target/linux/layerscape/patches-5.4/701-net-0259-net-mscc-ocelot-separate-the-implementation-of-switc.patch

   1 From c96a1cff5d03a56f380ce761aec9d11fcf61c7f1 Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Thu, 14 Nov 2019 17:03:26 +0200
   4 Subject: [PATCH] net: mscc: ocelot: separate the implementation of switch
   5  reset
   6
   7 The Felix switch has a different reset procedure, so a function pointer
   8 needs to be created and added to the ocelot_ops structure.
   9
  10 The reset procedure has been moved into ocelot_init.
  11
  12 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  13 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 ---
  16  drivers/net/ethernet/mscc/ocelot.c       |  8 +++++++
  17  drivers/net/ethernet/mscc/ocelot.h       |  1 +
  18  drivers/net/ethernet/mscc/ocelot_board.c | 37 +++++++++++++++++++++-----------
  19  3 files changed, 33 insertions(+), 13 deletions(-)
  20
  21 --- a/drivers/net/ethernet/mscc/ocelot.c
  22 +++ b/drivers/net/ethernet/mscc/ocelot.c
  23 @@ -2268,6 +2268,14 @@ int ocelot_init(struct ocelot *ocelot)
  24         int i, ret;
  25         u32 port;
  26
  27 +       if (ocelot->ops->reset) {
  28 +               ret = ocelot->ops->reset(ocelot);
  29 +               if (ret) {
  30 +                       dev_err(ocelot->dev, "Switch reset failed\n");
  31 +                       return ret;
  32 +               }
  33 +       }
  34 +
  35         ocelot->lags = devm_kcalloc(ocelot->dev, ocelot->num_phys_ports,
  36                                     sizeof(u32), GFP_KERNEL);
  37         if (!ocelot->lags)
  38 --- a/drivers/net/ethernet/mscc/ocelot.h
  39 +++ b/drivers/net/ethernet/mscc/ocelot.h
  40 @@ -446,6 +446,7 @@ struct ocelot_stat_layout {
  41
  42  struct ocelot_ops {
  43         void (*pcs_init)(struct ocelot *ocelot, int port);
  44 +       int (*reset)(struct ocelot *ocelot);
  45  };
  46
  47  struct ocelot {
  48 --- a/drivers/net/ethernet/mscc/ocelot_board.c
  49 +++ b/drivers/net/ethernet/mscc/ocelot_board.c
  50 @@ -285,8 +285,32 @@ static void ocelot_port_pcs_init(struct
  51         ocelot_port_writel(ocelot_port, 0, PCS1G_LB_CFG);
  52  }
  53
  54 +static int ocelot_reset(struct ocelot *ocelot)
  55 +{
  56 +       int retries = 100;
  57 +       u32 val;
  58 +
  59 +       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_INIT], 1);
  60 +       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
  61 +
  62 +       do {
  63 +               msleep(1);
  64 +               regmap_field_read(ocelot->regfields[SYS_RESET_CFG_MEM_INIT],
  65 +                                 &val);
  66 +       } while (val && --retries);
  67 +
  68 +       if (!retries)
  69 +               return -ETIMEDOUT;
  70 +
  71 +       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
  72 +       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_CORE_ENA], 1);
  73 +
  74 +       return 0;
  75 +}
  76 +
  77  static const struct ocelot_ops ocelot_ops = {
  78         .pcs_init               = ocelot_port_pcs_init,
  79 +       .reset                  = ocelot_reset,
  80  };
  81
  82  static int mscc_ocelot_probe(struct platform_device *pdev)
  83 @@ -297,7 +321,6 @@ static int mscc_ocelot_probe(struct plat
  84         struct ocelot *ocelot;
  85         struct regmap *hsio;
  86         unsigned int i;
  87 -       u32 val;
  88
  89         struct {
  90                 enum ocelot_target id;
  91 @@ -377,18 +400,6 @@ static int mscc_ocelot_probe(struct plat
  92                 ocelot->ptp = 1;
  93         }
  94
  95 -       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_INIT], 1);
  96 -       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
  97 -
  98 -       do {
  99 -               msleep(1);
 100 -               regmap_field_read(ocelot->regfields[SYS_RESET_CFG_MEM_INIT],
 101 -                                 &val);
 102 -       } while (val);
 103 -
 104 -       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
 105 -       regmap_field_write(ocelot->regfields[SYS_RESET_CFG_CORE_ENA], 1);
 106 -
 107         ocelot->num_cpu_ports = 1; /* 1 port on the switch, two groups */
 108
 109         ports = of_get_child_by_name(np, "ethernet-ports");