brcm47xx: b44: add dummy phy device if we do not find any

On some devices with e.g. a BCM2535F switch the second MAC is used, but
we can not find a phy under all addresses between 0 and 31, 0xffffffff
is returned as phy id. If we can not find a phy at the expected address
create a dummy one.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 38538

diff --git a/target/linux/brcm47xx/patches-3.10/208-b44-add-dummy-phy-device-if-we-do-not-find-any.patch b/target/linux/brcm47xx/patches-3.10/208-b44-add-dummy-phy-device-if-we-do-not-find-any.patch
new file mode 100644 (file)
index 0000000..fd51a3f
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/208-b44-add-dummy-phy-device-if-we-do-not-find-any.patch
@@ -0,0 +1,64 @@
+From 1a900b17b34ddca0336c739a2836bcb7f8aad5a8 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Fri, 25 Oct 2013 00:03:33 +0200
+Subject: [PATCH 9/9] b44: add dummy phy device if we do not find any
+
+---
+ drivers/net/ethernet/broadcom/b44.c |   25 +++++++++++++++++++++----
+ 1 file changed, 21 insertions(+), 4 deletions(-)
+
+--- a/drivers/net/ethernet/broadcom/b44.c
++++ b/drivers/net/ethernet/broadcom/b44.c
+@@ -2222,6 +2222,8 @@ static int b44_register_phy_one(struct b
+       struct ssb_device *sdev = bp->sdev;
+       struct phy_device *phydev;
+       int err;
++      bool dummy_phy = false;
++      struct phy_c45_device_ids c45_ids = {0};
+ 
+       mii_bus = mdiobus_alloc();
+       if (!mii_bus) {
+@@ -2256,9 +2258,21 @@ static int b44_register_phy_one(struct b
+ 
+       phydev = bp->mii_bus->phy_map[bp->phy_addr];
+       if (!phydev) {
+-              dev_err(sdev->dev, "could not find PHY at %i\n", bp->phy_addr);
+-              err = -ENODEV;
+-              goto err_out_mdiobus_unregister;
++              dummy_phy = true;
++              dev_info(sdev->dev, "could not find PHY at %i, create dummy one\n",
++                       bp->phy_addr);
++
++              phydev = phy_device_create(bp->mii_bus, bp->phy_addr, 0x0, false, &c45_ids);
++              if (IS_ERR(phydev)) {
++                      err = PTR_ERR(phydev);
++                      dev_err(sdev->dev, "Can not create dummy PHY\n");
++                      goto err_out_mdiobus_unregister;
++              }
++              err = phy_device_register(phydev);
++              if (err) {
++                      dev_err(sdev->dev, "failed to register MII bus\n");
++                      goto err_out_phy_free;
++              }
+       }
+ 
+       err = phy_connect_direct(bp->dev, phydev, &b44_adjust_link,
+@@ -2266,7 +2280,7 @@ static int b44_register_phy_one(struct b
+       if (err < 0) {
+               dev_err(sdev->dev, "could not attach PHY at %i\n",
+                       bp->phy_addr);
+-              goto err_out_mdiobus_unregister;
++              goto err_out_phy_free;
+       }
+ 
+       /* mask with MAC supported features */
+@@ -2288,6 +2302,9 @@ static int b44_register_phy_one(struct b
+ 
+       return 0;
+ 
++err_out_phy_free:
++      if (phydev && dummy_phy)
++              phy_device_free(phydev);
+ err_out_mdiobus_unregister:
+       mdiobus_unregister(mii_bus);
+