target/linux/mvebu/patches-3.10/0081-net-phy-call-mdiobus_scan-after-adding-a-fixed-PHY.patch

   1 From dce33dc5a6ba5f7fcbab4d7e92cc68c756a1f714 Mon Sep 17 00:00:00 2001
   2 From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   3 Date: Mon, 15 Jul 2013 17:34:09 +0200
   4 Subject: [PATCH 081/203] net: phy: call mdiobus_scan() after adding a fixed
   5  PHY
   6
   7 The fixed_phy_add() function allows to register a fixed PHY. However,
   8 when this function gets called *after* fixed_mdio_bus_init() (which
   9 gets called at the module_init stage), then the fixed PHY is not
  10 registered into the phylib.
  11
  12 In order to address this, we add a call to mdiobus_scan() in
  13 fixed_phy_add() to ensure that the PHY indeed gets registered into the
  14 phylib, even if the fixed_phy_add() is called after
  15 fixed_mdio_bus_init().
  16
  17 This is needed because until now, the only code that was calling the
  18 fixed_add_phy() function was PowerPC-specific platform code, which
  19 could ensure that such fixed PHYs get registered before
  20 fixed_mdio_bus_init() is called.
  21
  22 However, with the new of_phy_register_fixed_link() function, device
  23 drivers can parse their 'fixed-link' property and register a fixed PHY
  24 at ->probe() time, which may happen after fixed_mdio_bus_init() is
  25 called.
  26
  27 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  28 ---
  29  drivers/net/phy/fixed.c | 2 ++
  30  1 file changed, 2 insertions(+)
  31
  32 --- a/drivers/net/phy/fixed.c
  33 +++ b/drivers/net/phy/fixed.c
  34 @@ -195,6 +195,8 @@ int fixed_phy_add(unsigned int irq, int
  35
  36         list_add_tail(&fp->node, &fmb->phys);
  37
  38 +       mdiobus_scan(fmb->mii_bus, phy_id);
  39 +
  40         return 0;
  41
  42  err_regs: