net: stmmac: disable & enable clock on suspend resume

disable all eth clocks on suspend and enable them on resume.

Change-Id: I65e80188e2cce0967b5bce8f0f5f55c842f40aa0
Signed-off-by: Sneh Shah <snehshah@codeaurora.org>

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

@@ -1464,6 +1464,8 @@ err_out:
 
 static void qcom_ethqos_phy_suspend_clks(struct qcom_ethqos *ethqos)
 {
+	struct stmmac_priv *priv = qcom_ethqos_get_priv(ethqos);
+
 	ETHQOSINFO("Enter\n");
 
 	if (phy_intr_en)
@@ -1473,6 +1475,18 @@ static void qcom_ethqos_phy_suspend_clks(struct qcom_ethqos *ethqos)
 
 	ethqos_update_rgmii_clk_and_bus_cfg(ethqos, 0);
 
+	if (priv->plat->stmmac_clk)
+		clk_disable_unprepare(priv->plat->stmmac_clk);
+
+	if (priv->plat->pclk)
+		clk_disable_unprepare(priv->plat->pclk);
+
+	if (priv->plat->clk_ptp_ref)
+		clk_disable_unprepare(priv->plat->clk_ptp_ref);
+
+	if (ethqos->rgmii_clk)
+		clk_disable_unprepare(ethqos->rgmii_clk);
+
 	ETHQOSINFO("Exit\n");
 }
 
@@ -1498,8 +1512,22 @@ inline bool qcom_ethqos_is_phy_link_up(struct qcom_ethqos *ethqos)
 
 static void qcom_ethqos_phy_resume_clks(struct qcom_ethqos *ethqos)
 {
+	struct stmmac_priv *priv = qcom_ethqos_get_priv(ethqos);
+
 	ETHQOSINFO("Enter\n");
 
+	if (priv->plat->stmmac_clk)
+		clk_prepare_enable(priv->plat->stmmac_clk);
+
+	if (priv->plat->pclk)
+		clk_prepare_enable(priv->plat->pclk);
+
+	if (priv->plat->clk_ptp_ref)
+		clk_prepare_enable(priv->plat->clk_ptp_ref);
+
+	if (ethqos->rgmii_clk)
+		clk_prepare_enable(ethqos->rgmii_clk);
+
 	if (qcom_ethqos_is_phy_link_up(ethqos))
 		ethqos_update_rgmii_clk_and_bus_cfg(ethqos, ethqos->speed);
 	else