net: fec_mxc: support i.MX8M with CLK_CCF

Add more clks for fec_mxc according to Linux Kernel 5.4.0-rc1
drivers/net/ethernet/freescale/fec_main.c.

Since i.MX8MQ not support CLK_CCF, so add a check to restrict
the code only effect when CONFIG_IMX8M and CONFIG_CLK_CCF both defined.

Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

2 files changed, 68 insertions, 15 deletions

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 080dbcf..131d199 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -123,30 +123,38 @@ static int fec_mdio_read(struct ethernet_regs *eth, uint8_t phyaddr,
 	return val;
 }
 
+#ifndef imx_get_fecclk
+u32 __weak imx_get_fecclk(void)
+{
+	return 0;
+}
+#endif
+
 static int fec_get_clk_rate(void *udev, int idx)
 {
-#if IS_ENABLED(CONFIG_IMX8)
 	struct fec_priv *fec;
 	struct udevice *dev;
 	int ret;
 
-	dev = udev;
-	if (!dev) {
-		ret = uclass_get_device(UCLASS_ETH, idx, &dev);
-		if (ret < 0) {
-			debug("Can't get FEC udev: %d\n", ret);
-			return ret;
+	if (IS_ENABLED(CONFIG_IMX8) ||
+	    CONFIG_IS_ENABLED(CLK_CCF)) {
+		dev = udev;
+		if (!dev) {
+			ret = uclass_get_device(UCLASS_ETH, idx, &dev);
+			if (ret < 0) {
+				debug("Can't get FEC udev: %d\n", ret);
+				return ret;
+			}
 		}
-	}
 
-	fec = dev_get_priv(dev);
-	if (fec)
-		return fec->clk_rate;
+		fec = dev_get_priv(dev);
+		if (fec)
+			return fec->clk_rate;
 
-	return -EINVAL;
-#else
-	return imx_get_fecclk();
-#endif
+		return -EINVAL;
+	} else {
+		return imx_get_fecclk();
+	}
 }
 
 static void fec_mii_setspeed(struct ethernet_regs *eth)
@@ -1336,6 +1344,47 @@ static int fecmxc_probe(struct udevice *dev)
 		}
 
 		priv->clk_rate = clk_get_rate(&priv->ipg_clk);
+	} else if (CONFIG_IS_ENABLED(CLK_CCF)) {
+		ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
+		if (ret < 0) {
+			debug("Can't get FEC ipg clk: %d\n", ret);
+			return ret;
+		}
+		ret = clk_enable(&priv->ipg_clk);
+		if(ret)
+			return ret;
+
+		ret = clk_get_by_name(dev, "ahb", &priv->ahb_clk);
+		if (ret < 0) {
+			debug("Can't get FEC ahb clk: %d\n", ret);
+			return ret;
+		}
+		ret = clk_enable(&priv->ahb_clk);
+		if (ret)
+			return ret;
+
+		ret = clk_get_by_name(dev, "enet_out", &priv->clk_enet_out);
+		if (!ret) {
+			ret = clk_enable(&priv->clk_enet_out);
+			if (ret)
+				return ret;
+		}
+
+		ret = clk_get_by_name(dev, "enet_clk_ref", &priv->clk_ref);
+		if (!ret) {
+			ret = clk_enable(&priv->clk_ref);
+			if (ret)
+				return ret;
+		}
+
+		ret = clk_get_by_name(dev, "ptp", &priv->clk_ptp);
+		if (!ret) {
+			ret = clk_enable(&priv->clk_ptp);
+			if (ret)
+				return ret;
+		}
+
+		priv->clk_rate = clk_get_rate(&priv->ipg_clk);
 	}
 
 	ret = fec_alloc_descs(priv);
diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
index e5f2dd7..723b06a 100644
--- a/drivers/net/fec_mxc.h
+++ b/drivers/net/fec_mxc.h
@@ -264,6 +264,10 @@ struct fec_priv {
 	u32 interface;
 #endif
 	struct clk ipg_clk;
+	struct clk ahb_clk;
+	struct clk clk_enet_out;
+	struct clk clk_ref;
+	struct clk clk_ptp;
 	u32 clk_rate;
 };