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Merge branch 'fec'

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Fabio Estevam says:

====================
This series improves clock handling in the driver by not enabling/disabling
the optional ptp and enet_out clocks unconditionally, check for the return value
of clk_prepare_enable and also handle clk_ptp in suspend/resume.

Remove an unneeded check in platform_get_resource() and also use
devm_request_irq() that can help to simplify the code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Frank Li <lznuaa@gmail.com>
This commit is contained in:
David S. Miller 2013-07-22 16:50:38 -07:00
commit c3f51d5f38
1 changed files with 73 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
drivers/net/ethernet/freescale/fec_main.c
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@ -2033,10 +2033,6 @@ fec_probe(struct platform_device *pdev)
if (of_id)
pdev->id_entry = of_id->data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
return -ENXIO;
/* Init network device */
ndev = alloc_etherdev(sizeof(struct fec_enet_private));
if (!ndev)
@ -2054,6 +2050,7 @@ fec_probe(struct platform_device *pdev)
fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG;
#endif
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fep->hwp = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(fep->hwp)) {
ret = PTR_ERR(fep->hwp);
@ -2103,10 +2100,25 @@ fec_probe(struct platform_device *pdev)
fep->bufdesc_ex = 0;
}
clk_prepare_enable(fep->clk_ahb);
clk_prepare_enable(fep->clk_ipg);
clk_prepare_enable(fep->clk_enet_out);
clk_prepare_enable(fep->clk_ptp);
ret = clk_prepare_enable(fep->clk_ahb);
if (ret)
goto failed_clk;
ret = clk_prepare_enable(fep->clk_ipg);
if (ret)
goto failed_clk_ipg;
if (fep->clk_enet_out) {
ret = clk_prepare_enable(fep->clk_enet_out);
if (ret)
goto failed_clk_enet_out;
}
if (fep->clk_ptp) {
ret = clk_prepare_enable(fep->clk_ptp);
if (ret)
goto failed_clk_ptp;
}
fep->reg_phy = devm_regulator_get(&pdev->dev, "phy");
if (!IS_ERR(fep->reg_phy)) {
@ -2137,14 +2149,10 @@ fec_probe(struct platform_device *pdev)
ret = irq;
goto failed_irq;
}
ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
if (ret) {
while (--i >= 0) {
irq = platform_get_irq(pdev, i);
free_irq(irq, ndev);
}
ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt,
IRQF_DISABLED, pdev->name, ndev);
if (ret)
goto failed_irq;
}
}
ret = fec_enet_mii_init(pdev);
@ -2168,19 +2176,19 @@ failed_register:
fec_enet_mii_remove(fep);
failed_mii_init:
failed_irq:
for (i = 0; i < FEC_IRQ_NUM; i++) {
irq = platform_get_irq(pdev, i);
if (irq > 0)
free_irq(irq, ndev);
}
failed_init:
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
failed_regulator:
clk_disable_unprepare(fep->clk_ahb);
if (fep->clk_ptp)
clk_disable_unprepare(fep->clk_ptp);
failed_clk_ptp:
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
failed_clk_enet_out:
clk_disable_unprepare(fep->clk_ipg);
clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ptp);
failed_clk_ipg:
clk_disable_unprepare(fep->clk_ahb);
failed_clk:
failed_ioremap:
free_netdev(ndev);
@ -2193,25 +2201,21 @@ fec_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(ndev);
int i;
cancel_delayed_work_sync(&(fep->delay_work.delay_work));
unregister_netdev(ndev);
fec_enet_mii_remove(fep);
del_timer_sync(&fep->time_keep);
for (i = 0; i < FEC_IRQ_NUM; i++) {
int irq = platform_get_irq(pdev, i);
if (irq > 0)
free_irq(irq, ndev);
}
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
clk_disable_unprepare(fep->clk_ptp);
if (fep->clk_ptp)
clk_disable_unprepare(fep->clk_ptp);
if (fep->ptp_clock)
ptp_clock_unregister(fep->ptp_clock);
clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ahb);
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ipg);
clk_disable_unprepare(fep->clk_ahb);
free_netdev(ndev);
return 0;
@ -2228,9 +2232,12 @@ fec_suspend(struct device *dev)
fec_stop(ndev);
netif_device_detach(ndev);
}
clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ahb);
if (fep->clk_ptp)
clk_disable_unprepare(fep->clk_ptp);
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
clk_disable_unprepare(fep->clk_ipg);
clk_disable_unprepare(fep->clk_ahb);
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
@ -2251,15 +2258,44 @@ fec_resume(struct device *dev)
return ret;
}
clk_prepare_enable(fep->clk_enet_out);
clk_prepare_enable(fep->clk_ahb);
clk_prepare_enable(fep->clk_ipg);
ret = clk_prepare_enable(fep->clk_ahb);
if (ret)
goto failed_clk_ahb;
ret = clk_prepare_enable(fep->clk_ipg);
if (ret)
goto failed_clk_ipg;
if (fep->clk_enet_out) {
ret = clk_prepare_enable(fep->clk_enet_out);
if (ret)
goto failed_clk_enet_out;
}
if (fep->clk_ptp) {
ret = clk_prepare_enable(fep->clk_ptp);
if (ret)
goto failed_clk_ptp;
}
if (netif_running(ndev)) {
fec_restart(ndev, fep->full_duplex);
netif_device_attach(ndev);
}
return 0;
failed_clk_ptp:
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
failed_clk_enet_out:
clk_disable_unprepare(fep->clk_ipg);
failed_clk_ipg:
clk_disable_unprepare(fep->clk_ahb);
failed_clk_ahb:
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
return ret;
}
#endif /* CONFIG_PM_SLEEP */