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authorAndy Duan <fugang.duan@nxp.com>2019-04-09 03:40:56 +0000
committerDavid S. Miller <davem@davemloft.net>2019-04-11 13:53:28 -0700
commitd7c3a206e6338e4ccdf030719dec028e26a521d5 (patch)
treec8551097fed59f707e47b87597fae71417b870b3 /drivers/net/ethernet
parentc5b493ce192bd7a4e7bd073b5685aad121eeef82 (diff)
net: fec: manage ahb clock in runtime pm
Some SOC like i.MX6SX clock have some limits: - ahb clock should be disabled before ipg. - ahb and ipg clocks are required for MAC MII bus. So, move the ahb clock to runtime management together with ipg clock. Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/freescale/fec_main.c30
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 697c2427f2b7..a96ad20ee484 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1840,13 +1840,9 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
int ret;
if (enable) {
- ret = clk_prepare_enable(fep->clk_ahb);
- if (ret)
- return ret;
-
ret = clk_prepare_enable(fep->clk_enet_out);
if (ret)
- goto failed_clk_enet_out;
+ return ret;
if (fep->clk_ptp) {
mutex_lock(&fep->ptp_clk_mutex);
@@ -1866,7 +1862,6 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
phy_reset_after_clk_enable(ndev->phydev);
} else {
- clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_enet_out);
if (fep->clk_ptp) {
mutex_lock(&fep->ptp_clk_mutex);
@@ -1885,8 +1880,6 @@ failed_clk_ref:
failed_clk_ptp:
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
-failed_clk_enet_out:
- clk_disable_unprepare(fep->clk_ahb);
return ret;
}
@@ -3470,6 +3463,9 @@ fec_probe(struct platform_device *pdev)
ret = clk_prepare_enable(fep->clk_ipg);
if (ret)
goto failed_clk_ipg;
+ ret = clk_prepare_enable(fep->clk_ahb);
+ if (ret)
+ goto failed_clk_ahb;
fep->reg_phy = devm_regulator_get_optional(&pdev->dev, "phy");
if (!IS_ERR(fep->reg_phy)) {
@@ -3563,6 +3559,9 @@ failed_reset:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
failed_regulator:
+ clk_disable_unprepare(fep->clk_ahb);
+failed_clk_ahb:
+ clk_disable_unprepare(fep->clk_ipg);
failed_clk_ipg:
fec_enet_clk_enable(ndev, false);
failed_clk:
@@ -3686,6 +3685,7 @@ static int __maybe_unused fec_runtime_suspend(struct device *dev)
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
+ clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
return 0;
@@ -3695,8 +3695,20 @@ static int __maybe_unused fec_runtime_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
+ int ret;
- return clk_prepare_enable(fep->clk_ipg);
+ ret = clk_prepare_enable(fep->clk_ahb);
+ if (ret)
+ return ret;
+ ret = clk_prepare_enable(fep->clk_ipg);
+ if (ret)
+ goto failed_clk_ipg;
+
+ return 0;
+
+failed_clk_ipg:
+ clk_disable_unprepare(fep->clk_ahb);
+ return ret;
}
static const struct dev_pm_ops fec_pm_ops = {