net: stmmac: disable/enable ptp_ref_clk in suspend/resume flow

[ Upstream commit e497c20e203680aba9ccf7bb475959595908ca7e ]

disable ptp_ref_clk in suspend flow, and enable it in resume flow.

Fixes: f573c0b9c4e0 ("stmmac: move stmmac_clk, pclk, clk_ptp_ref and stmmac_rst to platform structure")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 0101eba..014fe93 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4522,8 +4522,10 @@ int stmmac_suspend(struct device *dev)
                stmmac_mac_set(priv, priv->ioaddr, false);
                pinctrl_pm_select_sleep_state(priv->device);
                /* Disable clock in case of PWM is off */
-               clk_disable(priv->plat->pclk);
-               clk_disable(priv->plat->stmmac_clk);
+               if (priv->plat->clk_ptp_ref)
+                       clk_disable_unprepare(priv->plat->clk_ptp_ref);
+               clk_disable_unprepare(priv->plat->pclk);
+               clk_disable_unprepare(priv->plat->stmmac_clk);
        }
        mutex_unlock(&priv->lock);
 
@@ -4588,8 +4590,10 @@ int stmmac_resume(struct device *dev)
        } else {
                pinctrl_pm_select_default_state(priv->device);
                /* enable the clk previously disabled */
-               clk_enable(priv->plat->stmmac_clk);
-               clk_enable(priv->plat->pclk);
+               clk_prepare_enable(priv->plat->stmmac_clk);
+               clk_prepare_enable(priv->plat->pclk);
+               if (priv->plat->clk_ptp_ref)
+                       clk_prepare_enable(priv->plat->clk_ptp_ref);
                /* reset the phy so that it's ready */
                if (priv->mii)
                        stmmac_mdio_reset(priv->mii);