[U-Boot] [patch] net: micrel: configure skew values for

[Pavel Machek]

This adds skew timing configuration for micrel ksz9021
configuration. With this patch, I can add

#define CONFIG_KSZ9021_CLK_SKEW_ENV    "micrel-ksz9021-clk-skew"
#define CONFIG_KSZ9021_CLK_SKEW_VAL    0xf0f0
#define CONFIG_KSZ9021_DATA_SKEW_ENV   "micrel-ksz9021-data-skew"
#define CONFIG_KSZ9021_DATA_SKEW_VAL   0x0

to my board's configuration file, and get working networking in
u-boot.

Signed-off-by: Pavel Machek <pavel at denx.de>

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 507b9a3..7e4dbd6 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -117,12 +119,31 @@ static int ksz9021_config(struct phy_device *phydev)
 {
 	unsigned ctrl1000 = 0;
 	const unsigned master = CTRL1000_PREFER_MASTER |
-			CTRL1000_CONFIG_MASTER | CTRL1000_MANUAL_CONFIG;
+				CTRL1000_CONFIG_MASTER | CTRL1000_MANUAL_CONFIG;
 	unsigned features = phydev->drv->features;
 
+	/* min rx data delay */
+	if (ksz9021_phy_extended_write(phydev,
+				       MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW,
+				       getenv_ulong(CONFIG_KSZ9021_DATA_SKEW_ENV, 16,
+						    CONFIG_KSZ9021_DATA_SKEW_VAL)) < 0)
+		return -1;
+	/* min tx data delay */
+	if (ksz9021_phy_extended_write(phydev,
+				       MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW,
+				       getenv_ulong(CONFIG_KSZ9021_DATA_SKEW_ENV, 16,
+						    CONFIG_KSZ9021_DATA_SKEW_VAL)) < 0)
+		return -1;
+	/* max rx/tx clock delay, min rx/tx control */
+	if (ksz9021_phy_extended_write(phydev,
+				       MII_KSZ9021_EXT_RGMII_CLOCK_SKEW,
+				       getenv_ulong(CONFIG_KSZ9021_CLK_SKEW_ENV, 16,
+						    CONFIG_KSZ9021_CLK_SKEW_VAL)) < 0)
+		return -1;
+
 	if (getenv("disable_giga"))
 		features &= ~(SUPPORTED_1000baseT_Half |
-				SUPPORTED_1000baseT_Full);
+			      SUPPORTED_1000baseT_Full);
 	/* force master mode for 1000BaseT due to chip errata */
 	if (features & SUPPORTED_1000baseT_Half)
 		ctrl1000 |= ADVERTISE_1000HALF | master;

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html