AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-25 22:25:37 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

net: systemport: fetch and use clock resources

Browse Source 
We disable clocks shortly after probing the device to save as much power as
possible in case the interface is never used. When bcm_sysport_open() is
invoked, clocks are enabled, and disabled in bcm_sysport_stop().

A similar scheme is applied to the suspend/resume functions.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-09-01 14:43:47 -07:00 committed by David S. Miller
parent af89606924
commit 31bc72d976
2 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/ethernet/broadcom/bcmsysport.c
View File

@ -20,6 +20,7 @@
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <net/dsa.h>
#include <linux/clk.h>
#include <net/ip.h>
#include <net/ipv6.h>
@ -186,6 +187,11 @@ static int bcm_sysport_set_features(struct net_device *dev,
netdev_features_t features)
{
struct bcm_sysport_priv *priv = netdev_priv(dev);
int ret;
ret = clk_prepare_enable(priv->clk);
if (ret)
return ret;
/* Read CRC forward */
if (!priv->is_lite)
@ -197,6 +203,8 @@ static int bcm_sysport_set_features(struct net_device *dev,
bcm_sysport_set_rx_csum(dev, features);
bcm_sysport_set_tx_csum(dev, features);
clk_disable_unprepare(priv->clk);
return 0;
}
@ -1940,6 +1948,8 @@ static int bcm_sysport_open(struct net_device *dev)
unsigned int i;
int ret;
clk_prepare_enable(priv->clk);
/* Reset UniMAC */
umac_reset(priv);
@ -1970,7 +1980,8 @@ static int bcm_sysport_open(struct net_device *dev)
0, priv->phy_interface);
if (!phydev) {
netdev_err(dev, "could not attach to PHY\n");
return -ENODEV;
ret = -ENODEV;
goto out_clk_disable;
}
/* Reset house keeping link status */
@ -2048,6 +2059,8 @@ static int bcm_sysport_open(struct net_device *dev)
free_irq(priv->irq0, dev);
out_phy_disconnect:
phy_disconnect(phydev);
out_clk_disable:
clk_disable_unprepare(priv->clk);
return ret;
}
@ -2106,6 +2119,8 @@ static int bcm_sysport_stop(struct net_device *dev)
/* Disconnect from PHY */
phy_disconnect(dev->phydev);
clk_disable_unprepare(priv->clk);
return 0;
}
@ -2487,6 +2502,10 @@ static int bcm_sysport_probe(struct platform_device *pdev)
/* Initialize private members */
priv = netdev_priv(dev);
priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
if (IS_ERR(priv->clk))
return PTR_ERR(priv->clk);
/* Allocate number of TX rings */
priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
sizeof(struct bcm_sysport_tx_ring),
@ -2588,6 +2607,8 @@ static int bcm_sysport_probe(struct platform_device *pdev)
goto err_deregister_notifier;
}
clk_prepare_enable(priv->clk);
priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
dev_info(&pdev->dev,
"Broadcom SYSTEMPORT%s " REV_FMT
@ -2596,6 +2617,8 @@ static int bcm_sysport_probe(struct platform_device *pdev)
(priv->rev >> 8) & 0xff, priv->rev & 0xff,
priv->irq0, priv->irq1, txq, rxq);
clk_disable_unprepare(priv->clk);
return 0;
err_deregister_notifier:
@ -2752,6 +2775,8 @@ static int __maybe_unused bcm_sysport_suspend(struct device *d)
if (device_may_wakeup(d) && priv->wolopts)
ret = bcm_sysport_suspend_to_wol(priv);
clk_disable_unprepare(priv->clk);
return ret;
}
@ -2765,6 +2790,8 @@ static int __maybe_unused bcm_sysport_resume(struct device *d)
if (!netif_running(dev))
return 0;
clk_prepare_enable(priv->clk);
umac_reset(priv);
/* Disable the UniMAC RX/TX */
@ -2844,6 +2871,7 @@ static int __maybe_unused bcm_sysport_resume(struct device *d)
out_free_tx_rings:
for (i = 0; i < dev->num_tx_queues; i++)
bcm_sysport_fini_tx_ring(priv, i);
clk_disable_unprepare(priv->clk);
return ret;
}

1
drivers/net/ethernet/broadcom/bcmsysport.h
View File

@ -770,6 +770,7 @@ struct bcm_sysport_priv {
u32 wolopts;
u8 sopass[SOPASS_MAX];
unsigned int wol_irq_disabled:1;
struct clk *clk;
/* MIB related fields */
struct bcm_sysport_mib mib;