[v2, PATCH] net: stmmac: disable/enable ptp_ref_clk in suspend/resume flow

[Biao Huang]

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.hu...@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c 
b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index d3232738fb25..d7c12b86b94f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4737,8 +4737,10 @@ 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);
 
@@ -4801,8 +4803,10 @@ 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);
-- 
2.18.0