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net/at91_ether: prepare and unprepare clock 

The clock is enabled without being prepared, this leads to:

WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:889 __clk_enable+0x24/0xa8()

and a non working ethernet interface.

Use clk_prepare_enable() and clk_disable_unprepare() to handle the clock.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexandre Belloni 2015-01-07 23:59:26 +01:00 committed by David S. Miller
parent 6205864799
commit caffd45e2e
1 changed files with 5 additions and 5 deletions
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10
drivers/net/ethernet/cadence/at91_ether.c
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@ -340,7 +340,7 @@ static int __init at91ether_probe(struct platform_device *pdev)
res = PTR_ERR(lp->pclk);
goto err_free_dev;
}
clk_enable(lp->pclk);
clk_prepare_enable(lp->pclk);
lp->hclk = ERR_PTR(-ENOENT);
lp->tx_clk = ERR_PTR(-ENOENT);
@ -406,7 +406,7 @@ static int __init at91ether_probe(struct platform_device *pdev)
err_out_unregister_netdev:
unregister_netdev(dev);
err_disable_clock:
clk_disable(lp->pclk);
clk_disable_unprepare(lp->pclk);
err_free_dev:
free_netdev(dev);
return res;
@ -424,7 +424,7 @@ static int at91ether_remove(struct platform_device *pdev)
kfree(lp->mii_bus->irq);
mdiobus_free(lp->mii_bus);
unregister_netdev(dev);
clk_disable(lp->pclk);
clk_disable_unprepare(lp->pclk);
free_netdev(dev);
return 0;
@ -440,7 +440,7 @@ static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg)
netif_stop_queue(net_dev);
netif_device_detach(net_dev);
clk_disable(lp->pclk);
clk_disable_unprepare(lp->pclk);
}
return 0;
}
@ -451,7 +451,7 @@ static int at91ether_resume(struct platform_device *pdev)
struct macb *lp = netdev_priv(net_dev);
if (netif_running(net_dev)) {
clk_enable(lp->pclk);
clk_prepare_enable(lp->pclk);
netif_device_attach(net_dev);
netif_start_queue(net_dev);