net: stmmac: dwmac-qcom-ethqos: add platform level clocks management

Split clocks settings from init callback into clks_config callback,
which could support platform level clock management.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -447,6 +447,24 @@ static void ethqos_fix_mac_speed(void *priv, unsigned int speed)
 	ethqos_configure(ethqos);
 }
 
+static int ethqos_clks_config(void *priv, bool enabled)
+{
+	struct qcom_ethqos *ethqos = priv;
+	int ret = 0;
+
+	if (enabled) {
+		ret = clk_prepare_enable(ethqos->rgmii_clk);
+		if (ret) {
+			dev_err(&ethqos->pdev->dev, "rgmii_clk enable failed\n");
+			return ret;
+		}
+	} else {
+		clk_disable_unprepare(ethqos->rgmii_clk);
+	}
+
+	return ret;
+}
+
 static int qcom_ethqos_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -466,6 +484,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		return PTR_ERR(plat_dat);
 	}
 
+	plat_dat->clks_config = ethqos_clks_config;
+
 	ethqos = devm_kzalloc(&pdev->dev, sizeof(*ethqos), GFP_KERNEL);
 	if (!ethqos) {
 		ret = -ENOMEM;
@@ -489,7 +509,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		goto err_mem;
 	}
 
-	ret = clk_prepare_enable(ethqos->rgmii_clk);
+	ret = ethqos_clks_config(ethqos, true);
 	if (ret)
 		goto err_mem;
 
@@ -512,7 +532,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	return ret;
 
 err_clk:
-	clk_disable_unprepare(ethqos->rgmii_clk);
+	ethqos_clks_config(ethqos, false);
 
 err_mem:
 	stmmac_remove_config_dt(pdev, plat_dat);
@@ -530,7 +550,7 @@ static int qcom_ethqos_remove(struct platform_device *pdev)
 		return -ENODEV;
 
 	ret = stmmac_pltfr_remove(pdev);
-	clk_disable_unprepare(ethqos->rgmii_clk);
+	ethqos_clks_config(ethqos, false);
 
 	return ret;
 }