[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.

Signed-off-by: Biao Huang <biao.huang@xxxxxxxxxxxx>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c7c9e5f162e6..b592aeecc3dd 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4469,6 +4469,8 @@ 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 */
+		if (priv->plat->clk_ptp_ref)
+			clk_disable_unprepare(priv->plat->clk_ptp_ref);
 		clk_disable(priv->plat->pclk);
 		clk_disable(priv->plat->stmmac_clk);
 	}
@@ -4535,6 +4537,8 @@ int stmmac_resume(struct device *dev)
 		/* enable the clk previously disabled */
 		clk_enable(priv->plat->stmmac_clk);
 		clk_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