add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/drivers/net/phy/dp83867.c
..
..
@@ -41,6 +41,7 @@
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 #define DP83867_STRAP_STS1	0x006E
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 #define DP83867_STRAP_STS2	0x006f
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 #define DP83867_RGMIIDCTL	0x0086
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+#define DP83867_DSP_FFE_CFG	0x012c
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 #define DP83867_RXFCFG		0x0134
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 #define DP83867_RXFPMD1	0x0136
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 #define DP83867_RXFPMD2	0x0137
..
..
@@ -801,14 +802,33 @@
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 {
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 	int err;
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+	err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESET);
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+	if (err < 0)
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+		return err;
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+
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+	usleep_range(10, 20);
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+
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+	err = phy_modify(phydev, MII_DP83867_PHYCTRL,
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+			 DP83867_PHYCR_FORCE_LINK_GOOD, 0);
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+	if (err < 0)
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+		return err;
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+
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+	/* Configure the DSP Feedforward Equalizer Configuration register to
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+	 * improve short cable (< 1 meter) performance. This will not affect
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+	 * long cable performance.
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+	 */
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+	err = phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_DSP_FFE_CFG,
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+			    0x0e81);
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+	if (err < 0)
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+		return err;
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+
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 	err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESTART);
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 	if (err < 0)
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 		return err;
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 	usleep_range(10, 20);
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-	return phy_modify(phydev, MII_DP83867_PHYCTRL,
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-			 DP83867_PHYCR_FORCE_LINK_GOOD, 0);
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+	return 0;
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 }
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 static void dp83867_link_change_notify(struct phy_device *phydev)