[PATCH 14/26] net: stmmac: dwmac-qcom-ethqos: add optional phyaux clock

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski at linaro.org>

On sa8775p we don't use the RGMII clock but have an additional PHYAUX
clock so add support for it to the driver.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski at linaro.org>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 252dca400071..2f6b9b419601 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -94,6 +94,7 @@ struct qcom_ethqos {
 
 	unsigned int rgmii_clk_rate;
 	struct clk *rgmii_clk;
+	struct clk *phyaux_clk;
 	struct phy *serdes_phy;
 	unsigned int speed;
 
@@ -604,6 +605,13 @@ static int ethqos_clks_config(void *priv, bool enabled)
 			return ret;
 		}
 
+		ret = clk_prepare_enable(ethqos->phyaux_clk);
+		if (ret) {
+			clk_disable_unprepare(ethqos->rgmii_clk);
+			dev_err(&ethqos->pdev->dev, "phyaux enable failed\n");
+			return ret;
+		}
+
 		/* Enable functional clock to prevent DMA reset to timeout due
 		 * to lacking PHY clock after the hardware block has been power
 		 * cycled. The actual configuration will be adjusted once
@@ -611,6 +619,7 @@ static int ethqos_clks_config(void *priv, bool enabled)
 		 */
 		ethqos_set_func_clk_en(ethqos);
 	} else {
+		clk_disable_unprepare(ethqos->phyaux_clk);
 		clk_disable_unprepare(ethqos->rgmii_clk);
 	}
 
@@ -669,6 +678,12 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		goto out_config_dt;
 	}
 
+	ethqos->phyaux_clk = devm_clk_get_optional(dev, "phyaux");
+	if (IS_ERR(ethqos->phyaux_clk)) {
+		ret = PTR_ERR(ethqos->phyaux_clk);
+		goto out_config_dt;
+	}
+
 	ret = ethqos_clks_config(ethqos, true);
 	if (ret)
 		goto out_config_dt;
-- 
2.39.2