kernel: add fix for bgmac with B50212E B1 PHY

This PHY requires some extra programming to work reliably with all
devices. Backport upstream fix for it.

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

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.4/073-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch b/target/linux/generic/pending-4.4/073-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch
new file mode 100644
index 0000000000..27cd660b5c
--- /dev/null
+++ b/target/linux/generic/pending-4.4/073-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch
@@ -0,0 +1,50 @@
+From 12acd136913ccdf394eeb2bc8686ff5505368119 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 12 Oct 2017 10:21:26 +0200
+Subject: [PATCH] net: bgmac: enable master mode for BCM54210E and B50212E PHYs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+There are 4 very similar PHYs:
+0x600d84a1: BCM54210E (rev B0)
+0x600d84a2: BCM54210E (rev B1)
+0x600d84a5: B50212E (rev B0)
+0x600d84a6: B50212E (rev B1)
+that need setting master mode manually. It's because they run in slave
+mode by default with Automatic Slave/Master configuration disabled which
+can lead to unreliable connection with massive ping loss.
+
+So far it was reported for a board with BCM47189 SoC and B50212E B1 PHY
+connected to the bgmac supported ethernet device. Telling PHY driver to
+setup PHY properly solves this issue.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/ethernet/broadcom/bgmac-bcma.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
++++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
+@@ -159,13 +159,19 @@ static int bgmac_probe(struct bcma_devic
+ 
+ 	if (!bgmac_is_bcm4707_family(core) &&
+ 	    !(ci->id == BCMA_CHIP_ID_BCM53573 && core->core_unit == 1)) {
++		struct phy_device *phydev;
++
+ 		mii_bus = bcma_mdio_mii_register(bgmac);
+ 		if (IS_ERR(mii_bus)) {
+ 			err = PTR_ERR(mii_bus);
+ 			goto err;
+ 		}
+-
+ 		bgmac->mii_bus = mii_bus;
++
++		phydev = bgmac->mii_bus->phy_map[bgmac->phyaddr];
++		if (ci->id == BCMA_CHIP_ID_BCM53573 && phydev &&
++		    (phydev->drv->phy_id & phydev->drv->phy_id_mask) == PHY_ID_BCM54210E)
++			phydev->dev_flags |= PHY_BRCM_EN_MASTER_MODE;
+ 	}
+ 
+ 	if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {