fec: Do not enable/disable optional clocks unconditionally

clk_enet_out and clk_ptp are optional clocks, so we should not enable/disable
them unconditionally.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index d3ad5ea..beaa576 100644 (file)
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2105,8 +2105,10 @@ fec_probe(struct platform_device *pdev)
 
        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);
+       if (fep->clk_enet_out)
+               clk_prepare_enable(fep->clk_enet_out);
+       if (fep->clk_ptp)
+               clk_prepare_enable(fep->clk_ptp);
 
        fep->reg_phy = devm_regulator_get(&pdev->dev, "phy");
        if (!IS_ERR(fep->reg_phy)) {
@@ -2179,8 +2181,10 @@ failed_init:
 failed_regulator:
        clk_disable_unprepare(fep->clk_ahb);
        clk_disable_unprepare(fep->clk_ipg);
-       clk_disable_unprepare(fep->clk_enet_out);
-       clk_disable_unprepare(fep->clk_ptp);
+       if (fep->clk_enet_out)
+               clk_disable_unprepare(fep->clk_enet_out);
+       if (fep->clk_ptp)
+               clk_disable_unprepare(fep->clk_ptp);
 failed_clk:
 failed_ioremap:
        free_netdev(ndev);
@@ -2206,10 +2210,12 @@ fec_drv_remove(struct platform_device *pdev)
        }
        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);
+       if (fep->clk_enet_out)
+               clk_disable_unprepare(fep->clk_enet_out);
        clk_disable_unprepare(fep->clk_ahb);
        clk_disable_unprepare(fep->clk_ipg);
        free_netdev(ndev);
@@ -2228,7 +2234,8 @@ fec_suspend(struct device *dev)
                fec_stop(ndev);
                netif_device_detach(ndev);
        }
-       clk_disable_unprepare(fep->clk_enet_out);
+       if (fep->clk_enet_out)
+               clk_disable_unprepare(fep->clk_enet_out);
        clk_disable_unprepare(fep->clk_ahb);
        clk_disable_unprepare(fep->clk_ipg);
 
@@ -2251,7 +2258,8 @@ fec_resume(struct device *dev)
                        return ret;
        }
 
-       clk_prepare_enable(fep->clk_enet_out);
+       if (fep->clk_enet_out)
+               clk_prepare_enable(fep->clk_enet_out);
        clk_prepare_enable(fep->clk_ahb);
        clk_prepare_enable(fep->clk_ipg);
        if (netif_running(ndev)) {