suspend(struct device *dev)
{
struct bgmac *bgmac = dev_get_drvdata(dev);
return bgmac_enet_suspend(bgmac);
}
static int bgmac_resume(struct device *dev)
{
struct bgmac *bgmac = dev_get_drvdata(dev);
return bgmac_enet_resume(bgmac);
}
static const struct dev_pm_ops bgmac_pm_ops = {
.suspend = bgmac_suspend,
.resume = bgmac_resume
};
#define BGMAC_PM_OPS (&bgmac_pm_ops)
#else
#define BGMAC_PM_OPS NULL
#endif /* CONFIG_PM */
static const struct of_device_id bgmac_of_enet_match[] = {
{.compatible = "brcm,amac",},
{.compatible = "brcm,nsp-amac",},
@ -257,6 +290,7 @@ static struct platform_driver bgmac_enet_driver = {
.driver = {
.name = "bgmac-enet",
.of_match_table = bgmac_of_enet_match,
.pm = BGMAC_PM_OPS
},
.probe = bgmac_probe,
.remove = bgmac_remove,

51
drivers/net/ethernet/broadcom/bgmac.c
View File

@ -1480,6 +1480,7 @@ int bgmac_enet_probe(struct bgmac *bgmac)
net_dev->irq = bgmac->irq;
SET_NETDEV_DEV(net_dev, bgmac->dev);
dev_set_drvdata(bgmac->dev, bgmac);
if (!is_valid_ether_addr(net_dev->dev_addr)) {
dev_err(bgmac->dev, "Invalid MAC addr: %pM\n",
@ -1552,5 +1553,55 @@ void bgmac_enet_remove(struct bgmac *bgmac)
}
EXPORT_SYMBOL_GPL(bgmac_enet_remove);
int bgmac_enet_suspend(struct bgmac *bgmac)
{
if (!netif_running(bgmac->net_dev))
return 0;
phy_stop(bgmac->net_dev->phydev);
netif_stop_queue(bgmac->net_dev);
napi_disable(&bgmac->napi);
netif_tx_lock(bgmac->net_dev);
netif_device_detach(bgmac->net_dev);
netif_tx_unlock(bgmac->net_dev);
bgmac_chip_intrs_off(bgmac);
bgmac_chip_reset(bgmac);
bgmac_dma_cleanup(bgmac);
return 0;
}
EXPORT_SYMBOL_GPL(bgmac_enet_suspend);
int bgmac_enet_resume(struct bgmac *bgmac)
{
int rc;
if (!netif_running(bgmac->net_dev))
return 0;
rc = bgmac_dma_init(bgmac);
if (rc)
return rc;
bgmac_chip_init(bgmac);
napi_enable(&bgmac->napi);
netif_tx_lock(bgmac->net_dev);
netif_device_attach(bgmac->net_dev);
netif_tx_unlock(bgmac->net_dev);
netif_start_queue(bgmac->net_dev);
phy_start(bgmac->net_dev->phydev);
return 0;
}
EXPORT_SYMBOL_GPL(bgmac_enet_resume);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_LICENSE("GPL");

2
drivers/net/ethernet/broadcom/bgmac.h
View File

@ -537,6 +537,8 @@ int bgmac_enet_probe(struct bgmac *bgmac);
void bgmac_enet_remove(struct bgmac *bgmac);
void bgmac_adjust_link(struct net_device *net_dev);
int bgmac_phy_connect_direct(struct bgmac *bgmac);
int bgmac_enet_suspend(struct bgmac *bgmac);
int bgmac_enet_resume(struct bgmac *bgmac);
struct mii_bus *bcma_mdio_mii_register(struct bgmac *bgmac);
void bcma_mdio_mii_unregister(struct mii_bus *mii_bus);