target/linux/starfive/patches-6.1/1000-net-stmmac-dwmac-starfive-Add-JH7100-support.patch

   1 From 22885637d0976473b04d4bae191fcf88e28b3df5 Mon Sep 17 00:00:00 2001
   2 From: Emil Renner Berthing <kernel@esmil.dk>
   3 Date: Wed, 29 Sep 2021 20:50:22 +0200
   4 Subject: [PATCH 1000/1024] net: stmmac: dwmac-starfive: Add JH7100 support
   5
   6 This adds support for setting the phy interface and delay chains on the
   7 StarFive JH7100 SoC.
   8
   9 Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
  10 ---
  11  .../net/ethernet/stmicro/stmmac/dwmac-starfive.c    | 13 +++++++++++++
  12  1 file changed, 13 insertions(+)
  13
  14 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
  15 +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
  16 @@ -17,6 +17,10 @@
  17  #define STARFIVE_DWMAC_PHY_INFT_RMII   0x4
  18  #define STARFIVE_DWMAC_PHY_INFT_FIELD  0x7U
  19
  20 +#define JH7100_SYSMAIN_REGISTER28 0x70
  21 +/* The value below is not a typo, just really bad naming by StarFive ¯\_(ツ)_/¯ */
  22 +#define JH7100_SYSMAIN_REGISTER49 0xc8
  23 +
  24  struct starfive_dwmac {
  25         struct device *dev;
  26         struct clk *clk_tx;
  27 @@ -56,6 +60,7 @@ static int starfive_dwmac_set_mode(struc
  28         struct regmap *regmap;
  29         unsigned int args[2];
  30         unsigned int mode;
  31 +       u32 gtxclk_dlychain;
  32         int err;
  33
  34         switch (plat_dat->interface) {
  35 @@ -65,6 +70,7 @@ static int starfive_dwmac_set_mode(struc
  36
  37         case PHY_INTERFACE_MODE_RGMII:
  38         case PHY_INTERFACE_MODE_RGMII_ID:
  39 +       case PHY_INTERFACE_MODE_RGMII_TXID:
  40                 mode = STARFIVE_DWMAC_PHY_INFT_RGMII;
  41                 break;
  42
  43 @@ -87,6 +93,12 @@ static int starfive_dwmac_set_mode(struc
  44         if (err)
  45                 return dev_err_probe(dwmac->dev, err, "error setting phy mode\n");
  46
  47 +       if (!of_property_read_u32(dwmac->dev->of_node, "starfive,gtxclk-dlychain", &gtxclk_dlychain)) {
  48 +               err = regmap_write(regmap, JH7100_SYSMAIN_REGISTER49, gtxclk_dlychain);
  49 +               if (err)
  50 +                       return dev_err_probe(dwmac->dev, err, "error selecting gtxclk delay chain\n");
  51 +       }
  52 +
  53         return 0;
  54  }
  55
  56 @@ -149,6 +161,7 @@ static int starfive_dwmac_probe(struct p
  57  }
  58
  59  static const struct of_device_id starfive_dwmac_match[] = {
  60 +       { .compatible = "starfive,jh7100-dwmac" },
  61         { .compatible = "starfive,jh7110-dwmac" },
  62         { /* sentinel */ }
  63  };