target/linux/ipq806x/patches-4.1/703-stmmac-add-fixed-link-device-tree-support.patch

   1 From 3a95f75867be562cb919ff23a738f70357188fbd Mon Sep 17 00:00:00 2001
   2 From: Mathieu Olivari <mathieu@codeaurora.org>
   3 Date: Fri, 8 May 2015 16:02:03 -0700
   4 Subject: [PATCH 3/8] stmmac: add fixed-link device-tree support
   5
   6 In case DT is used, this change adds the ability to the stmmac driver to
   7 detect a fixed-link PHY, instanciate it, and use it during
   8 phy_connect().
   9
  10 Fixed link PHYs DT usage is described in:
  11 Documentation/devicetree/bindings/net/fixed-link.txt
  12
  13 Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
  14 ---
  15  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c     |  2 +-
  16  drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 12 +++++++++++-
  17  2 files changed, 12 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  20 +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  21 @@ -856,7 +856,7 @@ static int stmmac_init_phy(struct net_de
  22          * device as well.
  23          * Note: phydev->phy_id is the result of reading the UID PHY registers.
  24          */
  25 -       if (phydev->phy_id == 0) {
  26 +       if (!priv->plat->phy_node && phydev->phy_id == 0) {
  27                 phy_disconnect(phydev);
  28                 return -ENODEV;
  29         }
  30 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
  31 +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
  32 @@ -177,6 +177,14 @@ static int stmmac_probe_config_dt(struct
  33         /* If we find a phy-handle property, use it as the PHY */
  34         plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
  35
  36 +       /* If phy-handle is not specified, check if we have a fixed-phy */
  37 +       if (!plat->phy_node && of_phy_is_fixed_link(np)) {
  38 +               if ((of_phy_register_fixed_link(np) < 0))
  39 +                       return -ENODEV;
  40 +
  41 +               plat->phy_node = of_node_get(np);
  42 +       }
  43 +
  44         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
  45          * and warn of its use. Remove this when phy node support is added.
  46          */
  47 @@ -243,7 +251,7 @@ static int stmmac_probe_config_dt(struct
  48                                        GFP_KERNEL);
  49                 if (!dma_cfg) {
  50                         ret = -ENOMEM;
  51 -                       goto err;
  52 +                       goto err2;
  53                 }
  54                 plat->dma_cfg = dma_cfg;
  55                 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
  56 @@ -263,6 +271,8 @@ static int stmmac_probe_config_dt(struct
  57
  58         return 0;
  59
  60 +err2:
  61 +       of_node_put(np);
  62  err:
  63         return ret;
  64  }