[U-Boot] [PATCH v2 5/7] net: fec_mxc: Update driver to use full clks for iMX8

[Ye Li]

Add support for more clocks used by iMX8 from DTB:
ref_clock, tx_2x_clock, ahb_clock
And update get clock rate interface to support multiple fec ports.

Signed-off-by: Ye Li <ye.li at nxp.com>
---
Changes in v2:
 - None

 drivers/net/fec_mxc.c | 47 ++++++++++++++++++++++++++++++++++++++---------
 drivers/net/fec_mxc.h |  1 +
 2 files changed, 39 insertions(+), 9 deletions(-)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index d7c0809..6d485f1 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -6,7 +6,6 @@
  * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer at pengutronix.de>
  * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert at pengutronix.de>
  */
-
 #include <common.h>
 #include <dm.h>
 #include <environment.h>
@@ -132,9 +131,9 @@ static int fec_get_clk_rate(void *udev, int idx)
 
 	dev = udev;
 	if (!dev) {
-		ret = uclass_get_device(UCLASS_ETH, idx, &dev);
+		ret = uclass_get_device_by_seq(UCLASS_ETH, idx, &dev);
 		if (ret < 0) {
-			debug("Can't get FEC udev: %d\n", ret);
+			debug("Can't get FEC udev%d: %d\n", idx, ret);
 			return ret;
 		}
 	}
@@ -149,7 +148,7 @@ static int fec_get_clk_rate(void *udev, int idx)
 #endif
 }
 
-static void fec_mii_setspeed(struct ethernet_regs *eth)
+static void fec_mii_setspeed(struct ethernet_regs *eth, int idx)
 {
 	/*
 	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
@@ -171,7 +170,7 @@ static void fec_mii_setspeed(struct ethernet_regs *eth)
 	u32 hold;
 	int ret;
 
-	ret = fec_get_clk_rate(NULL, 0);
+	ret = fec_get_clk_rate(NULL, idx);
 	if (ret < 0) {
 		printf("Can't find FEC0 clk rate: %d\n", ret);
 		return;
@@ -593,7 +592,7 @@ static int fec_init(struct eth_device *dev, bd_t *bd)
 	fec_reg_setup(fec);
 
 	if (fec->xcv_type != SEVENWIRE)
-		fec_mii_setspeed(fec->bus->priv);
+		fec_mii_setspeed(fec->bus->priv, fec->dev_id);
 
 	/* Set Opcode/Pause Duration Register */
 	writel(0x00010020, &fec->eth->op_pause);	/* FIXME 0xffff0020; */
@@ -1073,7 +1072,7 @@ struct mii_dev *fec_get_miibus(ulong base_addr, int dev_id)
 		free(bus);
 		return NULL;
 	}
-	fec_mii_setspeed(eth);
+	fec_mii_setspeed(eth, dev_id);
 	return bus;
 }
 
@@ -1142,7 +1141,7 @@ static int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr,
 	fec_set_dev_name(edev->name, dev_id);
 	fec->dev_id = (dev_id == -1) ? 0 : dev_id;
 	fec->bus = bus;
-	fec_mii_setspeed(bus->priv);
+	fec_mii_setspeed(bus->priv, fec->dev_id);
 #ifdef CONFIG_PHYLIB
 	fec->phydev = phydev;
 	phy_connect_dev(phydev, edev);
@@ -1324,6 +1323,7 @@ static int fecmxc_probe(struct udevice *dev)
 	int ret;
 
 	if (IS_ENABLED(CONFIG_IMX8)) {
+		struct clk ref_clk, clk_2x_txclk;
 		ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
 		if (ret < 0) {
 			debug("Can't get FEC ipg clk: %d\n", ret);
@@ -1335,6 +1335,35 @@ static int fecmxc_probe(struct udevice *dev)
 			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 < 0) {
+			debug("Can't enable FEC ahb clk: %d\n", ret);
+			return ret;
+		}
+
+		ret = clk_get_by_name(dev, "enet_clk_ref", &ref_clk);
+		if (ret >= 0) {
+			ret = clk_enable(&ref_clk);
+			if (ret < 0) {
+				debug("Can't enable FEC ref clk: %d\n", ret);
+				return ret;
+			}
+		}
+
+		ret = clk_get_by_name(dev, "enet_2x_txclk", &clk_2x_txclk);
+		if (ret >= 0) {
+			ret = clk_enable(&clk_2x_txclk);
+			if (ret < 0) {
+				debug("Can't enable FEC 2x_tx clk: %d\n", ret);
+				return ret;
+			}
+		}
+
 		priv->clk_rate = clk_get_rate(&priv->ipg_clk);
 	}
 
@@ -1368,7 +1397,6 @@ static int fecmxc_probe(struct udevice *dev)
 	}
 
 	fec_reg_setup(priv);
-
 	priv->dev_id = dev->seq;
 #ifdef CONFIG_FEC_MXC_MDIO_BASE
 	bus = fec_get_miibus((ulong)CONFIG_FEC_MXC_MDIO_BASE, dev->seq);
@@ -1492,6 +1520,7 @@ static const struct udevice_id fecmxc_ids[] = {
 	{ .compatible = "fsl,imx53-fec" },
 	{ .compatible = "fsl,imx7d-fec" },
 	{ .compatible = "fsl,mvf600-fec" },
+	{ .compatible = "fsl,imx8qm-fec" },
 	{ }
 };
 
diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
index e5f2dd7..23180a6 100644
--- a/drivers/net/fec_mxc.h
+++ b/drivers/net/fec_mxc.h
@@ -264,6 +264,7 @@ struct fec_priv {
 	u32 interface;
 #endif
 	struct clk ipg_clk;
+	struct clk ahb_clk;
 	u32 clk_rate;
 };
 
-- 
2.7.4