kernel: backport BCM54210E PHY support

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/generic/patches-4.4/078-0004-net-phy-pick-Broadcom-drivers-updates-from-net-next-.patch

@@ -82,7 +82,43 @@ Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  	{ PHY_ID_BCM7346, 0xfffffff0, },
 --- a/drivers/net/phy/broadcom.c
 +++ b/drivers/net/phy/broadcom.c
-@@ -395,12 +395,10 @@ static int bcm54612e_config_aneg(struct
+@@ -30,6 +30,22 @@ MODULE_DESCRIPTION("Broadcom PHY driver"
+ MODULE_AUTHOR("Maciej W. Rozycki");
+ MODULE_LICENSE("GPL");
+ 
++static int bcm54210e_config_init(struct phy_device *phydev)
++{
++	int val;
++
++	val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
++	val &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_RGMII_SKEW_EN;
++	val |= MII_BCM54XX_AUXCTL_MISC_WREN;
++	bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC, val);
++
++	val = bcm_phy_read_shadow(phydev, BCM54810_SHD_CLK_CTL);
++	val &= ~BCM54810_SHD_CLK_CTL_GTXCLK_EN;
++	bcm_phy_write_shadow(phydev, BCM54810_SHD_CLK_CTL, val);
++
++	return 0;
++}
++
+ static int bcm54810_config(struct phy_device *phydev)
+ {
+ 	int rc, val;
+@@ -230,7 +246,11 @@ static int bcm54xx_config_init(struct ph
+ 	    (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
+ 		bcm54xx_adjust_rxrefclk(phydev);
+ 
+-	if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54810) {
++	if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54210E) {
++		err = bcm54210e_config_init(phydev);
++		if (err)
++			return err;
++	} else if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54810) {
+ 		err = bcm54810_config(phydev);
+ 		if (err)
+ 			return err;
+@@ -395,12 +415,10 @@ static int bcm54612e_config_aneg(struct
  	    (phydev->interface != PHY_INTERFACE_MODE_RGMII_RXID)) {
  		u16 reg;
  
@@ -98,9 +134,43 @@ Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  		/* Clear shadow selector field */
  		reg &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MASK;
  		bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
+@@ -548,6 +566,17 @@ static struct phy_driver broadcom_driver
+ 	.config_intr	= bcm_phy_config_intr,
+ 	.driver		= { .owner = THIS_MODULE },
+ }, {
++	.phy_id		= PHY_ID_BCM54210E,
++	.phy_id_mask	= 0xfffffff0,
++	.name		= "Broadcom BCM54210E",
++	.features	= PHY_GBIT_FEATURES,
++	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
++	.config_init	= bcm54xx_config_init,
++	.config_aneg	= genphy_config_aneg,
++	.read_status	= genphy_read_status,
++	.ack_interrupt	= bcm_phy_ack_intr,
++	.config_intr	= bcm_phy_config_intr,
++}, {
+ 	.phy_id		= PHY_ID_BCM5461,
+ 	.phy_id_mask	= 0xfffffff0,
+ 	.name		= "Broadcom BCM5461",
+@@ -708,6 +737,7 @@ module_phy_driver(broadcom_drivers);
+ static struct mdio_device_id __maybe_unused broadcom_tbl[] = {
+ 	{ PHY_ID_BCM5411, 0xfffffff0 },
+ 	{ PHY_ID_BCM5421, 0xfffffff0 },
++	{ PHY_ID_BCM54210E, 0xfffffff0 },
+ 	{ PHY_ID_BCM5461, 0xfffffff0 },
+ 	{ PHY_ID_BCM54612E, 0xfffffff0 },
+ 	{ PHY_ID_BCM54616S, 0xfffffff0 },
 --- a/include/linux/brcmphy.h
 +++ b/include/linux/brcmphy.h
-@@ -24,6 +24,7 @@
+@@ -17,6 +17,7 @@
+ #define PHY_ID_BCM5482			0x0143bcb0
+ #define PHY_ID_BCM5411			0x00206070
+ #define PHY_ID_BCM5421			0x002060e0
++#define PHY_ID_BCM54210E		0x600d84a0
+ #define PHY_ID_BCM5464			0x002060b0
+ #define PHY_ID_BCM5461			0x002060c0
+ #define PHY_ID_BCM54612E		0x03625e60
+@@ -24,6 +25,7 @@
  #define PHY_ID_BCM57780			0x03625d90
  
  #define PHY_ID_BCM7250			0xae025280
@@ -108,7 +178,7 @@ Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  #define PHY_ID_BCM7364			0xae025260
  #define PHY_ID_BCM7366			0x600d8490
  #define PHY_ID_BCM7346			0x600d8650
-@@ -103,18 +104,17 @@
+@@ -103,18 +105,17 @@
  /*
   * AUXILIARY CONTROL SHADOW ACCESS REGISTERS.  (PHY REG 0x18)
   */