diff options
author | Magnus Damm <damm@opensource.se> | 2009-10-09 00:20:04 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-10-13 03:44:05 -0700 |
commit | bcd5149ded6b2edbf3732fa1483600a716b1cba6 (patch) | |
tree | ad517e9c9d196a76d7b7d50602f5c82c96fac996 /drivers/net/sh_eth.c | |
parent | 748031f9fd2c06b28817d80761a5de97190cfd03 (diff) | |
download | linux-3.10-bcd5149ded6b2edbf3732fa1483600a716b1cba6.tar.gz linux-3.10-bcd5149ded6b2edbf3732fa1483600a716b1cba6.tar.bz2 linux-3.10-bcd5149ded6b2edbf3732fa1483600a716b1cba6.zip |
net: add Runtime PM to the sh_eth driver
Add Runtime PM support to the sh_eth driver.
The clock to the ethernet hardware block will be
enabled as long as the network device is up.
Signed-off-by: Magnus Damm <damm@opensource.se>
Tested-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sh_eth.c')
-rw-r--r-- | drivers/net/sh_eth.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c index a4da7e7574e..161181a4b3d 100644 --- a/drivers/net/sh_eth.c +++ b/drivers/net/sh_eth.c @@ -30,7 +30,7 @@ #include <linux/phy.h> #include <linux/cache.h> #include <linux/io.h> - +#include <linux/pm_runtime.h> #include "sh_eth.h" /* There is CPU dependent code */ @@ -1012,6 +1012,8 @@ static int sh_eth_open(struct net_device *ndev) int ret = 0; struct sh_eth_private *mdp = netdev_priv(ndev); + pm_runtime_get_sync(&mdp->pdev->dev); + ret = request_irq(ndev->irq, &sh_eth_interrupt, #if defined(CONFIG_CPU_SUBTYPE_SH7763) || defined(CONFIG_CPU_SUBTYPE_SH7764) IRQF_SHARED, @@ -1048,6 +1050,7 @@ static int sh_eth_open(struct net_device *ndev) out_free_irq: free_irq(ndev->irq, ndev); + pm_runtime_put_sync(&mdp->pdev->dev); return ret; } @@ -1179,6 +1182,8 @@ static int sh_eth_close(struct net_device *ndev) ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE; dma_free_coherent(NULL, ringsize, mdp->tx_ring, mdp->tx_desc_dma); + pm_runtime_put_sync(&mdp->pdev->dev); + return 0; } @@ -1187,6 +1192,8 @@ static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev) struct sh_eth_private *mdp = netdev_priv(ndev); u32 ioaddr = ndev->base_addr; + pm_runtime_get_sync(&mdp->pdev->dev); + mdp->stats.tx_dropped += ctrl_inl(ioaddr + TROCR); ctrl_outl(0, ioaddr + TROCR); /* (write clear) */ mdp->stats.collisions += ctrl_inl(ioaddr + CDCR); @@ -1202,6 +1209,8 @@ static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev) mdp->stats.tx_carrier_errors += ctrl_inl(ioaddr + CNDCR); ctrl_outl(0, ioaddr + CNDCR); /* (write clear) */ #endif + pm_runtime_put_sync(&mdp->pdev->dev); + return &mdp->stats; } @@ -1410,6 +1419,9 @@ static int sh_eth_drv_probe(struct platform_device *pdev) mdp = netdev_priv(ndev); spin_lock_init(&mdp->lock); + mdp->pdev = pdev; + pm_runtime_enable(&pdev->dev); + pm_runtime_resume(&pdev->dev); pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data); /* get PHY ID */ @@ -1485,18 +1497,37 @@ static int sh_eth_drv_remove(struct platform_device *pdev) sh_mdio_release(ndev); unregister_netdev(ndev); flush_scheduled_work(); - + pm_runtime_disable(&pdev->dev); free_netdev(ndev); platform_set_drvdata(pdev, NULL); return 0; } +static int sh_eth_runtime_nop(struct device *dev) +{ + /* + * Runtime PM callback shared between ->runtime_suspend() + * and ->runtime_resume(). Simply returns success. + * + * This driver re-initializes all registers after + * pm_runtime_get_sync() anyway so there is no need + * to save and restore registers here. + */ + return 0; +} + +static struct dev_pm_ops sh_eth_dev_pm_ops = { + .runtime_suspend = sh_eth_runtime_nop, + .runtime_resume = sh_eth_runtime_nop, +}; + static struct platform_driver sh_eth_driver = { .probe = sh_eth_drv_probe, .remove = sh_eth_drv_remove, .driver = { .name = CARDNAME, + .pm = &sh_eth_dev_pm_ops, }, }; |